not able to subtract two discrete signals

close all
clear all
n=-2:2
x(n~=0)=0
x(n==0)=1
subplot(3,1,1)
stem(n,x)
w(n~=2)=0
w(n==2)=1
subplot(3,1,2)
stem(n,w)
y=x-n
subplot(3,1,3)
stem(n,y)

Answer 1

[Star Strider]

I’m not certain that I understand what you are doing, but perhaps changing the ‘y’ assignment to:

y=x-w;

is what you want.

[irtaza anwar]

i am trying to plot &[n]-&[n-2]

[Star Strider]

I believe that if you change your code to recalculate ‘y’ as I suggested, you will have what you want. You are subtracting two impulses separated in time by 2 time units, so the first one at n=0 will be plotted a +1 and the one at n=2 will be plotted as -1.

[irtaza anwar]

thanks a lot

[Star Strider]

My pleasure!