I Have problems with the function ss2tf, matlab say me: Undefined function 'max' for input arguments of type 'sym'.
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I want obtain the transfer function with the matrix A,B,C,D but I have problems. I don´t know if this problem is by my matlab R2013a, because in other matlab version 2011 works well. Thanks
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Arkadiy Turevskiy
le 7 Juil 2014
The first problem with your code is that A,B,C,and D matrices are symbolic, but you re trying to use ss2tf function that works on numeric matrices.
If you don't mind the loss of symbolic nature of your matrices, you can convert them to numeric:
A=double(A);
B=double(B);
C=double(C);
D=double(D);
Then your calculations should work
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