Creating and naming arrays on the fly

I have a vector composed of names. For each one of these names I want to create a separate array. Each name is to be called up from within a For loop and at that time populated with data from an external source using the "fetch" command, saved and then repeated for the name in the next row....etc.

Any idea how this can I can do this? Any help is more than appreciated.

Thanks.

Answer 1

[TAB]

If you have array names as string and want to create variables with the same name try eval() function.

See

>> doc eval

But eval is not recommended and should be avoided. See here why it is not recommented.

http://www.mathworks.in/support/tech-notes/1100/1103.html

Answer 2

[Oleg Komarov]

Use structures:

c = {'name1','name2','name3'};
for n = 1:numel(c)
    s.(c{n}) = fetch...
end

Or read faq 4.6 to get a wider understanding what you might be tempted to do and how to avoid it (I showed you one way).

EDIT

for n = 1:numel(c)
    s.(T(n,:)) = fetch(Connect,T(n,:),...
end

Be aware however that names for structure fields cannot start from a number.

[Carlos Freyre]

Oleg,

I tried your suggestion but it did not work. Not sure structure works in this case.

The vector of names is itself the result of filtering process that takes place earlier in the code and is stored as char in a dataset array T. Therefore, I do not name the array "c". My coding is:

for i=i:TickLength

T(i,:)= fetch(Connect,T(i,:),{'Close', 'Volume'},'DateFrom', 'DateTo');

i=i=1;

end

The error I get is:

Warning: Out of range or non-integer values truncated during conversion to character.

??? Subscripted assignment dimension mismatch.

what do you think?

[Oleg Komarov]

You cannot assign results from fetch back to T(i,:) since they will most likely be cell arrays.

See my edit.