How to save multiple .mat files as one .mat file?

Hello,

I have a matlab script that processes some data for each hour of the day and saves each result as > " result_ddmmyy_hh.mat " file.

This gives me a file of all the resultant data processed for that hour.

I use this script on a loop to study the data for the whole day and then the same for the whole week.

Now I have too many files (24 X 7). I would like to store all the results of each day as one complete file, that way i will have only 7 meta-data files.

Is there a way to do this directly without re-running the entire script? Can I directly merge multiple .mat files into one .mat file?

Thank you in advance!

David :)

Answer 1

[Jeff Miller]

You can load all 24 .mat files for a single day and then save all of the collected variables together as one .mat file. For example:

Collected = cell(24,1);
for Hour=1:24
    fname = ['FileForHour' num2str(Hour) '.mat'];
    Collected{Hour} = load(fname);
end
save('CollectedForThisDay','Collected')

Details might change a bit depending on how the hourly variables are named and how you want them named in the collected file.

[David Mascarenhas]

All the variables for each are named the same: each hour .mat file has multiple arrays of different data. But each hour saves the data with the same variable name.

The problem with this is method you suggest is all the variable names will be the same throughout the day and so in the loop, if i do not change the variable names, only the variables of the last hour will change.

So when I want to further analyse the data, I will only be able to retrive the data of the last hour of the day.

I do not want to change the name of the variables as they are too many (around 100 different arrays each hour). What I wanted is to create a .mat file like a "directory" for each day, which has "sub-directories" within it for each hour, so that I can access it in Matlab like a folder through one .mat file.

So, does Matlab have a function like that? Or does it not exist? :/

Thank you for your answer :)

[Jeff Miller]

No, the method will save the variables for all hours---not just the last one.

For example, Collected{1}.Var1 will be the value of Var1 for the first hour, Collected{2}.Var1 wil be the value of Var1 for the second hour...Collected{24}.Var1, and so on for all variables.

In the saved file, you can think of each Collected{k} as a folder with its own collection of variables.

[David Mascarenhas]

This works!!

I had to adjust some of my data, but the idea is fantastic.

Thank you! :)