can i used cellfun with a function which has more than one input?

Yes, use an anonymous function (or define a function inline => name your anonymous function) to wrap the call to chart_funcv, and pass the wrapper to CELLFUN:

 C = {'GBP_USD', 'GBP_AUD', 'USD_CAD'} ;
 wrapper = @(x) chart_funcv( x, New_dataopenbidx, New_datahighbidx, New_datalowbidx,New_datax, New_datavol ) ;
 A = cellfun( wrapper, C ) ;

If the output of the function is not scalar, set 'UniformOutput' to false in the call to CELLFUN:

A = cellfun( wrapper, C, 'UniformOutput', false ) ;

and A will be a cell array of (non-scalar) outputs.

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Cedric 2017-10-8

编辑：Cedric 2017-10-8

在 MATLAB Online 中打开

Look at this page: https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html

In short, @ is a function handle (a bit like a pointer), it is a way to pass a function to another or to define functions inline.

 >>  mySin = @sin ;
 >>  mySin( pi/2 )
 ans =
     1

This is useful when you want to pass a function to an ODE solver for example. If you want to integrate the sine function, you have to pass the function SIN to the integrator, and one way to pass a function is through a handle:

[t,y] = ode45( @(t,y) sin(t), [0, pi], 0 ) ;

This was for handles. Now we can create a handle on a function that we don't name (anonymous). If you didn't know about function SIND (sine in degree) and wanted to convert the what ODE45 passes to the function it integrates from degree to radian, you could either write a function for this purpose (and create an M-File for that), or create an anonymous function inline, directly in the call to ODE45:

[t,y] = ode45( @(angle_deg, y) sin(angle_deg*pi/180), [0, 180], 0 ) ;

where @(angle_deg) defines a function with one argument named internally angle_deg and the body of the function is the expression that follows.

Finally, a handle is an object that can be saved in a variable, so you can name the functions that you create inline:

 sinDegree = @(angle_deg, y) sin(angle_deg*pi/180) ;
 [t,y] = ode45( sinDegree, [0, 180], 0 ) ;
 class( sinDegree )

Charles 2017-10-8

Yes. Correct the function returns a cell array. Thank you for this. Much appreciated. I will try it

Cedric 2017-10-8

My pleasure!

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