MATLAB: How to take text files and turn the data into variables

datar2015atxt

When I try to use the automated function produced by the Import Tool it never works. I'm not quite sure what I'm doing wrong but it must be something. For example I am trying to take data in a text file ( organized in order across the top Time Angle Velocity Acceleration) and turn them into variables to be used in Matlab. I'm new to trying this and so any simple explanation could go a long way. Thank You

Best Answer

I would have to see your file to provide a definitive reply. My favourite function for text file reading is textscan. It might initially appear a bit complicated to use, but it’s actually straightforward. It has several options because it needs them to work and play well with different text files.

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MATLAB: Reading a .dat file with textread

jpg images are binary images, but textread() is for reading text files.

Does the .dat file perhaps contain the names of the images rather than the images themselves?

There is no standard format for .dat files: it is a suffix used by any program to hold any data. You need to know the internal structure of that particular .dat file in order to work with it. It might be pure text (most .dat files are not).

If you can upload a sample of the file, someone might have a look at it. http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers

MATLAB: How to read the tab delimited with skipping the first row

I would use the textscan function instead. Something like this would work:

fidi = fopen(filename,'rt');
D = textscan(fidi, '%f%f%f%f', 'Delimiter','\t', 'HeaderLines',2, 'CollectOutput',1);

Experiment with it to get the result you want.

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MATLAB: Reading a .dat file with textread

MATLAB: How to read the tab delimited with skipping the first row

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