code of z transform for kroneckerDelta

I want to find z transfrom for kroneckerDelta using the follwoing code , I'm using MATLAB R2013a

syms n 
x(n)=kroneckerDelta(n-1,0)
d=ztrans(x(n))

but this message appear

Error using sym/subsindex (line 1558)
Indexing input must be numeric, logical or ':'.

Error in sym>privformat (line 2357)
    x = subsindex(x)+1;

Error in sym/subsref (line 1578)
            [inds{k},refs{k}] = privformat(inds{k});

Error in Untitled3 (line 2)
x(n)=kroneckerDelta(n-1,0)

Answer 1

[Star Strider]

It works correctly in R2021b —

syms n 
x(n)=kroneckerDelta(n-1,0)

x(n) = 

d=ztrans(x(n))

d = 

Perhaps an upgrade is in order?

.

[ali s]

I'm using matlab R2013a

[Star Strider]

I did not know that.

Answer 2

[Walter Roberson]

kroneckerDelta() was added in R2014b. You will need to do one of the following:

• write your own version of kroneckerDelta
• write the code using different functions
• see if you can find an equivalent function inside the symbolic engine and access it using evalin()

[ali s]

Thanks a lot