MATLAB: How to import data from multiple files into MATLAB

import dataMATLABtext file

I have multiple text files that I need to import into MATLAB so that I can analyze the data. Here is what I have so far:

 %%import data
x = importdata('1.txt'); %creates x.data and x.textdata
z1 = x.data(:,5); %grabs column 5 from x.data
z2 = x.data(:,6); %grabs column 6 from x.data
%%obtains value closest to 0 in column 'z2'
numb=0;
[~, imin] = min(abs(z2 - numb));
z2(imin)
plot(z1,z2)

How can I import multiple files to run the same operation on every text file? I've tried load(), however, it doesn't seem to work.

Best Answer

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

Related Solutions

MATLAB: How to import text files to a cell array from a folder

dinfo = dir('*.txt');
for K = 1 : length(dinfo)
  thisfilename = dinfo(K).name;  %just the name
  %read the  file data
  %do something with the data
end

MATLAB: How to add a different string to each element in a matrix

One approach is as follow if you want to store all the values in an array,

values = [1,2,3,4,5]; 
charValues = compose('Data Trial %d - %f', (1:length(values))', values')
charValues =
5×1 cell array
  {'Data Trial 1 - 1.000000'}
  {'Data Trial 2 - 2.000000'}
  {'Data Trial 3 - 3.000000'}
  {'Data Trial 4 - 4.000000'}
  {'Data Trial 5 - 5.000000'}

If you just want to display, then try

disp(sprintf('Data Trial %d - %f\n', (1:length(values))', values'))

Best Answer

Related Solutions

MATLAB: How to import text files to a cell array from a folder

MATLAB: How to add a different string to each element in a matrix

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