How to process and plot the data from the .txt files when the filenames rae not sequential?

filename = 'Cyprus.2010.101.07.52.G06.txt'; 
delimiterIn = ' ';
% headerlinesIn = 1;
A = importdata(filename,delimiterIn);
Altitude = A(:,1);
Digisonde = A(:,2);
COSMIC = A(:,3);
plot(Altitude, Digisonde,'--blo', Altitude, COSMIC, ':r*')
title('Day Number:101 Year:2010 07:52 UT Station: Cyprus')
xlabel('Altitude (Km)')
ylabel('Electron Density (/m3)')
legend('Digisonde', 'COSMIC')
saveas(gcf,'101_2010.jpg')

This code gives plot for a single .txt file. But if I want to process all the .txt files in the same directory in a loop, how to proceed? The file names are not sequentially numbered. Please help.

[Stephen23]

"The file names are not sequentially numbered"

What does this mean exactly? Please show some examples of the filenames. Also please tell us what order you want them processed in.

[SGMukherjee]

This code runs on input text files with structured numerical data to generate a figure with the results. How can I run the program on multiple input files, say

Cyprus.2010.051.09.47.G31.txt
Cyprus.2010.225.20.58.G09.txt
etc

all at once and get a plot for each input?

Answer 1

[Rik]

You can use dir to generate a file list and apply any sort order you wish.

list=dir('Cyprus*.txt');

Edit: the code below is more ready-to-run

list=dir('Cyprus*.txt');
for n_file=1:length(list)
    filename=list(n).name;
    filename_edit=strrep(filename,'.',';');%make textscan easier
    [part1,part2,~]=textscan(filename_edit,'Cyprus;%d;%d;%s');
    delimiterIn = ' ';
    % headerlinesIn = 1;
    A = importdata(filename,delimiterIn);
    Altitude = A(:,1);
    Digisonde = A(:,2);
    COSMIC = A(:,3);
    plot(Altitude, Digisonde,'--blo', Altitude, COSMIC, ':r*')
    title('Day Number:101 Year:2010 07:52 UT Station: Cyprus')
    %you probably want to change the title here
    xlabel('Altitude (Km)')
    ylabel('Electron Density (/m3)')
    legend('Digisonde', 'COSMIC')
    saveas(gcf,sprintf('%03d_%04d.jpg',part2,part1))
end

[SGMukherjee]

Will you please elaborate? This code runs on input text files with structured numerical data to generate a figure with the results. How can I run the program on multiple input files (say, Cyprus.2010.051.09.47.G31.txt , Cyprus.2010.225.20.58.G09.txt etc) all at once and get a plot for each input?

[SGMukherjee]

Thank you so much Mr. Wisselink. Could you please check the screenshot of the error message? Is there any way I could title my figure depending on the input file used?

[Rik]

Have you read the documentation for textscan? It should be immediately apparent what mistake I made. As the error message tells you, textscan doesn't support 3 outputs, because it stores the result in a cell.

part=textscan(filename_edit,'Cyprus;%d;%d;%s');
saveas(gcf,sprintf('%03d_%04d.jpg',part{2},part{1}))