Plotting Signals in matlab

I am still new to matlab and I am facing many errors sketching these problems help please.

2- X(t)=(t+1)u(t-1)-tu(t)-u(t-2) …… for -1≤t≤3

3- X(t)=e-t u(t) – e t-4 u(t-4) …… for -1≤t≤6

4- X[n]=u[n] -2u[n-1] + u[n-4] …… for -3≤n≤8

5- X[n]=δ[n+1]-δ[n]+u[n+1]-u[n-2] ……. for -3≤n≤4

Answer 1

[Star Strider]

One option is to use the Symbolic Math Toolbox and go from there.

Example —

syms t 
u(t) = heaviside(t);
X(t)=(t+1)*u(t-1)-t*u(t)-u(t-2)

X(t) = 

figure
fplot(X, [-1 3])
grid
ylim(1.5*ylim)

That only required copying and pasting the function and adding some necessary multiplication operators before plotting it.

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[Ahmed Mohamed]

well that worked fine for continous signals and I appreciate it but I still need help for discrete ones (4,5) thanks in advance

[Walter Roberson]

T = -3:8;
Y = X(T)
stem(T, Y)

[Star Strider]

@Ahmed Mohamed — As always, my pleasure!

@Walter Roberson — Thank you!

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