With .NET 9, I am attempting to get the properties of a NET.Assembly (like Classes or Interfaces), but this throws an error. For example, 

>> asmInfo = NET.addAssembly("System.Windows.Forms");
>> asmInfo.Classes
Unrecognized method, property, or field ‘IsInterface’ for class ‘System.RuntimeType’.
…
This same code works with .NET 8. Why am I getting an error with .NET 9?With .NET 9, I am attempting to get the properties of a NET.Assembly (like Classes or Interfaces), but this throws an error. For example, 

>> asmInfo = NET.addAssembly("System.Windows.Forms");
>> asmInfo.Classes
Unrecognized method, property, or field ‘IsInterface’ for class ‘System.RuntimeType’.
…
This same code works with .NET 8. Why am I getting an error with .NET 9? With .NET 9, I am attempting to get the properties of a NET.Assembly (like Classes or Interfaces), but this throws an error. For example, 

>> asmInfo = NET.addAssembly("System.Windows.Forms");
>> asmInfo.Classes
Unrecognized method, property, or field ‘IsInterface’ for class ‘System.RuntimeType’.
…
This same code works with .NET 8. Why am I getting an error with .NET 9?  MATLAB Answers — New Questions

​

Consider this code:

clear; close all;
n = 1e6;
m = 1e3;
s = 1e-3;
p = round(s^2 * n * m);
I = randperm(n, p);
J = randperm(m, p);
phi = sparse(I, J, 1, n, m);
Gx = randn(n, 1);
for k = 1:3
tic
L = Gx .* phi;
toc
end
Gx(1) = NaN;
for k = 1:3
tic
L = Gx .* phi;
toc
end

Now consider the output on my macbook pro M1 running Matlab 2024a (so through rosetta).

Elapsed time is 0.001591 seconds.
Elapsed time is 0.000291 seconds.
Elapsed time is 0.000282 seconds.
Elapsed time is 0.573762 seconds.
Elapsed time is 0.548177 seconds.
Elapsed time is 0.560880 seconds.

Notice the very large difference in computation times between the no-NaN version of Gx and the version that contains a single NaN value.

The solution is quite obvious, just remove the NaN values with your favorite method (isnan, isfinite, etc.). So this is not my question.

What intregues me is:
why the computation time changes so drastically?Consider this code:

clear; close all;
n = 1e6;
m = 1e3;
s = 1e-3;
p = round(s^2 * n * m);
I = randperm(n, p);
J = randperm(m, p);
phi = sparse(I, J, 1, n, m);
Gx = randn(n, 1);
for k = 1:3
tic
L = Gx .* phi;
toc
end
Gx(1) = NaN;
for k = 1:3
tic
L = Gx .* phi;
toc
end

Now consider the output on my macbook pro M1 running Matlab 2024a (so through rosetta).

Elapsed time is 0.001591 seconds.
Elapsed time is 0.000291 seconds.
Elapsed time is 0.000282 seconds.
Elapsed time is 0.573762 seconds.
Elapsed time is 0.548177 seconds.
Elapsed time is 0.560880 seconds.

Notice the very large difference in computation times between the no-NaN version of Gx and the version that contains a single NaN value.

The solution is quite obvious, just remove the NaN values with your favorite method (isnan, isfinite, etc.). So this is not my question.

What intregues me is:
why the computation time changes so drastically? Consider this code:

clear; close all;
n = 1e6;
m = 1e3;
s = 1e-3;
p = round(s^2 * n * m);
I = randperm(n, p);
J = randperm(m, p);
phi = sparse(I, J, 1, n, m);
Gx = randn(n, 1);
for k = 1:3
tic
L = Gx .* phi;
toc
end
Gx(1) = NaN;
for k = 1:3
tic
L = Gx .* phi;
toc
end

Now consider the output on my macbook pro M1 running Matlab 2024a (so through rosetta).

Elapsed time is 0.001591 seconds.
Elapsed time is 0.000291 seconds.
Elapsed time is 0.000282 seconds.
Elapsed time is 0.573762 seconds.
Elapsed time is 0.548177 seconds.
Elapsed time is 0.560880 seconds.

Notice the very large difference in computation times between the no-NaN version of Gx and the version that contains a single NaN value.

The solution is quite obvious, just remove the NaN values with your favorite method (isnan, isfinite, etc.). So this is not my question.

What intregues me is:
why the computation time changes so drastically? sparse, mtimes MATLAB Answers — New Questions

​

Hello, I have been trying to create a heat map with the following characteristics: variation of the magnitude of the increase in vertical effort in a mesh every 1 cm for point, linear, and distributed rectangular loads. I am a civil engineer and hope you can help me.heat mapHello, I have been trying to create a heat map with the following characteristics: variation of the magnitude of the increase in vertical effort in a mesh every 1 cm for point, linear, and distributed rectangular loads. I am a civil engineer and hope you can help me.heat map Hello, I have been trying to create a heat map with the following characteristics: variation of the magnitude of the increase in vertical effort in a mesh every 1 cm for point, linear, and distributed rectangular loads. I am a civil engineer and hope you can help me.heat map heat map MATLAB Answers — New Questions

​

Hi. MATLAB Community. I am trying to get the following code to work. I’m working on a toy example that I hope to get running correctly before applying it to a larger numerical project. The issue I’m facing is that the values of k and rho_0 are not updating properly when I Area_Integral from the command window for different values of k and rho_0 (I am selecting k and rho_0 values so it stays in the if loop of the Area_Integral file. I uploaded the code for the various scripts I am using. When I write this in the command window, Area_Integral (1,0.4) and then Area_Integral (1.5,0.4) the value of k is not updated for the later case.
function out = Area_Integral(k, rho_0)
global k rho_0
if k>=1-rho_0^2
theta_array = linspace(0,pi/2,101);
root = zeros(size(theta_array));
for ii = 1:length(theta_array)
theta = theta_array(ii);
root(ii) = mnhf_secant(@poly4,[0.4 0.8],1e-8,0); %% Note: values of k, r0 and theta must be made accessible to poly4
end
out = 2*trapz(theta_array,root);
else

r_upperlim = sqrt(1+rho_0^2+sqrt(k^2+4*rho_0^2));
r_lowerlim = sqrt(1+rho_0^2-sqrt(k^2+4*rho_0^2));

fun_A2 = @(r) acos((r.^4+(1-rho_0^2)^2-k^2)./2./r.^2-rho_0^2).*r;

out = integral(fun_A2,r_lowerlim,r_upperlim);
end
if rho_0 == 1 && k <= 1e-12
out = pi;
end

end

function f = poly4(x)
global k rho_0 theta
disp([‘Values: k=’ num2str(k) ‘, rho_0=’ num2str(rho_0) ‘, theta=’ num2str(theta) ‘, x=’ num2str(x)])
disp([‘size(x): ‘ num2str(size(x))])
disp([‘size(k): ‘ num2str(size(k))])
disp([‘size(rho_0): ‘ num2str(size(rho_0))])
disp([‘size(theta): ‘ num2str(size(theta))])
k
%Equation B3 from Shuo and Li (LF20B)
f = (x.^2-2.*x.*cos(theta)+1-rho_0^2).*(x.^2-2.*x.*cos(theta+pi)+1-rho_0^2)-k.^2;
disp([‘f = ‘ num2str(f)])
end

function r=mnhf_secant(Fun,x,tol,trace)
%MNHF_SECANT finds the root of "Fun" using secant scheme.
%
% Fun – name of the external function
% x – vector of length 2, (initial guesses)
% tol – tolerance
% trace – print intermediate results
%
% Usage mnhf_secant(@poly1,[-0.5 2.0],1e-8,1)
% poly1 is the name of the external function.
% [-0.5 2.0] are the initial guesses for the root.

% Check inputs.
if nargin < 4, trace = 1; end
if nargin < 3, tol = 1e-8; end
if (length(x) ~= 2)
error(‘Please provide two initial guesses’)
end

f = feval(Fun,x); % Fun is assumed to accept a vector

for i = 1:100
x3 = x(1)-f(1)*(x(2)-x(1))/(f(2)-f(1)); % Update the guess.
f3 = feval(Fun,x3); % Function evaluation.
if trace, fprintf(1,’%3i %12.5f %12.5fn’, i,x3,f3); end
if abs(f3) < tol % Check for convergenece.
r = x3;
return
else % Reset values for x(1), x(2), f(1) and f(2).
x(1) = x(2); f(1) = f(2); x(2) = x3; f(2) = f3;
end
end

r = NaN;Hi. MATLAB Community. I am trying to get the following code to work. I’m working on a toy example that I hope to get running correctly before applying it to a larger numerical project. The issue I’m facing is that the values of k and rho_0 are not updating properly when I Area_Integral from the command window for different values of k and rho_0 (I am selecting k and rho_0 values so it stays in the if loop of the Area_Integral file. I uploaded the code for the various scripts I am using. When I write this in the command window, Area_Integral (1,0.4) and then Area_Integral (1.5,0.4) the value of k is not updated for the later case.
function out = Area_Integral(k, rho_0)
global k rho_0
if k>=1-rho_0^2
theta_array = linspace(0,pi/2,101);
root = zeros(size(theta_array));
for ii = 1:length(theta_array)
theta = theta_array(ii);
root(ii) = mnhf_secant(@poly4,[0.4 0.8],1e-8,0); %% Note: values of k, r0 and theta must be made accessible to poly4
end
out = 2*trapz(theta_array,root);
else

r_upperlim = sqrt(1+rho_0^2+sqrt(k^2+4*rho_0^2));
r_lowerlim = sqrt(1+rho_0^2-sqrt(k^2+4*rho_0^2));

fun_A2 = @(r) acos((r.^4+(1-rho_0^2)^2-k^2)./2./r.^2-rho_0^2).*r;

out = integral(fun_A2,r_lowerlim,r_upperlim);
end
if rho_0 == 1 && k <= 1e-12
out = pi;
end

end

function f = poly4(x)
global k rho_0 theta
disp([‘Values: k=’ num2str(k) ‘, rho_0=’ num2str(rho_0) ‘, theta=’ num2str(theta) ‘, x=’ num2str(x)])
disp([‘size(x): ‘ num2str(size(x))])
disp([‘size(k): ‘ num2str(size(k))])
disp([‘size(rho_0): ‘ num2str(size(rho_0))])
disp([‘size(theta): ‘ num2str(size(theta))])
k
%Equation B3 from Shuo and Li (LF20B)
f = (x.^2-2.*x.*cos(theta)+1-rho_0^2).*(x.^2-2.*x.*cos(theta+pi)+1-rho_0^2)-k.^2;
disp([‘f = ‘ num2str(f)])
end

function r=mnhf_secant(Fun,x,tol,trace)
%MNHF_SECANT finds the root of "Fun" using secant scheme.
%
% Fun – name of the external function
% x – vector of length 2, (initial guesses)
% tol – tolerance
% trace – print intermediate results
%
% Usage mnhf_secant(@poly1,[-0.5 2.0],1e-8,1)
% poly1 is the name of the external function.
% [-0.5 2.0] are the initial guesses for the root.

% Check inputs.
if nargin < 4, trace = 1; end
if nargin < 3, tol = 1e-8; end
if (length(x) ~= 2)
error(‘Please provide two initial guesses’)
end

f = feval(Fun,x); % Fun is assumed to accept a vector

for i = 1:100
x3 = x(1)-f(1)*(x(2)-x(1))/(f(2)-f(1)); % Update the guess.
f3 = feval(Fun,x3); % Function evaluation.
if trace, fprintf(1,’%3i %12.5f %12.5fn’, i,x3,f3); end
if abs(f3) < tol % Check for convergenece.
r = x3;
return
else % Reset values for x(1), x(2), f(1) and f(2).
x(1) = x(2); f(1) = f(2); x(2) = x3; f(2) = f3;
end
end

r = NaN; Hi. MATLAB Community. I am trying to get the following code to work. I’m working on a toy example that I hope to get running correctly before applying it to a larger numerical project. The issue I’m facing is that the values of k and rho_0 are not updating properly when I Area_Integral from the command window for different values of k and rho_0 (I am selecting k and rho_0 values so it stays in the if loop of the Area_Integral file. I uploaded the code for the various scripts I am using. When I write this in the command window, Area_Integral (1,0.4) and then Area_Integral (1.5,0.4) the value of k is not updated for the later case.
function out = Area_Integral(k, rho_0)
global k rho_0
if k>=1-rho_0^2
theta_array = linspace(0,pi/2,101);
root = zeros(size(theta_array));
for ii = 1:length(theta_array)
theta = theta_array(ii);
root(ii) = mnhf_secant(@poly4,[0.4 0.8],1e-8,0); %% Note: values of k, r0 and theta must be made accessible to poly4
end
out = 2*trapz(theta_array,root);
else

r_upperlim = sqrt(1+rho_0^2+sqrt(k^2+4*rho_0^2));
r_lowerlim = sqrt(1+rho_0^2-sqrt(k^2+4*rho_0^2));

fun_A2 = @(r) acos((r.^4+(1-rho_0^2)^2-k^2)./2./r.^2-rho_0^2).*r;

out = integral(fun_A2,r_lowerlim,r_upperlim);
end
if rho_0 == 1 && k <= 1e-12
out = pi;
end

end

function f = poly4(x)
global k rho_0 theta
disp([‘Values: k=’ num2str(k) ‘, rho_0=’ num2str(rho_0) ‘, theta=’ num2str(theta) ‘, x=’ num2str(x)])
disp([‘size(x): ‘ num2str(size(x))])
disp([‘size(k): ‘ num2str(size(k))])
disp([‘size(rho_0): ‘ num2str(size(rho_0))])
disp([‘size(theta): ‘ num2str(size(theta))])
k
%Equation B3 from Shuo and Li (LF20B)
f = (x.^2-2.*x.*cos(theta)+1-rho_0^2).*(x.^2-2.*x.*cos(theta+pi)+1-rho_0^2)-k.^2;
disp([‘f = ‘ num2str(f)])
end

function r=mnhf_secant(Fun,x,tol,trace)
%MNHF_SECANT finds the root of "Fun" using secant scheme.
%
% Fun – name of the external function
% x – vector of length 2, (initial guesses)
% tol – tolerance
% trace – print intermediate results
%
% Usage mnhf_secant(@poly1,[-0.5 2.0],1e-8,1)
% poly1 is the name of the external function.
% [-0.5 2.0] are the initial guesses for the root.

% Check inputs.
if nargin < 4, trace = 1; end
if nargin < 3, tol = 1e-8; end
if (length(x) ~= 2)
error(‘Please provide two initial guesses’)
end

f = feval(Fun,x); % Fun is assumed to accept a vector

for i = 1:100
x3 = x(1)-f(1)*(x(2)-x(1))/(f(2)-f(1)); % Update the guess.
f3 = feval(Fun,x3); % Function evaluation.
if trace, fprintf(1,’%3i %12.5f %12.5fn’, i,x3,f3); end
if abs(f3) < tol % Check for convergenece.
r = x3;
return
else % Reset values for x(1), x(2), f(1) and f(2).
x(1) = x(2); f(1) = f(2); x(2) = x3; f(2) = f3;
end
end

r = NaN; global variables MATLAB Answers — New Questions

​

I am getting this error while trying to run the example code at GitHub – mathworks/OpenTrafficLab: OpenTrafficLab is a MATLAB environment capable of simulating simple traffic scenarios with modular vehicle and junction controllers.

The lastb code block is the one returning the error
%Advance the Scenario
while advance(scenario)
plotOpenPaths(trafficLight)
drawnow limitrate
end

Unrecognized method, property, or field ‘ReferencePoint’ for class ‘DrivingStrategy’.

Error in driving.scenario.DefaultScenario/actorPoses (line 23)
if isa(obj.Scenario.Actors(i),"driving.scenario.Vehicle") && ~isa(motionStrategy,"driving.scenario.Stationary") && isequal(motionStrategy.ReferencePoint, "front-axle")

Error in drivingScenario/actorPoses (line 51)
a = actorPoses(obj.Scenario);

Error in drivingScenario/setUpSensorSimulation (line 474)
obj.SensorSimulation.addActors(actorProfiles(obj), actorPoses(obj));

Error in driving.scenario.DefaultScenario/advance (line 8)
setUpSensorSimulation(obj.Scenario);

Error in drivingScenario/advance (line 42)
running = advance(obj.Scenario);I am getting this error while trying to run the example code at GitHub – mathworks/OpenTrafficLab: OpenTrafficLab is a MATLAB environment capable of simulating simple traffic scenarios with modular vehicle and junction controllers.

The lastb code block is the one returning the error
%Advance the Scenario
while advance(scenario)
plotOpenPaths(trafficLight)
drawnow limitrate
end

Unrecognized method, property, or field ‘ReferencePoint’ for class ‘DrivingStrategy’.

Error in driving.scenario.DefaultScenario/actorPoses (line 23)
if isa(obj.Scenario.Actors(i),"driving.scenario.Vehicle") && ~isa(motionStrategy,"driving.scenario.Stationary") && isequal(motionStrategy.ReferencePoint, "front-axle")

Error in drivingScenario/actorPoses (line 51)
a = actorPoses(obj.Scenario);

Error in drivingScenario/setUpSensorSimulation (line 474)
obj.SensorSimulation.addActors(actorProfiles(obj), actorPoses(obj));

Error in driving.scenario.DefaultScenario/advance (line 8)
setUpSensorSimulation(obj.Scenario);

Error in drivingScenario/advance (line 42)
running = advance(obj.Scenario); I am getting this error while trying to run the example code at GitHub – mathworks/OpenTrafficLab: OpenTrafficLab is a MATLAB environment capable of simulating simple traffic scenarios with modular vehicle and junction controllers.

The lastb code block is the one returning the error
%Advance the Scenario
while advance(scenario)
plotOpenPaths(trafficLight)
drawnow limitrate
end

Unrecognized method, property, or field ‘ReferencePoint’ for class ‘DrivingStrategy’.

Error in driving.scenario.DefaultScenario/actorPoses (line 23)
if isa(obj.Scenario.Actors(i),"driving.scenario.Vehicle") && ~isa(motionStrategy,"driving.scenario.Stationary") && isequal(motionStrategy.ReferencePoint, "front-axle")

Error in drivingScenario/actorPoses (line 51)
a = actorPoses(obj.Scenario);

Error in drivingScenario/setUpSensorSimulation (line 474)
obj.SensorSimulation.addActors(actorProfiles(obj), actorPoses(obj));

Error in driving.scenario.DefaultScenario/advance (line 8)
setUpSensorSimulation(obj.Scenario);

Error in drivingScenario/advance (line 42)
running = advance(obj.Scenario); automated driving toolbox MATLAB Answers — New Questions

​

I have a psychology experiment paradigm which asks participants to give a verbal response immediately after they hear a beep sound. Participants may or may not respond to the beep, and their response could be quick or slow. I need to extract the time length between the end of the beep sound and the start of their verbal response. Such time length should be measured in miliseconds as the total time allowed for each response was 3 seconds (3000 ms). There are hundreds of trials so I would like to find a way to do the extraction automatically. How should I achieve this? Carload thanks to any suggestions!I have a psychology experiment paradigm which asks participants to give a verbal response immediately after they hear a beep sound. Participants may or may not respond to the beep, and their response could be quick or slow. I need to extract the time length between the end of the beep sound and the start of their verbal response. Such time length should be measured in miliseconds as the total time allowed for each response was 3 seconds (3000 ms). There are hundreds of trials so I would like to find a way to do the extraction automatically. How should I achieve this? Carload thanks to any suggestions! I have a psychology experiment paradigm which asks participants to give a verbal response immediately after they hear a beep sound. Participants may or may not respond to the beep, and their response could be quick or slow. I need to extract the time length between the end of the beep sound and the start of their verbal response. Such time length should be measured in miliseconds as the total time allowed for each response was 3 seconds (3000 ms). There are hundreds of trials so I would like to find a way to do the extraction automatically. How should I achieve this? Carload thanks to any suggestions! signal processing, audio signal processing MATLAB Answers — New Questions

​

I’m following the Channel Operating Margin (COM) for Serial Link tutorial from the Signal Integrity Toolbox. I’m following the tutorial exactly, not trying to make any modifications. I get to Step 5 and click "Run COM" in the Channel Operating Margin (COM) Manager. After running for a bit, I get the error:&nbsp;

Error using ^ (line 52)
Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To operate on each element of the matrix individually, use POWER (.^) for elementwise power.
Why is this happening? I’ve attached the full MATLAB command window output below:

Processing 1/5: C:myRootCOM_100G_KRinterfaces100G_KRpre_simsCrosstalkdefault.ssmqcdqcd_ttte_clearance1qcd_ttte_clearance1.nc.s20p

Warning: COM controls for DIAGNOSTIC and DISPLAY_WINDOW turned off because of limitations in com_ieee8023_93a.m for MATLAB versions 14b and newer.
&gt; In comGUI&gt;comWrapper (line 574)
In comGUI&gt;run_com_Callback (line 365)
In matlab.ui.internal.controller.uicontrol/UIControlController/triggerActionEvent (line 76)
In matlab.ui.internal.controller.uicontrol/UIControlPushButtonController/handleEvent (line 29)
In matlab.ui.internal.controller.uicontrol.UIControlController&gt;@(varargin)obj.handleEvent(varargin{:}) (line 71)
In viewmodel.internal.factory.ManagerFactoryProducer&gt;@(src,event)callback(src,viewmodel.internal.factory.ManagerFactoryProducer.convertStructToEventData(event)) (line 76)
Creating s4p’s . . . done.

Running COM . . .
This is NOT an official IEEE document.
Revision: 2.95 This is a computation example for exploring COM and ERL for projects like IEEE P802.3bj/b/bs/cd/ck with some exploratory extensions and is not normative or official
reading file 1 2 3 4 5
reading file Error using ^ (line 52)
Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To operate on each element of the matrix individually, use POWER (.^) for elementwise power.

Error in com_ieee8023_93a_295 (line 642)
MDFEXT_ICN=sqrt(2*chdata(i).delta_f/param.f2*sum( chdata(i).Aicn^2*PWF(1:index_f2).*abs(MDFEXT(1:index_f2)).^2)); %eq 46
^
Error in comGUI&gt;comWrapper (line 668)
comresults = comFunction(cfg_name,…
^^^^^^^^^^^^^^^^^^^^^^^^
Error in comGUI&gt;run_com_Callback (line 365)
comWrapper(comdat,com_template_xls_fn,com_ieee8023_93a_fn,sit_csv_write_path,handles);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error using matlab.ui.internal.controller.uicontrol.UIControlController/triggerActionEvent (line 76)
Error while evaluating UIControl Callback.
&nbsp;I’m following the Channel Operating Margin (COM) for Serial Link tutorial from the Signal Integrity Toolbox. I’m following the tutorial exactly, not trying to make any modifications. I get to Step 5 and click "Run COM" in the Channel Operating Margin (COM) Manager. After running for a bit, I get the error:&nbsp;

Error using ^ (line 52)
Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To operate on each element of the matrix individually, use POWER (.^) for elementwise power.
Why is this happening? I’ve attached the full MATLAB command window output below:

Processing 1/5: C:myRootCOM_100G_KRinterfaces100G_KRpre_simsCrosstalkdefault.ssmqcdqcd_ttte_clearance1qcd_ttte_clearance1.nc.s20p

Warning: COM controls for DIAGNOSTIC and DISPLAY_WINDOW turned off because of limitations in com_ieee8023_93a.m for MATLAB versions 14b and newer.
&gt; In comGUI&gt;comWrapper (line 574)
In comGUI&gt;run_com_Callback (line 365)
In matlab.ui.internal.controller.uicontrol/UIControlController/triggerActionEvent (line 76)
In matlab.ui.internal.controller.uicontrol/UIControlPushButtonController/handleEvent (line 29)
In matlab.ui.internal.controller.uicontrol.UIControlController&gt;@(varargin)obj.handleEvent(varargin{:}) (line 71)
In viewmodel.internal.factory.ManagerFactoryProducer&gt;@(src,event)callback(src,viewmodel.internal.factory.ManagerFactoryProducer.convertStructToEventData(event)) (line 76)
Creating s4p’s . . . done.

Running COM . . .
This is NOT an official IEEE document.
Revision: 2.95 This is a computation example for exploring COM and ERL for projects like IEEE P802.3bj/b/bs/cd/ck with some exploratory extensions and is not normative or official
reading file 1 2 3 4 5
reading file Error using ^ (line 52)
Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To operate on each element of the matrix individually, use POWER (.^) for elementwise power.

Error in com_ieee8023_93a_295 (line 642)
MDFEXT_ICN=sqrt(2*chdata(i).delta_f/param.f2*sum( chdata(i).Aicn^2*PWF(1:index_f2).*abs(MDFEXT(1:index_f2)).^2)); %eq 46
^
Error in comGUI&gt;comWrapper (line 668)
comresults = comFunction(cfg_name,…
^^^^^^^^^^^^^^^^^^^^^^^^
Error in comGUI&gt;run_com_Callback (line 365)
comWrapper(comdat,com_template_xls_fn,com_ieee8023_93a_fn,sit_csv_write_path,handles);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error using matlab.ui.internal.controller.uicontrol.UIControlController/triggerActionEvent (line 76)
Error while evaluating UIControl Callback.
&nbsp; I’m following the Channel Operating Margin (COM) for Serial Link tutorial from the Signal Integrity Toolbox. I’m following the tutorial exactly, not trying to make any modifications. I get to Step 5 and click "Run COM" in the Channel Operating Margin (COM) Manager. After running for a bit, I get the error:&nbsp;

Error using ^ (line 52)
Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To operate on each element of the matrix individually, use POWER (.^) for elementwise power.
Why is this happening? I’ve attached the full MATLAB command window output below:

Processing 1/5: C:myRootCOM_100G_KRinterfaces100G_KRpre_simsCrosstalkdefault.ssmqcdqcd_ttte_clearance1qcd_ttte_clearance1.nc.s20p

Warning: COM controls for DIAGNOSTIC and DISPLAY_WINDOW turned off because of limitations in com_ieee8023_93a.m for MATLAB versions 14b and newer.
&gt; In comGUI&gt;comWrapper (line 574)
In comGUI&gt;run_com_Callback (line 365)
In matlab.ui.internal.controller.uicontrol/UIControlController/triggerActionEvent (line 76)
In matlab.ui.internal.controller.uicontrol/UIControlPushButtonController/handleEvent (line 29)
In matlab.ui.internal.controller.uicontrol.UIControlController&gt;@(varargin)obj.handleEvent(varargin{:}) (line 71)
In viewmodel.internal.factory.ManagerFactoryProducer&gt;@(src,event)callback(src,viewmodel.internal.factory.ManagerFactoryProducer.convertStructToEventData(event)) (line 76)
Creating s4p’s . . . done.

Running COM . . .
This is NOT an official IEEE document.
Revision: 2.95 This is a computation example for exploring COM and ERL for projects like IEEE P802.3bj/b/bs/cd/ck with some exploratory extensions and is not normative or official
reading file 1 2 3 4 5
reading file Error using ^ (line 52)
Incorrect dimensions for raising a matrix to a power. Check that the matrix is square and the power is a scalar. To operate on each element of the matrix individually, use POWER (.^) for elementwise power.

Error in com_ieee8023_93a_295 (line 642)
MDFEXT_ICN=sqrt(2*chdata(i).delta_f/param.f2*sum( chdata(i).Aicn^2*PWF(1:index_f2).*abs(MDFEXT(1:index_f2)).^2)); %eq 46
^
Error in comGUI&gt;comWrapper (line 668)
comresults = comFunction(cfg_name,…
^^^^^^^^^^^^^^^^^^^^^^^^
Error in comGUI&gt;run_com_Callback (line 365)
comWrapper(comdat,com_template_xls_fn,com_ieee8023_93a_fn,sit_csv_write_path,handles);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error using matlab.ui.internal.controller.uicontrol.UIControlController/triggerActionEvent (line 76)
Error while evaluating UIControl Callback.
&nbsp; serial, link, designer, channel, operating, margin, com, signal, integrity, toolbox, config, path MATLAB Answers — New Questions

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Hi everyone,
I’m running a Simulink Desktop Real-Time model that includes a VR Sink block (from Simulink 3D Animation) to display a virtual world. Everything works fine until I open the VR viewer in fullscreen mode.
When I exit fullscreen, MATLAB immediately shows an error in the Command Window, and the simulation freezes, it doesn’t continue running, and I have to stop and restart the model manually.
This happens consistently. Here are some details about my setup:
MATLAB version: R2024b
Simulation mode: Simulink Desktop Real-Time (External mode)
run in Kernel
I’m aware that in newer releases (R2025a and later) the VR Sink and related blocks are no longer supported, replaced by the new Simscape / Simulation 3D environment. However, I must use Simulink Desktop Real-Time, which currently does not support the new 3D blocks, so updating is not a viable option for my setup.
I need fullscreen rendering for human–VR interaction experiments, so I can’t avoid fullscreen mode.
Has anyone encountered this problem before? Is there a known workaround or patch for using fullscreen in VR Sink + Simulink Desktop Real-Time?
Thanks in advance for any suggestion or insight!Hi everyone,
I’m running a Simulink Desktop Real-Time model that includes a VR Sink block (from Simulink 3D Animation) to display a virtual world. Everything works fine until I open the VR viewer in fullscreen mode.
When I exit fullscreen, MATLAB immediately shows an error in the Command Window, and the simulation freezes, it doesn’t continue running, and I have to stop and restart the model manually.
This happens consistently. Here are some details about my setup:
MATLAB version: R2024b
Simulation mode: Simulink Desktop Real-Time (External mode)
run in Kernel
I’m aware that in newer releases (R2025a and later) the VR Sink and related blocks are no longer supported, replaced by the new Simscape / Simulation 3D environment. However, I must use Simulink Desktop Real-Time, which currently does not support the new 3D blocks, so updating is not a viable option for my setup.
I need fullscreen rendering for human–VR interaction experiments, so I can’t avoid fullscreen mode.
Has anyone encountered this problem before? Is there a known workaround or patch for using fullscreen in VR Sink + Simulink Desktop Real-Time?
Thanks in advance for any suggestion or insight! Hi everyone,
I’m running a Simulink Desktop Real-Time model that includes a VR Sink block (from Simulink 3D Animation) to display a virtual world. Everything works fine until I open the VR viewer in fullscreen mode.
When I exit fullscreen, MATLAB immediately shows an error in the Command Window, and the simulation freezes, it doesn’t continue running, and I have to stop and restart the model manually.
This happens consistently. Here are some details about my setup:
MATLAB version: R2024b
Simulation mode: Simulink Desktop Real-Time (External mode)
run in Kernel
I’m aware that in newer releases (R2025a and later) the VR Sink and related blocks are no longer supported, replaced by the new Simscape / Simulation 3D environment. However, I must use Simulink Desktop Real-Time, which currently does not support the new 3D blocks, so updating is not a viable option for my setup.
I need fullscreen rendering for human–VR interaction experiments, so I can’t avoid fullscreen mode.
Has anyone encountered this problem before? Is there a known workaround or patch for using fullscreen in VR Sink + Simulink Desktop Real-Time?
Thanks in advance for any suggestion or insight! simulink, vr sink, fullscreen, matlab, simulation MATLAB Answers — New Questions

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