MATLAB: How to skip the first 3 lines and read two columns of numerical data as a matrix

read datatext filetextscan

Dear friends, Enclosed please find a text file. I want to skip the first 3 lines and read the remaining numerical data in 2 columns as a matrix. Many thanks in advance

Best Answer

Use textscan:

fidi = fopen('rp_test.txt', 'rt');
d = textscan(fidi, '%f %f', 'HeaderLines',2);
figure(1)
plot(d{1}, d{2})
xlabel('"Flow Time"') 
ylabel('"Area-Weighted Average Pressure Coefficient"')
grid

Related Solutions

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 assign the value of a variable out of other variables

There are many ways to do this:

p_k = [p_g, p_a, num2str(p_n)]; %note the lack of quotes

Or my preference:

assert(mod(p_n, 1) == 0, 'p_n is not integer') %for the %d to work in sprintf, p_n must be integer
p_k = sprintf('%s%s%d', p_g, p_a, p_n);

And please, use more descriptive variable names.

Best Answer

Related Solutions

MATLAB: Reading a .dat file with textread

MATLAB: How to assign the value of a variable out of other variables

Related Question