Matlab AND operation concerning intervals

Question

0 个投票

I am trying to create a simple signal with the following code:

function s = r_tri(t)
if ((t >= 0) & (t <= 3))
  s = (-2/3)*t + 2;
else
  s = 0;
end

Every time I try and plot this I get a blank graph. I assigned t = -1: 0.01: 4; I used the following plot command:

plot (t, r_tri(t))

I also tried this on the command line, and I keep getting 0. Why is this happening? Can you suggest a better way to accomplish this? Thanks.

0 个评论
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Answer 1

Walter Roberson 2016-4-2

2 个投票

function s = r_tri(t)
s = zeros(size(t));
mask = (t >= 0) & (t <= 3);
s(mask) = (-2/3)*t(mask) + 2;

Aaron Friedman 2016-4-3

Thank you.

Answer 2

Azzi Abdelmalek 2016-4-2

1 个投票

t = -1: 0.01: 4;
s=zeros(size(t))
idx=t>=0 & t<=3;
s(idx)=(-2/3)*t(idx) + 2;
plot(t,s)

Aaron Friedman 2016-4-3

Thanks!