How to write delta in matlab?

x2[n]= 2delta[n] - u[n - 1] + u[n - 3]

How to I type this in matlab? Like what is the syntax for delta in matlab?

[Image Analyst]

What's the context?

TUTORIAL: how to ask a question (on Answers) and get a fast answer - MATLAB Answers - MATLAB Central

[SZ N]

Like in this question. How do i tyoe it in matlab? It is givig me an error while typing delta.

The error:

[Ragab]

\delta(t)

Answer 1

[madhan ravi]

https://www.mathworks.com/help/symbolic/sym.dirac.html

Answer 2

[Walter Roberson]

Like what is the syntax for delta in matlab?

MATLAB does not have the delta operator. The suggested dirac() does not work for this purpose:

n = [-1 0 1]

n = 1×3

-1 0 1

dirac(n)

ans = 1×3

0 Inf 0

dirac(sym(n))

ans = 

but your delta function should be 1 at parameter 0.

You need to define it yourself, such as

delta = @(x) double(x==0);

delta(n)

ans = 1×3

0 1 0