Looping through Excel files in a folder.

Hello! I have a folder is 200 Excel files with data that I need to process. How do I loop through all the files (they all have names like node-1-2, node-1-3, etc.) and perform the necessary calculations? Thanks in advance.

Answer 1

[Michiele Ogbagabir]

You can use the dir function to get a list of all the files you want.

 files = dir('path-to-your-folder/*.xlsx');
 for file = files
    load(file.name)
 end

Answer 2

[Hermes Suen]

Hi, the answer will depend on what type of data you have, and what you want to do with the data but in general you can use xlsread MATLAB function and build the file name in a for loop.

for i=1:numExcelFiles
    baseFileName = 'node-1';
    extension = num2str(i);                       %Converts number into a string type
    filename = strcat(baseFileName, extension, 'xlsx'); %Assuming all of your files are of the 
                                                        % format node-1-someNumber.xlsx, this 
                                                        %combines everything into one string

     data(i) = xlsread(filename) %This will read in all the data from the filename and store it into
                              %data(i). However you can look at the documentation for this function to 
                              %read in specific ranges, sheets, or tabs of data from the excel file

%%Process the data here

end

This code can also be modified if your filenames change by using if statements, or other mechanisms in the for loop. Let me know if you have any further questions

[Ahisa]

how would one mofidy this to pull data from files that have different names but have one word in common? so, for example:

HATS12_343

HATS12_345

HATS23_343

and so on, I only want to grab the HATS12