Multiple function handle in varfun

I need to calculate the mean and STD of elements of table and the resulting table show me the mean and std in two columns next to each other. Here is the code I am using:

Tmean = varfun(@mean,T,'GroupingVariables',...
            {'stor','s_method'},'InputVariables',{'ix','atfa','iss','aad'});

How can I add STD to Tmean? I dont want to make separate table for STD.

Answer 1

[Walter Roberson]

You can use @(v) [mean(v), std(v)] as the function, and splitvars() afterwards.

[Yosef Farzi]

That was a smart move. i am trying to save 'mean' string in a variable and the use that variable for splitvars(). no luck so far, any suggestions?

a= mean
b=std
@(v) [a(v),b(v)]
splitvars(T,[a,b])

[Walter Roberson]

fun = @(v) [feval(a,v), feval(b,v)]
Tmean = varfun(fun, T, 'GroupingVariables', ...
            {'stor', 's_method'}, 'InputVariables', {'ix','atfa','iss','aad'});
Tout = splitvars(Tmean)

I would not recommend this approach. You would be better using

afun = str2func(a);
bfun = str2func(b);
fun = @(v) afun(v), bfun(v));