Plotting discrete piecewise funtion

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Patrick Struszczyk
Patrick Struszczyk 2020-10-16
评论： Patrick Struszczyk 2020-10-16
I have a piecewise function as follows:
f(t) = 0 for t < 0
t for 0 ≤ t < 1
and e −t+1 for t ≥ 1
I'm attempting to sketch x[k]=f(0.5k) with k being counting numbers.
x2=piecewise(t<0,0,0<=t<1,t,exp(-t+1));
x3=x2.*(2.*k);
subplot (4,1,4)
stem(x3)
title('3b.3')
  1 个评论
Patrick Struszczyk
Patrick Struszczyk 2020-10-16
I keep getting the error :
Error using stem (line 40)
Unable to convert expression into double array.
How can I fix this?

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回答（1 个）

Asad (Mehrzad) Khoddam
编辑：Asad (Mehrzad) Khoddam 2020-10-16
piecewise function is for symbolic toolbox.
You can use:
t=0:0.1:5.0;
f= t.*(t>=0 & t<1 ) + exp(-t+1).*(t>=1);
plot(t,f);

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