how to process many sequential data using for loop

I have 40 sequential data in my Workspace, and I would like to process each of all the 40 using a for loop.

the data is named like this...

trail

trail1

trial2

trial3

....

trial39

this is my code, but not working...

% Select each of the 40 trials

for e = 1:40

   data = trial'e';

end;

so i need to process 'data' in each loop

thank you.

[Adam]

Does your data have to be named like that or do you have a choice? Does it comes from some external source with those names?

This is one of those regular questions that people come across (and I tried to do it myself once) the answer to which is pretty much always that you really don't want to organise your data in that way.

If you really want to then lookup 'eval' in the help, but ideally you should store your data differently, either as an n-dimensional matrix or as a single cell array of 40 elements.

Answer 1

[Iain]

Ugh. Don't name variables like that, its a bad idea. But, the function you need is "eval"

 current_trial = eval(['trial' num2str(e)]);

[wasiu]

Thank you very much,it work. I will follow your advice next time, but i have a problem with the first trial,

if i use

for e=0:39

it gives error.... 'trial0' not found,

and if I use

for e=1:40 , it will skip the first 'trail'

please any advice, thank you.

[wasiu]

i have solved the problem, thank you very much.

Thank you all

Answer 2

[Julia]

Hi,

does this help you?

>> s=['trial','1']

s =

trial1

[wasiu]

i need a for loop

example ...

for e = 1:40

data=['trial','e'];

% so i can get trail1 to trial40 as 'data', each trial in each loop, until I process of the 40

end;

thanks