How do I extract the function from a piecewise defined function in Matlab?
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I'm using the new Matlab piecewise function https://www.mathworks.com/help/symbolic/piecewise.html introduced in the Symbolic Math Toolbox R2016b to define a function, and I'm trying to extract the function expression part from the whole piecewise variable. Specifically my code looks something like:
syms x;
y = piecewise(x>1,3*x^2,0);
I'd like to be able to extract just the
3*x^2
from y without the condition.
Any idea how to do that?
1 个评论
Nicolas Schmit
2017-9-1
Hello. Assume x>1 then simplify the expression.
syms x
y = piecewise(x>1,3*x^2,0);
assume (x>1);
simplify(y)
采纳的回答
Walter Roberson
2017-9-1
2 个投票
You can use children() to extract the subexpressions of a symbolic expression.
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