There are five parameters in the fitting function, we can first fix one of the parameters according to a general knowledge. reviously, we fitted multiple datasets (e.g., time-resolved spectra at different pump powers) independently. Now, we need to perform a global fit where the cavity linewidth (Γ_cav) must decay exponentially across all datasets. Our model is a two-coupled oscillator modeal, where the resonance energy and linewidth of emitters and cavity, and their coupling strength are obtained parameters. Could you advise on the general strategy for setting initial values in this case？Perhaps, could we implement a loop. In each iteration for a new dataset, the intial guess for the cavity linewidth (Γ_cav) would be perdicated on the exponential decay function using the parameters estimated fromthe already fitted datasets？There are five parameters in the fitting function, we can first fix one of the parameters according to a general knowledge. reviously, we fitted multiple datasets (e.g., time-resolved spectra at different pump powers) independently. Now, we need to perform a global fit where the cavity linewidth (Γ_cav) must decay exponentially across all datasets. Our model is a two-coupled oscillator modeal, where the resonance energy and linewidth of emitters and cavity, and their coupling strength are obtained parameters. Could you advise on the general strategy for setting initial values in this case？Perhaps, could we implement a loop. In each iteration for a new dataset, the intial guess for the cavity linewidth (Γ_cav) would be perdicated on the exponential decay function using the parameters estimated fromthe already fitted datasets？ There are five parameters in the fitting function, we can first fix one of the parameters according to a general knowledge. reviously, we fitted multiple datasets (e.g., time-resolved spectra at different pump powers) independently. Now, we need to perform a global fit where the cavity linewidth (Γ_cav) must decay exponentially across all datasets. Our model is a two-coupled oscillator modeal, where the resonance energy and linewidth of emitters and cavity, and their coupling strength are obtained parameters. Could you advise on the general strategy for setting initial values in this case？Perhaps, could we implement a loop. In each iteration for a new dataset, the intial guess for the cavity linewidth (Γ_cav) would be perdicated on the exponential decay function using the parameters estimated fromthe already fitted datasets？ transferred MATLAB Answers — New Questions

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I’m building a piezoelectric generator with boost converter for my assignment and I’m trying to create a feedback loop by using the capacitor voltage to control the switch for boost converter. The model works fine when the switch is disconnected, or controlled using a pulse generator, but it stops working when I connect the switch to the capacitor voltage. Any idea how to fix this?
The fullwave rectifier and piezoelectric generator is mostly following the design from this example model. https://www.mathworks.com/help/sps/ug/piezo-bender-energy-harvester.htmlI’m building a piezoelectric generator with boost converter for my assignment and I’m trying to create a feedback loop by using the capacitor voltage to control the switch for boost converter. The model works fine when the switch is disconnected, or controlled using a pulse generator, but it stops working when I connect the switch to the capacitor voltage. Any idea how to fix this?
The fullwave rectifier and piezoelectric generator is mostly following the design from this example model. https://www.mathworks.com/help/sps/ug/piezo-bender-energy-harvester.html I’m building a piezoelectric generator with boost converter for my assignment and I’m trying to create a feedback loop by using the capacitor voltage to control the switch for boost converter. The model works fine when the switch is disconnected, or controlled using a pulse generator, but it stops working when I connect the switch to the capacitor voltage. Any idea how to fix this?
The fullwave rectifier and piezoelectric generator is mostly following the design from this example model. https://www.mathworks.com/help/sps/ug/piezo-bender-energy-harvester.html boost converter, piezoelectric generator, powered electronics MATLAB Answers — New Questions

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Post Content Post Content battery, simulink, simulation, vehicle, power_electronics_control, battery_system_management MATLAB Answers — New Questions

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Friends, how to distribute the torque of four motors on VCU, is there any learning material for this?Friends, how to distribute the torque of four motors on VCU, is there any learning material for this? Friends, how to distribute the torque of four motors on VCU, is there any learning material for this? four motor MATLAB Answers — New Questions

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syms x m y M %H R_c R_a p R
%—————————————————
%Initilization
%—————————————————
U=zeros(1,’sym’);
A=zeros(1,’sym’);
B=zeros(1,’sym’);
C=zeros(1,’sym’);
D=zeros(1,’sym’);
E=zeros(1,’sym’);
F=zeros(1,’sym’);
series(x)=sym(zeros(1,1));
%—————————————————
%Parameters
%—————————————————
l=0.5;
%M=0.5;
H=0.5;
R_c=0.5;
R_a=0.25;
p=0.8;
R=0.25
%—————————————————
%Initial condition
%—————————————————
U(1)=y
U(2)=0

for i=1:14
U(i+2)=m;
A(1)=0;
B(1)=0;
C(1)=0;
for j=1:i
A(1)=A(1)+U(j)*(i-j+1)*(i-j+2)*U(i-j+3);
B(1)=B(1)+j*U(j+1)*(i-j+1)*U(i-j+2);
C(1)=C(1)+U(j)*U(i-j+1);
end
variable_m=(1+4*R_c)*i*(i+1)*U(i+2)+l*A(1)+l*B(1)-R_a*C(1)-M*(1-p)*U(i)-H*U(i)-R*U(i);
variable=solve(variable_m,m);
U(i+2)=variable;
end

for k=1:6
series(x)=simplify(series(x)+U(k)*(power(x,k-1)));
end
series
e1=subs(series,x,1);
e2=e1-1
root=solve(e2,y)
var2 = vpa(root)
%%%%%%%%%%%%%%%%%%%%%%%%HOW TO FIND THE REAL ROOT %%%%%%%%%%%%%%%%%%%

series_M=subs(series, y,root(1))
Fin_efficiency=int(series_M,x,0,1)
var = vpa(Fin_efficiency)
M=0:5
row=0;
eta=zeros(length(M))
for i=1:length(M)
row=row+1
eta(row)=var(M(row))
end
plot(M,eta)
%—————————————————————————————–
the following error apper where the error remaining
Array indices must be positive integers or logical values.

Error in indexing (line 936)
R_tilde = builtin(‘subsref’,L_tilde,Idx);
But the indices are positivesyms x m y M %H R_c R_a p R
%—————————————————
%Initilization
%—————————————————
U=zeros(1,’sym’);
A=zeros(1,’sym’);
B=zeros(1,’sym’);
C=zeros(1,’sym’);
D=zeros(1,’sym’);
E=zeros(1,’sym’);
F=zeros(1,’sym’);
series(x)=sym(zeros(1,1));
%—————————————————
%Parameters
%—————————————————
l=0.5;
%M=0.5;
H=0.5;
R_c=0.5;
R_a=0.25;
p=0.8;
R=0.25
%—————————————————
%Initial condition
%—————————————————
U(1)=y
U(2)=0

for i=1:14
U(i+2)=m;
A(1)=0;
B(1)=0;
C(1)=0;
for j=1:i
A(1)=A(1)+U(j)*(i-j+1)*(i-j+2)*U(i-j+3);
B(1)=B(1)+j*U(j+1)*(i-j+1)*U(i-j+2);
C(1)=C(1)+U(j)*U(i-j+1);
end
variable_m=(1+4*R_c)*i*(i+1)*U(i+2)+l*A(1)+l*B(1)-R_a*C(1)-M*(1-p)*U(i)-H*U(i)-R*U(i);
variable=solve(variable_m,m);
U(i+2)=variable;
end

for k=1:6
series(x)=simplify(series(x)+U(k)*(power(x,k-1)));
end
series
e1=subs(series,x,1);
e2=e1-1
root=solve(e2,y)
var2 = vpa(root)
%%%%%%%%%%%%%%%%%%%%%%%%HOW TO FIND THE REAL ROOT %%%%%%%%%%%%%%%%%%%

series_M=subs(series, y,root(1))
Fin_efficiency=int(series_M,x,0,1)
var = vpa(Fin_efficiency)
M=0:5
row=0;
eta=zeros(length(M))
for i=1:length(M)
row=row+1
eta(row)=var(M(row))
end
plot(M,eta)
%—————————————————————————————–
the following error apper where the error remaining
Array indices must be positive integers or logical values.

Error in indexing (line 936)
R_tilde = builtin(‘subsref’,L_tilde,Idx);
But the indices are positive syms x m y M %H R_c R_a p R
%—————————————————
%Initilization
%—————————————————
U=zeros(1,’sym’);
A=zeros(1,’sym’);
B=zeros(1,’sym’);
C=zeros(1,’sym’);
D=zeros(1,’sym’);
E=zeros(1,’sym’);
F=zeros(1,’sym’);
series(x)=sym(zeros(1,1));
%—————————————————
%Parameters
%—————————————————
l=0.5;
%M=0.5;
H=0.5;
R_c=0.5;
R_a=0.25;
p=0.8;
R=0.25
%—————————————————
%Initial condition
%—————————————————
U(1)=y
U(2)=0

for i=1:14
U(i+2)=m;
A(1)=0;
B(1)=0;
C(1)=0;
for j=1:i
A(1)=A(1)+U(j)*(i-j+1)*(i-j+2)*U(i-j+3);
B(1)=B(1)+j*U(j+1)*(i-j+1)*U(i-j+2);
C(1)=C(1)+U(j)*U(i-j+1);
end
variable_m=(1+4*R_c)*i*(i+1)*U(i+2)+l*A(1)+l*B(1)-R_a*C(1)-M*(1-p)*U(i)-H*U(i)-R*U(i);
variable=solve(variable_m,m);
U(i+2)=variable;
end

for k=1:6
series(x)=simplify(series(x)+U(k)*(power(x,k-1)));
end
series
e1=subs(series,x,1);
e2=e1-1
root=solve(e2,y)
var2 = vpa(root)
%%%%%%%%%%%%%%%%%%%%%%%%HOW TO FIND THE REAL ROOT %%%%%%%%%%%%%%%%%%%

series_M=subs(series, y,root(1))
Fin_efficiency=int(series_M,x,0,1)
var = vpa(Fin_efficiency)
M=0:5
row=0;
eta=zeros(length(M))
for i=1:length(M)
row=row+1
eta(row)=var(M(row))
end
plot(M,eta)
%—————————————————————————————–
the following error apper where the error remaining
Array indices must be positive integers or logical values.

Error in indexing (line 936)
R_tilde = builtin(‘subsref’,L_tilde,Idx);
But the indices are positive root and index issue MATLAB Answers — New Questions

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matlab2025a和2025b在程序运行过程中出现闪退，并弹出下面这个窗口。而后我在打开matlab的时候也是刚打开就闪退，出现下面这个窗口，应该怎么解决呀？电脑重启之后有时候正常，有时候也不行，得重启好几次才行。
Matlab 2025a and 2025b experienced crashes during program execution and a window like the following popped up. Then, when I opened Matlab, it crashed immediately upon opening, and a similar window appeared. How can this be resolved? After restarting the computer, sometimes it works normally, but other times it doesn’t. It requires multiple restarts to make it work.matlab2025a和2025b在程序运行过程中出现闪退，并弹出下面这个窗口。而后我在打开matlab的时候也是刚打开就闪退，出现下面这个窗口，应该怎么解决呀？电脑重启之后有时候正常，有时候也不行，得重启好几次才行。
Matlab 2025a and 2025b experienced crashes during program execution and a window like the following popped up. Then, when I opened Matlab, it crashed immediately upon opening, and a similar window appeared. How can this be resolved? After restarting the computer, sometimes it works normally, but other times it doesn’t. It requires multiple restarts to make it work. matlab2025a和2025b在程序运行过程中出现闪退，并弹出下面这个窗口。而后我在打开matlab的时候也是刚打开就闪退，出现下面这个窗口，应该怎么解决呀？电脑重启之后有时候正常，有时候也不行，得重启好几次才行。
Matlab 2025a and 2025b experienced crashes during program execution and a window like the following popped up. Then, when I opened Matlab, it crashed immediately upon opening, and a similar window appeared. How can this be resolved? After restarting the computer, sometimes it works normally, but other times it doesn’t. It requires multiple restarts to make it work. matlab 闪退 MATLAB Answers — New Questions

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I am currently using "getkey" but it appears to include some falts. The worst one is that it stops matlab and goes to the matlab main window, however the maylab script still runs, but it is hard to use without seeing the figure of my apllication.
What alternative functions can be used instead of "getkey" ?
best regards
OleI am currently using "getkey" but it appears to include some falts. The worst one is that it stops matlab and goes to the matlab main window, however the maylab script still runs, but it is hard to use without seeing the figure of my apllication.
What alternative functions can be used instead of "getkey" ?
best regards
Ole I am currently using "getkey" but it appears to include some falts. The worst one is that it stops matlab and goes to the matlab main window, however the maylab script still runs, but it is hard to use without seeing the figure of my apllication.
What alternative functions can be used instead of "getkey" ?
best regards
Ole reading keyboard MATLAB Answers — New Questions

​

Hi all,
I’ve created a ChartContainer in MATLAB R2024b and need to track when its update routine finishes so I can restore an internal property to its original value. During setup, I added listeners for the PreUpdate and PostUpdate events of the ChartContainer.
However, when I change a property, the update method runs, but neither the PreUpdate nor PostUpdate events seem to fire.
Below I share the class implementation:
classdef TestComponent < matlab.graphics.chartcontainer.ChartContainer

%% Properties
properties (AbortSet)

% Internal use. Indicates update is required, triggered by external
% property.
TriggerUpdate (1,1) logical = false;

end %properties

properties (Transient, NonCopyable, Hidden, SetAccess = protected, UsedInUpdate = false)

% Event listener array
EventListeners (1,:) event.listener

end

%% Protected Methods
methods (Access = protected)

function setup(obj)
% Setup routine

% Show setup routine is executed
disp(‘setup’)

% Setup listeners to all events in the class
metaClass = meta.class.fromName(class(obj));
eventList = {metaClass.EventList.Name};
listenAcces = {metaClass.EventList.ListenAccess};

% Initialize listener to post-update event
for idx = 1:numel(eventList)
if ~strcmpi(listenAcces{idx}, {‘public’, ‘protected’})
continue
end
obj.EventListeners(end+1) = listener(obj, …
eventList{idx}, @(s,e) obj.showEvent(e));
end
end %function

function update(obj)
% Update routine

% Show update routine is executed
disp(‘update’)
end %function

end %methods

methods

function showEvent(obj, e)
disp(e)
end %function

end %methods
end
Does anyone know why these events aren’t triggered? For ComponentContainer, the events work as expected.Hi all,
I’ve created a ChartContainer in MATLAB R2024b and need to track when its update routine finishes so I can restore an internal property to its original value. During setup, I added listeners for the PreUpdate and PostUpdate events of the ChartContainer.
However, when I change a property, the update method runs, but neither the PreUpdate nor PostUpdate events seem to fire.
Below I share the class implementation:
classdef TestComponent < matlab.graphics.chartcontainer.ChartContainer

%% Properties
properties (AbortSet)

% Internal use. Indicates update is required, triggered by external
% property.
TriggerUpdate (1,1) logical = false;

end %properties

properties (Transient, NonCopyable, Hidden, SetAccess = protected, UsedInUpdate = false)

% Event listener array
EventListeners (1,:) event.listener

end

%% Protected Methods
methods (Access = protected)

function setup(obj)
% Setup routine

% Show setup routine is executed
disp(‘setup’)

% Setup listeners to all events in the class
metaClass = meta.class.fromName(class(obj));
eventList = {metaClass.EventList.Name};
listenAcces = {metaClass.EventList.ListenAccess};

% Initialize listener to post-update event
for idx = 1:numel(eventList)
if ~strcmpi(listenAcces{idx}, {‘public’, ‘protected’})
continue
end
obj.EventListeners(end+1) = listener(obj, …
eventList{idx}, @(s,e) obj.showEvent(e));
end
end %function

function update(obj)
% Update routine

% Show update routine is executed
disp(‘update’)
end %function

end %methods

methods

function showEvent(obj, e)
disp(e)
end %function

end %methods
end
Does anyone know why these events aren’t triggered? For ComponentContainer, the events work as expected. Hi all,
I’ve created a ChartContainer in MATLAB R2024b and need to track when its update routine finishes so I can restore an internal property to its original value. During setup, I added listeners for the PreUpdate and PostUpdate events of the ChartContainer.
However, when I change a property, the update method runs, but neither the PreUpdate nor PostUpdate events seem to fire.
Below I share the class implementation:
classdef TestComponent < matlab.graphics.chartcontainer.ChartContainer

%% Properties
properties (AbortSet)

% Internal use. Indicates update is required, triggered by external
% property.
TriggerUpdate (1,1) logical = false;

end %properties

properties (Transient, NonCopyable, Hidden, SetAccess = protected, UsedInUpdate = false)

% Event listener array
EventListeners (1,:) event.listener

end

%% Protected Methods
methods (Access = protected)

function setup(obj)
% Setup routine

% Show setup routine is executed
disp(‘setup’)

% Setup listeners to all events in the class
metaClass = meta.class.fromName(class(obj));
eventList = {metaClass.EventList.Name};
listenAcces = {metaClass.EventList.ListenAccess};

% Initialize listener to post-update event
for idx = 1:numel(eventList)
if ~strcmpi(listenAcces{idx}, {‘public’, ‘protected’})
continue
end
obj.EventListeners(end+1) = listener(obj, …
eventList{idx}, @(s,e) obj.showEvent(e));
end
end %function

function update(obj)
% Update routine

% Show update routine is executed
disp(‘update’)
end %function

end %methods

methods

function showEvent(obj, e)
disp(e)
end %function

end %methods
end
Does anyone know why these events aren’t triggered? For ComponentContainer, the events work as expected. matlab, plot, chartcontainer, update, event MATLAB Answers — New Questions

​

Hello, I encountered some problems when using Simulink to generate C code. My model is shown in Figure 1, and the model optimization configuration is shown in Figure 2. I disabled signal storage reuse but disabled local output reuse; all other settings are default.
1、If I enable reusing local outputs, it will use a local variable multiple times, which makes the code less readable. Even if I disable reusing local module outputs, some local variables are still reused. I want to improve readability but don’t want each module to output individually. How can this be resolved?
2、How should I control the generation of intermediate variables? Do I need to name all module names and signal names? Is it possible to know in advance where intermediate variable names will be generated?
3、In Figure 3, the two-dimensional lookup table I used has the same dimensions, and when generating code it will generate a shared index value called ‘pooled.’ How should this variable be controlled?
4、Currently, the lookup functions I generate for the code are placed in model.c. Can the functions generated by the lookup module be placed in a specified file?
5、Is it possible to generate a structure to control the breakpoints and table data of the lookup module? I can do this using the Struct storage class in Simulink, but the lookup data ends up appearing in model.c, which makes my model.c look messy.
6、3. In Figure 4, there is matrix multiplication in the model. I have named the intermediate signal lines and the modules before and after, so why does it still generate a tmp variable? Is this variable used for the loop operation in matrix addition?
There are corresponding file attachments at the end.Hello, I encountered some problems when using Simulink to generate C code. My model is shown in Figure 1, and the model optimization configuration is shown in Figure 2. I disabled signal storage reuse but disabled local output reuse; all other settings are default.
1、If I enable reusing local outputs, it will use a local variable multiple times, which makes the code less readable. Even if I disable reusing local module outputs, some local variables are still reused. I want to improve readability but don’t want each module to output individually. How can this be resolved?
2、How should I control the generation of intermediate variables? Do I need to name all module names and signal names? Is it possible to know in advance where intermediate variable names will be generated?
3、In Figure 3, the two-dimensional lookup table I used has the same dimensions, and when generating code it will generate a shared index value called ‘pooled.’ How should this variable be controlled?
4、Currently, the lookup functions I generate for the code are placed in model.c. Can the functions generated by the lookup module be placed in a specified file?
5、Is it possible to generate a structure to control the breakpoints and table data of the lookup module? I can do this using the Struct storage class in Simulink, but the lookup data ends up appearing in model.c, which makes my model.c look messy.
6、3. In Figure 4, there is matrix multiplication in the model. I have named the intermediate signal lines and the modules before and after, so why does it still generate a tmp variable? Is this variable used for the loop operation in matrix addition?
There are corresponding file attachments at the end. Hello, I encountered some problems when using Simulink to generate C code. My model is shown in Figure 1, and the model optimization configuration is shown in Figure 2. I disabled signal storage reuse but disabled local output reuse; all other settings are default.
1、If I enable reusing local outputs, it will use a local variable multiple times, which makes the code less readable. Even if I disable reusing local module outputs, some local variables are still reused. I want to improve readability but don’t want each module to output individually. How can this be resolved?
2、How should I control the generation of intermediate variables? Do I need to name all module names and signal names? Is it possible to know in advance where intermediate variable names will be generated?
3、In Figure 3, the two-dimensional lookup table I used has the same dimensions, and when generating code it will generate a shared index value called ‘pooled.’ How should this variable be controlled?
4、Currently, the lookup functions I generate for the code are placed in model.c. Can the functions generated by the lookup module be placed in a specified file?
5、Is it possible to generate a structure to control the breakpoints and table data of the lookup module? I can do this using the Struct storage class in Simulink, but the lookup data ends up appearing in model.c, which makes my model.c look messy.
6、3. In Figure 4, there is matrix multiplication in the model. I have named the intermediate signal lines and the modules before and after, so why does it still generate a tmp variable? Is this variable used for the loop operation in matrix addition?
There are corresponding file attachments at the end. simulink, generate code, lookuptable, embedded coder MATLAB Answers — New Questions

​

I’m a student and I’ve been trying to access Matlab online, and I’m getting an error saying, "Access Denied," which says: 403X-ERR#MHOD. It worked fine on May 7th, but it’s not working this afternoon. Is there a solution? I need it to review my university classes.I’m a student and I’ve been trying to access Matlab online, and I’m getting an error saying, "Access Denied," which says: 403X-ERR#MHOD. It worked fine on May 7th, but it’s not working this afternoon. Is there a solution? I need it to review my university classes. I’m a student and I’ve been trying to access Matlab online, and I’m getting an error saying, "Access Denied," which says: 403X-ERR#MHOD. It worked fine on May 7th, but it’s not working this afternoon. Is there a solution? I need it to review my university classes. access MATLAB Answers — New Questions

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