how to create a changing variable for fsolve?
Asked by Hana on 6 Jul 2012
Latest activity Commented on by Hana on 8 Jul 2012
i want fsolve to calculate the output for different uc each time (increasing uc by 0.001 each time). each output from fsolve should be sent to a simulink model seperatly. so i set a loop to do so, but i believe that at the currenty constellation (if it will work)will just calculate 1000 different values? is there a way to send out the values seperately?
if not, how can i create a parameter uc. that goes from 0 to say 1000? i tried uc=0:0.1:1000, but again, the demension doen't seem to fit.
how do i create a function that takes the next element of a vector/matrix each time the function is called?
best regards
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1 Answer
Answer by Walter Roberson on 6 Jul 2012
Edited by Walter Roberson on 6 Jul 2012
Accepted answer
function Result = f(YourArray) persistent iteration_number if isempty(iteration_number); iteration_number = 0; end iteration_number = iteration_number + 1; if iteration_number > numel(YourArray); Result = []; iteration_number = []; %reset for next cycle return; end Result = some expression in YourArray(iteration_number) end
Please also read the documentation for fsolve() as you cannot pass in parameters the way you do. Please see the section about parameterizing the function.
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Hana on 6 Jul 2012
i think i understood the method you are suggesting, but i'm having trouble realizing it. i found the function-call-generator in simulink, but i'm not sure how to call the fsolve from there, since i can't write the fsolve into the matlab function directy and coder.extrinsic only calls functions and not scripts...
Walter Roberson on 6 Jul 2012
Write a Level 2 S function if necessary.
There is a lot about Simulink that I have not put together mentally yet, as I do not have access to it myself.
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