How i can call matlab basic function if that name is accotiated with couple of functions?

Hello,

I need to call function diff (differences between array elements) for array of symbolic variable but matlab is using function diff from matlab symbolic math toolbox. How I can define namespace of calling function?

Thanks!

[Stephen23]

"I need to call function diff..."

Why do you "need" to do this? What are you trying to achieve? So far, based on your description, the simplest and best solution to your problem is to not use this name:

https://www.mathworks.com/matlabcentral/answers/386119-how-to-shadow-the-built-in-find-function

[Sergey Kasyanov]

Thanks. Link help me to find solution.

Answer 1

[Sergey Kasyanov]

The simplest way to do that is use that code:

varargout = builtin('diff',varargin{:});

Also you can looking for something usefull there.

Answer 2

[Fangjun Jiang]

I thought it is automatic as long as you specify your symbolic variable is properly specified.

>> diff(1:3)

ans =

       1     1
  >> s=str2sym('2*x')

s =

2*x

>> diff(s)

ans =

2

[Fangjun Jiang]

Or you want to run this, but want the result to be 1?

        >> s=str2sym([{'2*x'},{'2*x+1'}])
       s =
         [ 2*x, 2*x + 1]
         >> diff(s)
         ans =
         [ 2, 2]

[Sergey Kasyanov]

Yes, I want to take 1 as a result, but function diff is not work with symbolic arrays as i understand.

[Fangjun Jiang]

I guess you have to achieve it in a different way.

>> builtin('diff',s)
Error using builtin
Undefined function 'diff' for input arguments of type 'sym'.

>> builtin('diff',1:3)

ans =

       1     1

>> s(2)-s(1)

ans =

1