matlab: subs on symbolic constant returns scalar instead of vector for a vector input
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Published on 2010-06-05T23:26:11Z
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2010/06/05
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usually, symbolic functions return vectors for vector inputs:
syms('x');
f=x*2;
subs(f,[1 2 3])
outputs: [2 4 6]
but doing
f=sym('0');
subs(f,[1 2 3]);
outputs: 0
and not: [0 0 0]
so basically, my questions is how do I make f behave as a "normal" symbolic function.
I can do something ugly like f=x-x to create a function that always returns zero, but is there a prettier way?
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