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

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Sergey Kasyanov
Sergey Kasyanov 2018-8-17
评论： Fangjun Jiang 2018-8-17
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!

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采纳的回答

Sergey Kasyanov
Sergey Kasyanov 2018-8-17
The simplest way to do that is use that code:
varargout = builtin('diff',varargin{:});
Also you can looking for something usefull there.

更多回答（1 个）

Fangjun Jiang
Fangjun Jiang 2018-8-17
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
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Fangjun Jiang
Fangjun Jiang 2018-8-17
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

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