MATLAB: Simulink &m-file

simulink

i have m-file code and a simulink model can i convert m-file code to block in simulink which i can make its input port a sinusoidal signal and its output port frequency of this signal m-file code: {%x input signal and fre output y=fft(x)/fs; y=fftshift(y); y=abs(y); fre=.5*fs+1-find(y==max(y),1);}

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See the first line in my answer here: http://www.mathworks.se/matlabcentral/answers/26682-linking-simulink-from-m-file

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MATLAB: Simulinke with m-file

You can run Simulink from the matlab prompt or from within a script using the sim command, and pass the simulation output back to the workspace. For example,

simOut = sim('myModel') ;

See this tutorial and 'Communication between the Matlab’s Command window/workspace and Simulink’s Model window' in this tutorial. In Matlab, you can then calculate the frequency of the output signal.

MATLAB: M-file function

Your function is calling itself without approaching any convergance or something that will allow it to end. Therefore it will run forever and eventually out of memory (hence the error). Try splitting it up into a script and a function as so:

Script:

 %creating window of plot from -5 to 50 using stepsize 0.25 for t x-axis
 %t should be on the x axis, v should be on the y axis
 k=0; 
for i= -5:.25:50
    k = k+1;
    t(k)=i;
    v(k)=vPieceWise(t(k));
end 
plot(t,v);
 
figure
plot(t,v);
hold on

Function:

%Part A: Mfile function to compute v as a function of t
function v = vPieceWise(t)
 if (t < 0)
        v = 0;
    elseif (0 <= t)&&(8<=16)
        v = -5*t+10*t.^2;
    elseif (8<=16)&&(t<=16)
        v = 624 - 3*t;
    elseif (t<=16)&&(t<=26)
        v = 12*(t-16).^2+36*t;
    elseif (26<t)
        v = 2136*exp(-0.1*(t-26));
 end

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Related Solutions

MATLAB: Simulinke with m-file

MATLAB: M-file function

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