problem with input names of vectors loaded in a function

Hi all, i have a problem using the input command. I have a code that calculates mean and std of a lot of vectors saved in the workspace and loaded in my matlab function:

close all

close all hidden

clear all

load('vettori_coppie.mat')

A=(a1prima);

B=(a2prima);

C=(a3prima);

D=(a4prima);

E=(a5prima);

etc..

data=[A B C D E F ...]

Dm_0=mean(data(1:100,:));

Ds_0=std(data(1:100,:));

I have vectors named also, for example, b1prima, b2prima, g5prima, etc... in the workspace, so it changes only the first letter of the vector's name

I want to select the vectors whose i want to calculate mean and std when calling the function in the command window like this:

function_name(a)

or

function_name(d)

etc...

or maybe with the input command.

so the function uses the first letter in loading vectors:

B=('b'2prima);

with b chosen when calling the function or with input command

C=('b'3prima);

D=('b'4prima);

etc..

How can i do this?

(sorry for bad English, I don't know if I explained the problem well enough)

Answer 1

[Jos (10584)]

Do not store your data like this. It is the contents of a variable that should change, not the name itself.

In your case, you can load the mat file in a structure

S = load('vettori_coppie.at')

S is a structure with several fields. You can get the name of the fields using FILENAMES

FN = filenames(S)

To access the contents of a specific field which the user can select you can do something like this:

DesiredField = input('Which variable do you want to process?','s')
if isfield(S, DesiredField)
   A = S.(DesiredField) ; % dynamic field name
   disp(A)
else
  disp(['The variable "' DesiredField '" is not in this file!']) ;
end