MATLAB: (‘tf’ requires one of the following) “tf commend is not working” HELP PLS!

"tf" "transfer function" "not working"MATLAB

this simple command doesn't work even though I've entered all commands correctly

thx for answers…

Best Answer

Your code is right, but you do not have the required toolbox. The function tf is part of the 4 toolbox listed in the error message. You have to install at least one of them to use tf.

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MATLAB: How to round off the coefficients of sys2 polynomial(num/den)

Hi sadel, I see another hard question :)

num=[1 0 0];
den=[1 0 0 1];
sys=tf(num,den);
sysd=c2d(sys,0.3);
sys2=d2c(sysd);
[num,den] = tfdata(sys2); 
num=round(num{:});
den=round(den{:});
sys2simple=tf(num,den)

Be carefull, in your example this code works well enough but please read the documentation about the round function!!!!!

Also take a look at round2

MATLAB: Transfer function

if you want to try simulate the response of that transfer function with step or ramp function, you can try defining that TF with 'tf' command and then using 'step' for response plot.

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Related Solutions

MATLAB: How to round off the coefficients of sys2 polynomial(num/den)

MATLAB: Transfer function

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