undefined function 'piecewise' for input arguments of type 'double'.
15 views (last 30 days)
Show older comments
I am trying to run the following piecewise function:
x = @(y) piecewise([y>2, 1], 0)
However, whenever I try to run it, I get the following error: "undefined function 'piecewise' for input arguments of type 'double'."
I definitely have the Symbolic Math toolbox installed and am not sure why this is happening.
0 Comments
Answers (1)
Thiago Henrique Gomes Lobato
on 23 Feb 2020
piecewise defines a symbolic function, so you can't just give a double as input for the anonymous function. If you however explicitely make the substitution it will work
syms y
x = @(y) piecewise(y>2,1, 0);
subs(x,[1,2,3])
ans =
[ 0, 0, 1]
Although unless you really need it to be symbolic I would strongely recommend to remain working with numerical values:
x = @(y) double(y>2);
x([1,2,3])
ans =
0 0 1
0 Comments
See Also
Categories
Find more on Assumptions in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!