Having trouble creating a conditional function

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Michael Bettar
Michael Bettar 2017-10-17
评论： Walter Roberson 2017-10-17
Hi it's my first time posting here
I am trying to create a conditional function
x = -1:0.1:1;
f = x.^2.*sin(pi.*x);
So the conditions are
if f>=0
g = f
elseif f<0
g = 0
I have tried to create separate vectors containing the index that give positive respespective negative values of f and then create an if statement that looked something like this
if f == f(a)
g = f(a)
%where a is the index that give positive values
elseif f == f(b)
g = 0
end
but it doesn't seem to work at all
what am I doing wrong?

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回答（1 个）

KL
KL 2017-10-17
编辑：KL 2017-10-17
Just use
x = -1:0.1:1;
f = x.^2.*sin(pi.*x);
and then to create g based on f
g = f;
g(g<0)=0;

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