how to use a parameter name list as input for a function?

Question

Skirt Zhang 2013-4-3

0
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https://ww2.mathworks.cn/matlabcentral/answers/69751-how-to-use-a-parameter-name-list-as-input-for-a-function

Dear All,

I have a tryparel function as below

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function out=tryparel(paramlist)
      disp(a)
      disp(b)
      out=a+b;
%%%%%%%%%%%%%%%%%%%%%%%%%%%

To use this function above I would like to do below

paramlist=['a,' , 'b'];
out=tryparel(paramlist)

BUT I always get errors. Can anyone help me about this?

I have to write a script calling this type of function where the input variable list is really long.

Thanks

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Answer 1

Sven 2013-4-3

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https://ww2.mathworks.cn/matlabcentral/answers/69751-how-to-use-a-parameter-name-list-as-input-for-a-function#answer_80920

编辑：Sven 2013-4-4

在 MATLAB Online 中打开

Skirt, you were very close. You just need to use a cell array:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function out=tryparel(paramlist)
      disp(a)
      disp(b)
      out=a+b;
%%%%%%%%%%%%%%%%%%%%%%%%%%%
paramlist = {4 , 10};
out = tryparel(paramlist{:})

If you instead want to do something like this:

a = 4;
b = 10;
paramlist = {'a','b'};

... then don't do this. Instead use a structure such as:

P.a = 4;
P.b = 10;
paramNameList = {'a','b'};
paramList = cellfun(@(name)P.(name), paramNameList, 'Un',0)
out = tryparel(paramList{:})

Did this answer your question? If so, be sure to hit "accept".

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Sven 2013-4-4

编辑：Sven 2013-4-4

在 MATLAB Online 中打开

Oh, small typo. Use:

out = tryparel(paramList{:})

instead of:

out = tryparel(paramlist{:})

In my last example I used some capital letters to help distinguish between paramNameList (which is just the set of variable names to use) and paramList which is the actual variables.

Skirt Zhang 2013-5-9