Matlab 2012a subs() BUG?
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I have function that is a sum of multiple sinusoidal functions. It is x(t).
I try to first do time shift, no problem:
syms x;
syms t;
%define x, some long sinusoidal function
r1 = subs(x,t,t-1)
Everything up to here runs fine. Next I want to evaluate the shifted function.
subs(r1, t, 0)
Now after this step above the result is NaN Result should be 1, by plotting...
3 个评论
Walter Roberson
2013-3-15
Please show r1
NaN could show up if the expression is singular at t=0
ha9981
2013-3-15
NaN shows up for r1 and r2 when evaluating at any integer value! Figure below.
Walter Roberson
2013-3-15
Okay, but you have not indicated what r1 or r2 are
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