processing multiple data in matlab at once

Hi everybody,

I have loaded a set of 50 files into Matlab workspace. (from data1 to data50)

the size of each one is 721*176.

I want to extract only the first 144 lines of each data and store it in another one.

for example

newData1 = data1(1:144,:);

My question is: How can I do this using a loop to process all data at once?

Thank you very much.

Answer 1

[José-Luis]

You could try using a cell array instead:

 your_data = cell(numFiles,1);

Populate it (ideally when you read them)

 your_data(1) = {data1}; %etc;

And then trim it:

 trimFun = @(x) x(1:144,:);
 your_trimmed_data = cellfun(trimFun,your_data,'uniformoutput',false);

Answer 2

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F