2D plot using data from different text files

I have 11 text files with two columns - one is wavelength and other is transmittance. Each file is for a particular angle of incidence. Now I need to plot a 2d plot with color bar depicting variations in transmittance with wavelength along one axis and angle of incidence along another axis. What code should I use ?

[Mathieu NOE]

hello

do you have started a code ? can you share it with the data files?

[Dyuman Joshi]

Do you have problem importing the files and subsequently the data? In that case, check - https://in.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

Otherwise, specify what you are having trouble with.

Answer 1

[George Abrahams]

Something along these lines? (Pun intended)

fileNames = [ "a.txt", "b.txt", "c.txt", "d.txt", "e.txt" ];
angleOfIncidence = [ 0, 20, 40, 60, 80 ]; % in the same order as fileNames.

n = numel( fileNames );
ax = axes( "NextPlot", "add", "ColorOrder", turbo( n ), "Box", "on" );
for iFileName = 1 : n
    % Read the text files.
    fileData = readmatrix( fileNames(iFileName) );
    % Plot the wavelength-transmittance line.
    plot( ax, fileData(:,1), fileData(:,2), "LineWidth", 2 )
end
xlabel( ax, "Wavelength [nm]" )
ylabel( ax, "Transmittance [%]" )
lgd = legend( ax, string( angleOfIncidence ) + "°", ...
    "Location", "eastoutside" );
title( lgd, "Angle of Incidence" )

From a quick Google, this seems to be the typical format for graphs of this type.

I don't think this is what you requested, but I can't figure out exactly what you mean by "a color bar depicting variations in transmittance with wavelength along one axis and angle of incidence along another axis".