Access files from different directories within same loop

Hello everyone, I am requesting your help...

I want to access multiple files based on the filename, load two of them each time loop proceeds, and do several things, like compare mean values.

I have a list of stations (see attached) based on which I am building the loop. wrfdir corresponds to the .csv that contain simulated values for every station and obsdir has the .txt with measured data. When i run the code I get the "Error using importdata (line 139). Unable to open file. Error in Untitled (line 17). a=importdata(wrffile);"

So far I have only tried to load the wrf files...

obsdir ='C:\PhD\Projects\LIFE ASTI\C.3\C.3\Weather station data\from desktop\OutputObservations\';

wrfdir = 'C:\Projects\LIFE ASTI\C.3\C.3\Weather station data\from desktop\2019 run\Thess\';

stations = readtable('C:\PhD\Projects\LIFE ASTI\C.3\C.3\Weather station data\from desktop\Stations Coordinates.xlsx');

stations = table2cell(stations);

for i=1:size(stations,1)

wrffile=[wrfdir, stations{i,1},'.csv'];

a=importdata(wrffile);

return

end

[Mohammad Sami]

use the fullfile function to create the file paths

wrffile=fullfile(wrfdir, [stations{i,1}, '.csv']);