Why the numerical values for function handle from matlabFunction should be written one by one?

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Tony Cheng 2018-12-12

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https://ww2.mathworks.cn/matlabcentral/answers/435296-why-the-numerical-values-for-function-handle-from-matlabfunction-should-be-written-one-by-one

评论： madhan ravi 2018-12-13

采纳的回答： madhan ravi

Hi guys,

I am now using matlabFunction for change a symbolic expression into a funtion handle.

I find a question like this: if I write the numeric values one by one to replace the symbolic variables like this:

then the answer can be obtained as 3.

However, if I write

F2= f( aa )

then, in the command window, it shows like this:

Could anyone help me about this question?

Thanks so much!

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Stephen23 2018-12-12

编辑：Stephen23 2018-12-12

What exactly is the problem?

Three scalar input arguments are not the same as a three-element vector input argument.

Tony Cheng 2018-12-13

Hi Stephen,

Thanks so much for your reply!

I mean, the arguments cannot be input into the function handle in a vertor manner, but they are input as scalars. The number of variables in the problem is big, then we have to write the scalars one by one like this :

F2 = f( aa(1) , aa(2) , aa(3) , aa(4) , aa(5) , aa(6) , aa(7) , aa(8) , aa(9) , aa(10) , aa(11) , aa(12) , aa(13) , aa(14) , aa(15) , aa(16) , aa(17) , aa(18) , aa(19) , aa(20) , aa(21) , aa(22) ) ;

Are there any methods to write them in a more compact way?

Cheers

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