Hello,
When updating the channel feed the TCP connection is terminated by the Thingspeak server immediately after each request (doesn’t matter "bad" or "good").
That behavior does not depend on the method I use (reqests from ESP8266 via WiFi, GPRS, ordinary terminal program under Windows etc.)
Is that normal?
From technical point of view this is not a problem but when using GPRS the service provider charges me for 100kB of data each time the new TCP connection is open (even if seding 100 bytes) so I suspect it would be better (cheaper) to keep the connection open between the reqests.

Thank you in advance for any advice.Hello,
When updating the channel feed the TCP connection is terminated by the Thingspeak server immediately after each request (doesn’t matter "bad" or "good").
That behavior does not depend on the method I use (reqests from ESP8266 via WiFi, GPRS, ordinary terminal program under Windows etc.)
Is that normal?
From technical point of view this is not a problem but when using GPRS the service provider charges me for 100kB of data each time the new TCP connection is open (even if seding 100 bytes) so I suspect it would be better (cheaper) to keep the connection open between the reqests.

Thank you in advance for any advice. Hello,
When updating the channel feed the TCP connection is terminated by the Thingspeak server immediately after each request (doesn’t matter "bad" or "good").
That behavior does not depend on the method I use (reqests from ESP8266 via WiFi, GPRS, ordinary terminal program under Windows etc.)
Is that normal?
From technical point of view this is not a problem but when using GPRS the service provider charges me for 100kB of data each time the new TCP connection is open (even if seding 100 bytes) so I suspect it would be better (cheaper) to keep the connection open between the reqests.

Thank you in advance for any advice. tcp, disconnection MATLAB Answers — New Questions

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I just installed a trial version of matlab 2015b and I need to add the Autosar package. I just download it and now trying to install it but I get this error from the Support package installer "Unable to load support package information. This may be duw to network problemas. Verify your network connection and retry the support package installation. If the problem persist, contact MathWorks technical support"
I check my network and I have good connection and speed. I alredy did around 20 retries but the issue persist. I noticed that other users experiences the same issue, one of them said retrying fix the problem, but that is not working for me.I just installed a trial version of matlab 2015b and I need to add the Autosar package. I just download it and now trying to install it but I get this error from the Support package installer "Unable to load support package information. This may be duw to network problemas. Verify your network connection and retry the support package installation. If the problem persist, contact MathWorks technical support"
I check my network and I have good connection and speed. I alredy did around 20 retries but the issue persist. I noticed that other users experiences the same issue, one of them said retrying fix the problem, but that is not working for me. I just installed a trial version of matlab 2015b and I need to add the Autosar package. I just download it and now trying to install it but I get this error from the Support package installer "Unable to load support package information. This may be duw to network problemas. Verify your network connection and retry the support package installation. If the problem persist, contact MathWorks technical support"
I check my network and I have good connection and speed. I alredy did around 20 retries but the issue persist. I noticed that other users experiences the same issue, one of them said retrying fix the problem, but that is not working for me. autosar, package installation MATLAB Answers — New Questions

​

Hello all,
Currently I have a Simulink customed block (named as Teq block) for my own project which was built in s-function for simulation and tlc for code generation. Because of some reasons on algorithm, I have to find a way to get the value of a Simulink.Parameter(another block) via my Teq_sf.tlc file. However, my tlc file can only get the name of Simulink.Parameter instead of its value as my expectation.
I tried to define a mdlRTW function in sf.c file and call this input to tlc file via RTW, as followings:
static void mdlRTW(SimStruct *S) % in sf.c file
{
real64 *u1 = (real64 *) ssGetInputPortSignal(S, 0);
if (!ssWriteRTWParamSettings( S, 1, SSWRITE_VALUE_QSTR, "Input_Value", *u1))
{
ssSetErrorStatus(S,"Error writing parameter data to .rtw file");
return;
}
}
and %assign input_value = SFcnParamSettings.Input_Value (in tlc)
However, this way did not work because system can not understand SFcnParamSettings. Currently, this is the big blocker for my progress.
Do you know any valid solutions which I can get a value of Simulink.Parameter into my Teq_sf.tlc file but not the name?
Thank you in advance!Hello all,
Currently I have a Simulink customed block (named as Teq block) for my own project which was built in s-function for simulation and tlc for code generation. Because of some reasons on algorithm, I have to find a way to get the value of a Simulink.Parameter(another block) via my Teq_sf.tlc file. However, my tlc file can only get the name of Simulink.Parameter instead of its value as my expectation.
I tried to define a mdlRTW function in sf.c file and call this input to tlc file via RTW, as followings:
static void mdlRTW(SimStruct *S) % in sf.c file
{
real64 *u1 = (real64 *) ssGetInputPortSignal(S, 0);
if (!ssWriteRTWParamSettings( S, 1, SSWRITE_VALUE_QSTR, "Input_Value", *u1))
{
ssSetErrorStatus(S,"Error writing parameter data to .rtw file");
return;
}
}
and %assign input_value = SFcnParamSettings.Input_Value (in tlc)
However, this way did not work because system can not understand SFcnParamSettings. Currently, this is the big blocker for my progress.
Do you know any valid solutions which I can get a value of Simulink.Parameter into my Teq_sf.tlc file but not the name?
Thank you in advance! Hello all,
Currently I have a Simulink customed block (named as Teq block) for my own project which was built in s-function for simulation and tlc for code generation. Because of some reasons on algorithm, I have to find a way to get the value of a Simulink.Parameter(another block) via my Teq_sf.tlc file. However, my tlc file can only get the name of Simulink.Parameter instead of its value as my expectation.
I tried to define a mdlRTW function in sf.c file and call this input to tlc file via RTW, as followings:
static void mdlRTW(SimStruct *S) % in sf.c file
{
real64 *u1 = (real64 *) ssGetInputPortSignal(S, 0);
if (!ssWriteRTWParamSettings( S, 1, SSWRITE_VALUE_QSTR, "Input_Value", *u1))
{
ssSetErrorStatus(S,"Error writing parameter data to .rtw file");
return;
}
}
and %assign input_value = SFcnParamSettings.Input_Value (in tlc)
However, this way did not work because system can not understand SFcnParamSettings. Currently, this is the big blocker for my progress.
Do you know any valid solutions which I can get a value of Simulink.Parameter into my Teq_sf.tlc file but not the name?
Thank you in advance! matlab, simulink, s-function, tlc MATLAB Answers — New Questions

​

Hello All,
I have velodyne lidar data in .pcap format. How to convert .pcap data into ply file?Hello All,
I have velodyne lidar data in .pcap format. How to convert .pcap data into ply file? Hello All,
I have velodyne lidar data in .pcap format. How to convert .pcap data into ply file? 3d, lidar, pointcloud, 3dobject, lidar_data MATLAB Answers — New Questions

​

Hello everyone,
I’m currently working with the bnlssm package in MATLAB to model a nonlinear state-space system. My goal is to include explanatory variables in the state equation, but I’m encountering some challenges and need your help.
Specifically, I want to modify the state equation to include external explanatory variables , such as:

In this setup:
• is the state variable.
• is an explanatory variable (could be a vector or scalar).
• represents the influence of the explanatory variable on the state dynamics.

My Questions:
1. Does the bnlssm package support incorporating explanatory variables directly into the state equation?
2. If it does, are there any specific examples or documentation that demonstrate how to achieve this?
3. If not, is there a recommended workaround for including explanatory variables, such as extending the state vector or using another approach?Hello everyone,
I’m currently working with the bnlssm package in MATLAB to model a nonlinear state-space system. My goal is to include explanatory variables in the state equation, but I’m encountering some challenges and need your help.
Specifically, I want to modify the state equation to include external explanatory variables , such as:

In this setup:
• is the state variable.
• is an explanatory variable (could be a vector or scalar).
• represents the influence of the explanatory variable on the state dynamics.

My Questions:
1. Does the bnlssm package support incorporating explanatory variables directly into the state equation?
2. If it does, are there any specific examples or documentation that demonstrate how to achieve this?
3. If not, is there a recommended workaround for including explanatory variables, such as extending the state vector or using another approach? Hello everyone,
I’m currently working with the bnlssm package in MATLAB to model a nonlinear state-space system. My goal is to include explanatory variables in the state equation, but I’m encountering some challenges and need your help.
Specifically, I want to modify the state equation to include external explanatory variables , such as:

In this setup:
• is the state variable.
• is an explanatory variable (could be a vector or scalar).
• represents the influence of the explanatory variable on the state dynamics.

My Questions:
1. Does the bnlssm package support incorporating explanatory variables directly into the state equation?
2. If it does, are there any specific examples or documentation that demonstrate how to achieve this?
3. If not, is there a recommended workaround for including explanatory variables, such as extending the state vector or using another approach? state space model, state equation, bnlssm package MATLAB Answers — New Questions

​

Hello Everyone
My question is it is possible to simulate and perform communication between multiple UAV in lunar environment using MATLAB and SIMULINK. If yes, which toolbox we need to use.

Thank you in advance.Hello Everyone
My question is it is possible to simulate and perform communication between multiple UAV in lunar environment using MATLAB and SIMULINK. If yes, which toolbox we need to use.

Thank you in advance. Hello Everyone
My question is it is possible to simulate and perform communication between multiple UAV in lunar environment using MATLAB and SIMULINK. If yes, which toolbox we need to use.

Thank you in advance. uav, lunar, simulink MATLAB Answers — New Questions

​

Hello,

My program is giving the right solution for the problem, but I believe it is doing unecessary steps. For a problem with initial point at [4 6], my code using conjugate method is doing more steps than when I try to solve the same problem using the steepest descent method.

-> Main function:

function [x_opt,f_opt,k] = conjugate_gradient (fob,g_fob,x0,tol_grad);

c0 = feval(g_fob,x0); % evaluate gradient at initial point

k = 0;

if norm(c0) < tol_grad

x_opt = x0; % optimum point
f_opt = feval(fob,x_opt); % cost function value
else
d0= -c0; % search direction
alfa0 = equal_interval_line_search(x0,d0,fob,0.5,1e-6); %line search (step size)
x1= x0+ alfa0*d0;
c1 = feval(g_fob,x1);

while norm(c1) > tol_grad
beta = (norm(c1)/norm(c0))^2;
d1= -c1+beta*d0;
alfa1 = equal_interval_line_search(x1,d1,fob,0.5,1e-6);
x2= x1+alfa1*d1;
c0=c1;
c1= feval(g_fob,x2);
d0=d1;
x1=x2;
k=k+1;
end
x_opt = x1;
f_opt = feval(fob,x_opt);
end

Cost function:

function f = fob_8_58(x);

f = 8*x(1)^2 + 8*x(2)^2 – 80*((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5*x(1)-5*x(2);

->Gradient fuction:

function g = grad_fob_8_58(x)

g(1) = 16*x(1) – 80*x(1)/((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*x(1)/((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5;

g(2) =16*x(2) – 80*(x(2)-10)/((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*(x(2)+10)/((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5;Hello,

My program is giving the right solution for the problem, but I believe it is doing unecessary steps. For a problem with initial point at [4 6], my code using conjugate method is doing more steps than when I try to solve the same problem using the steepest descent method.

-> Main function:

function [x_opt,f_opt,k] = conjugate_gradient (fob,g_fob,x0,tol_grad);

c0 = feval(g_fob,x0); % evaluate gradient at initial point

k = 0;

if norm(c0) < tol_grad

x_opt = x0; % optimum point
f_opt = feval(fob,x_opt); % cost function value
else
d0= -c0; % search direction
alfa0 = equal_interval_line_search(x0,d0,fob,0.5,1e-6); %line search (step size)
x1= x0+ alfa0*d0;
c1 = feval(g_fob,x1);

while norm(c1) > tol_grad
beta = (norm(c1)/norm(c0))^2;
d1= -c1+beta*d0;
alfa1 = equal_interval_line_search(x1,d1,fob,0.5,1e-6);
x2= x1+alfa1*d1;
c0=c1;
c1= feval(g_fob,x2);
d0=d1;
x1=x2;
k=k+1;
end
x_opt = x1;
f_opt = feval(fob,x_opt);
end

Cost function:

function f = fob_8_58(x);

f = 8*x(1)^2 + 8*x(2)^2 – 80*((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5*x(1)-5*x(2);

->Gradient fuction:

function g = grad_fob_8_58(x)

g(1) = 16*x(1) – 80*x(1)/((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*x(1)/((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5;

g(2) =16*x(2) – 80*(x(2)-10)/((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*(x(2)+10)/((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5; Hello,

My program is giving the right solution for the problem, but I believe it is doing unecessary steps. For a problem with initial point at [4 6], my code using conjugate method is doing more steps than when I try to solve the same problem using the steepest descent method.

-> Main function:

function [x_opt,f_opt,k] = conjugate_gradient (fob,g_fob,x0,tol_grad);

c0 = feval(g_fob,x0); % evaluate gradient at initial point

k = 0;

if norm(c0) < tol_grad

x_opt = x0; % optimum point
f_opt = feval(fob,x_opt); % cost function value
else
d0= -c0; % search direction
alfa0 = equal_interval_line_search(x0,d0,fob,0.5,1e-6); %line search (step size)
x1= x0+ alfa0*d0;
c1 = feval(g_fob,x1);

while norm(c1) > tol_grad
beta = (norm(c1)/norm(c0))^2;
d1= -c1+beta*d0;
alfa1 = equal_interval_line_search(x1,d1,fob,0.5,1e-6);
x2= x1+alfa1*d1;
c0=c1;
c1= feval(g_fob,x2);
d0=d1;
x1=x2;
k=k+1;
end
x_opt = x1;
f_opt = feval(fob,x_opt);
end

Cost function:

function f = fob_8_58(x);

f = 8*x(1)^2 + 8*x(2)^2 – 80*((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5*x(1)-5*x(2);

->Gradient fuction:

function g = grad_fob_8_58(x)

g(1) = 16*x(1) – 80*x(1)/((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*x(1)/((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5;

g(2) =16*x(2) – 80*(x(2)-10)/((x(1)^2+x(2)^2-20*x(2)+100)^0.5)- 80*(x(2)+10)/((x(1)^2+x(2)^2+20*x(2)+100)^0.5)-5; optimization, conjugate method, fletcher reeves MATLAB Answers — New Questions

​

I want to create a custom Simulink Test report that includes the summary and coverage tables at the end of each section as shown in the Test Manager results.

Could you advise me on how I can do this?I want to create a custom Simulink Test report that includes the summary and coverage tables at the end of each section as shown in the Test Manager results.

Could you advise me on how I can do this? I want to create a custom Simulink Test report that includes the summary and coverage tables at the end of each section as shown in the Test Manager results.

Could you advise me on how I can do this? results, coverage, report, test, manager, custom MATLAB Answers — New Questions

​

Hello , I want to simulate the following partial equation on simulink , but I dont know if what I already built is fine , I have some struggle with dc/dz ,because it gives me error when I try to build it , so I conected rate transition and discrete derivative ,but dont know it is ok . I am building a fixed bed reactor full loaded with carbon absorbed gold in which a cyanide flow is pumped into and absorbs the gold loading , depleting the carbon . Following the equations:

So i tried finite differences for dc/dz with forward difference for eactor entry , central along the reactor , and backward in the exit, and dc/dt and dq/dt use integrator blocks, I consider Co= 0 and q0=4320. The problem is that when I remove rate transition and discrete derivative in 4th reactor,gives error.
Being that said, is correct to represent dc/dz as following? :
Adjoint the simulink file down here and thanks in advance:
https://riveril123.quickconnect.to/d/s/11jhifsXc7WjjbgDgYlqicG8JX9cxHGm/1KbHfeBHUy1vF0hiTKBsPaD8Nff4HGwg-27UAduxX-QsHello , I want to simulate the following partial equation on simulink , but I dont know if what I already built is fine , I have some struggle with dc/dz ,because it gives me error when I try to build it , so I conected rate transition and discrete derivative ,but dont know it is ok . I am building a fixed bed reactor full loaded with carbon absorbed gold in which a cyanide flow is pumped into and absorbs the gold loading , depleting the carbon . Following the equations:

So i tried finite differences for dc/dz with forward difference for eactor entry , central along the reactor , and backward in the exit, and dc/dt and dq/dt use integrator blocks, I consider Co= 0 and q0=4320. The problem is that when I remove rate transition and discrete derivative in 4th reactor,gives error.
Being that said, is correct to represent dc/dz as following? :
Adjoint the simulink file down here and thanks in advance:
https://riveril123.quickconnect.to/d/s/11jhifsXc7WjjbgDgYlqicG8JX9cxHGm/1KbHfeBHUy1vF0hiTKBsPaD8Nff4HGwg-27UAduxX-Qs Hello , I want to simulate the following partial equation on simulink , but I dont know if what I already built is fine , I have some struggle with dc/dz ,because it gives me error when I try to build it , so I conected rate transition and discrete derivative ,but dont know it is ok . I am building a fixed bed reactor full loaded with carbon absorbed gold in which a cyanide flow is pumped into and absorbs the gold loading , depleting the carbon . Following the equations:

So i tried finite differences for dc/dz with forward difference for eactor entry , central along the reactor , and backward in the exit, and dc/dt and dq/dt use integrator blocks, I consider Co= 0 and q0=4320. The problem is that when I remove rate transition and discrete derivative in 4th reactor,gives error.
Being that said, is correct to represent dc/dz as following? :
Adjoint the simulink file down here and thanks in advance:
https://riveril123.quickconnect.to/d/s/11jhifsXc7WjjbgDgYlqicG8JX9cxHGm/1KbHfeBHUy1vF0hiTKBsPaD8Nff4HGwg-27UAduxX-Qs simulink, reactor, partial differential equation MATLAB Answers — New Questions

​

Hi all,

I am building a PWM generator and boost converter diagram. When i vary the input (Duty Cycle) to the PWM Generator, it should control my IGBT switch that is part of my boost converter. However, i tried varying my duty cycle and the output to my boost converter remained the same.

I would appreciate if someone can help me and explain what went wrong by taking a look at the schematic attached below.

Thank you in advance!

<</matlabcentral/answers/uploaded_files/46998/Capture.PNG>>Hi all,

I am building a PWM generator and boost converter diagram. When i vary the input (Duty Cycle) to the PWM Generator, it should control my IGBT switch that is part of my boost converter. However, i tried varying my duty cycle and the output to my boost converter remained the same.

I would appreciate if someone can help me and explain what went wrong by taking a look at the schematic attached below.

Thank you in advance!

<</matlabcentral/answers/uploaded_files/46998/Capture.PNG>> Hi all,

I am building a PWM generator and boost converter diagram. When i vary the input (Duty Cycle) to the PWM Generator, it should control my IGBT switch that is part of my boost converter. However, i tried varying my duty cycle and the output to my boost converter remained the same.

I would appreciate if someone can help me and explain what went wrong by taking a look at the schematic attached below.

Thank you in advance!

<</matlabcentral/answers/uploaded_files/46998/Capture.PNG>> pwm, simulink, boost converter, power_electronics_control, electric_motor_control, power_conversion_control MATLAB Answers — New Questions

​