Answered

Very slow when change current directory.

I had this problem on 2017a. It took minutes to change directories. Then I closed some of the open files in my editor and it g...

Very slow when change current directory.

I had this problem on 2017a. It took minutes to change directories. Then I closed some of the open files in my editor and it g...

12 months ago | 0

Answered

getting actual numbers instead of symbolic results when using solve

Why do you say it doesn't work? I see your answers returned as a structure: >> vals vals = lambda: [1x1 sym] ...

getting actual numbers instead of symbolic results when using solve

Why do you say it doesn't work? I see your answers returned as a structure: >> vals vals = lambda: [1x1 sym] ...

4 years ago | 1

| accepted

Answered

Removing repeat displays in Matlab

function y = fcn(u) persistent previous_u if isempty(previous_u) previous_u=0; end if u >= 0.5 && previ...

Removing repeat displays in Matlab

function y = fcn(u) persistent previous_u if isempty(previous_u) previous_u=0; end if u >= 0.5 && previ...

4 years ago | 0

Answered

How can I modify the circuit to obtain constant power?

There is bound to be some numerical error in your simulation because you are finding a <http://en.wikipedia.org/wiki/Numerical_m...

How can I modify the circuit to obtain constant power?

There is bound to be some numerical error in your simulation because you are finding a <http://en.wikipedia.org/wiki/Numerical_m...

4 years ago | 0

Answered

Runing the simulink with different step time

Use a From Workspace block with a time series, or an array of time and signal values. There are <http://www.mathworks.com/h...

Runing the simulink with different step time

Use a From Workspace block with a time series, or an array of time and signal values. There are <http://www.mathworks.com/h...

4 years ago | 0

| accepted

Answered

How can I parametrize the "From Workspace" block in Simulink?

set_param([sys '/From workspace'],'VariableName','x1')

How can I parametrize the "From Workspace" block in Simulink?

set_param([sys '/From workspace'],'VariableName','x1')

4 years ago | 0

Answered

how do i make this pv model work

Close the circuit. You say you have a source of current, so where does that current go? Perhaps a resistor as a load?

how do i make this pv model work

Close the circuit. You say you have a source of current, so where does that current go? Perhaps a resistor as a load?

4 years ago | 0

Answered

How to use message box?

msgbox(sprintf('Failure is at %d',failure)) or maybe you would rather put it on the plot directly: annotation('textbox...

How to use message box?

msgbox(sprintf('Failure is at %d',failure)) or maybe you would rather put it on the plot directly: annotation('textbox...

4 years ago | 0

| accepted

Answered

Issues when multipling and summing very small values in a matrix

Your code as written only sums the value of the last column of _massplume_area.*constant_. Did you mean datamatrix(:, co...

Issues when multipling and summing very small values in a matrix

Your code as written only sums the value of the last column of _massplume_area.*constant_. Did you mean datamatrix(:, co...

4 years ago | 1

Answered

How to Determine the current/next Simulink TimeStep when running a simulation?

Are you looking for the <http://www.mathworks.com/help/simulink/slref/clock.html Clock> block?

How to Determine the current/next Simulink TimeStep when running a simulation?

Are you looking for the <http://www.mathworks.com/help/simulink/slref/clock.html Clock> block?

4 years ago | 1

Answered

How to exit background program using MATLAB?

It would probably be better to have your program terminate itself. However, if you are on Windows you can kill it using _taskki...

How to exit background program using MATLAB?

It would probably be better to have your program terminate itself. However, if you are on Windows you can kill it using _taskki...

4 years ago | 0

| accepted

Answered

Solving system of 5 variable

<http://www.mathworks.com/products/sysid/ System Identification Toolbox>

Solving system of 5 variable

<http://www.mathworks.com/products/sysid/ System Identification Toolbox>

4 years ago | 0

Answered

Error using quad "Error using quad (line 75) The integrand function must return an output vector of the same length as the input vector."

There are two powers in that line and you have only replaced one. @(q,n0)((eq(q)) *^* 2+2*U*n0*(eq(q))) *.^* 0.5

Error using quad "Error using quad (line 75) The integrand function must return an output vector of the same length as the input vector."

There are two powers in that line and you have only replaced one. @(q,n0)((eq(q)) *^* 2+2*U*n0*(eq(q))) *.^* 0.5

4 years ago | 0

Answered

Outputting numbers into a single array when using a double for loop?

T(n)=max(x)

Outputting numbers into a single array when using a double for loop?

T(n)=max(x)

4 years ago | 0

| accepted

Answered

How to increase count for different counters in if loop.

You are comparing the entire _itemtype_ array to the numbers 1 and 2. Perhaps you want to compare just one element of the array...

How to increase count for different counters in if loop.

You are comparing the entire _itemtype_ array to the numbers 1 and 2. Perhaps you want to compare just one element of the array...

4 years ago | 0

| accepted

Answered

Simulink interpolation using 4 different vectors

As it says, (1) use coder.extrinsic to add support for _griddata_ (2) Specifiy the size of the output data of your block....

Simulink interpolation using 4 different vectors

As it says, (1) use coder.extrinsic to add support for _griddata_ (2) Specifiy the size of the output data of your block....

4 years ago | 0

Answered

Invalid dimensions between blocks in Simulink

Do you want a 1x5 array of different random numbers, or the same 5 times? Either way, if you have u=[1x5] and Bd=[5x2], then ...

Invalid dimensions between blocks in Simulink

Do you want a 1x5 array of different random numbers, or the same 5 times? Either way, if you have u=[1x5] and Bd=[5x2], then ...

4 years ago | 0

| accepted

Answered

How to create an array of numbers in simulink?

Put rand(1,10) in your constant block.

How to create an array of numbers in simulink?

Put rand(1,10) in your constant block.

4 years ago | 0

| accepted

Answered

Derivative input 1 of 'PC_ECU_BHKW_V0_ohneNI/Motormodell_V0_1/GasolineEngine_V0_1/Lambda_Steuerung_V0_1/Lambda_Steuerung/PID Controller/Integrator' at time 0.201 is Inf or NaN. Stopping simulation. There may be a singularity in the solution. If not,

If there is not a <http://www.mathworks.com/matlabcentral/answers/99084-why-am-i-receiving-error-messages-about-singularities-...

Derivative input 1 of 'PC_ECU_BHKW_V0_ohneNI/Motormodell_V0_1/GasolineEngine_V0_1/Lambda_Steuerung_V0_1/Lambda_Steuerung/PID Controller/Integrator' at time 0.201 is Inf or NaN. Stopping simulation. There may be a singularity in the solution. If not,

If there is not a <http://www.mathworks.com/matlabcentral/answers/99084-why-am-i-receiving-error-messages-about-singularities-...

4 years ago | 0

Answered

The simulink simulation slows down when I use a switch, it does not give any error but it stays at .5 second indifinitely!

You have not <http://www.mathworks.com/help/simulink/ug/choosing-a-solver.html chosen the correct solver> for your application....

The simulink simulation slows down when I use a switch, it does not give any error but it stays at .5 second indifinitely!

You have not <http://www.mathworks.com/help/simulink/ug/choosing-a-solver.html chosen the correct solver> for your application....

4 years ago | 0

Answered

Power system reliability with renewable DGs

For Simulink, take a look at <http://www.mathworks.com/products/simpower/ SimPowerSystems>. However, I think non-Mathworks pr...

Power system reliability with renewable DGs

For Simulink, take a look at <http://www.mathworks.com/products/simpower/ SimPowerSystems>. However, I think non-Mathworks pr...

4 years ago | 0

Answered

Crash of a single case terminates the whole optimization process

You can use a <http://www.mathworks.com/help/matlab/matlab_prog/use-trycatch-to-handle-errors.html try block> around your code. ...

Crash of a single case terminates the whole optimization process

You can use a <http://www.mathworks.com/help/matlab/matlab_prog/use-trycatch-to-handle-errors.html try block> around your code. ...

4 years ago | 1

| accepted

Answered

Major confusion for loops - precision not acquired

Play around with _vpa()_ and _digits()_ and make sure to read the help files on <http://www.mathworks.com/help/symbolic/precisio...

Major confusion for loops - precision not acquired

Play around with _vpa()_ and _digits()_ and make sure to read the help files on <http://www.mathworks.com/help/symbolic/precisio...

4 years ago | 0

Answered

Why does this matrix have zeros for all but one of the numbers?

Be careful with <http://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html scalar and vector operations>....

Why does this matrix have zeros for all but one of the numbers?

Be careful with <http://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html scalar and vector operations>....

4 years ago | 1

| accepted

Answered

When will the Student version of Matlab 2014b or 2015a be out?

I would guess you will see 2015a in a month or so. See also <http://www.mathworks.com/matlabcentral/answers/169121-is-there...

When will the Student version of Matlab 2014b or 2015a be out?

I would guess you will see 2015a in a month or so. See also <http://www.mathworks.com/matlabcentral/answers/169121-is-there...

4 years ago | 0

| accepted

Answered

please help me I want to import data to wok space and export data from work space during simulation in the same model ?

<</matlabcentral/answers/uploaded_files/24787/Capture6.JPG>>

please help me I want to import data to wok space and export data from work space during simulation in the same model ?

<</matlabcentral/answers/uploaded_files/24787/Capture6.JPG>>

4 years ago | 0

Answered

solve equation for variable and how to get output as number not as substituted form

x1=rand(1); y1=rand(1); r = 10; v1= 2*rand(1); v2= 2*rand(1); syms t eq=(x1+t*v1)^2+(y1+t*v1)^2-r^2; ...

solve equation for variable and how to get output as number not as substituted form

x1=rand(1); y1=rand(1); r = 10; v1= 2*rand(1); v2= 2*rand(1); syms t eq=(x1+t*v1)^2+(y1+t*v1)^2-r^2; ...

4 years ago | 0

| accepted

Answered

I have only non-linear eqality constraints

Did you try making it empty? For example: function [c,ceq]=nonLinearConstraints(x) c=[]; ceq=...

I have only non-linear eqality constraints

Did you try making it empty? For example: function [c,ceq]=nonLinearConstraints(x) c=[]; ceq=...

4 years ago | 1