how to export multiple .mat files to csv using the automation script?

i have multiple .mat files, each mat file consits of 2 datasets (Input and Output). i was successful to combine Inputs and Outputs in a single .mat file and convert it to .csv file.

>>load('mat_file1.mat');

%2 files are loaded in workspace (Input.mat 100x10 and Output.mat 100x10)

>>I/O_file1 = [Input Outpt];

%single MAT file created (I/O_file1.mat 100x20)

>>xlswrite('I/O_file1.csv', mat_file1.mat);

%CSV file created

But there are several MAT files in a single folder such as ( mat_file1.mat, mat_file2.mat, mat_file3.mat, mat_file4.mat, mat_file5.mat .....)

Now i need an Automation script so that i can convert all the MAT files present in the folder at once.

Answer 1

[Rik]

Load to a struct:

base=sprintf('mat_file%d',1);

S=load([base '.mat']);
data=[S.([base '_Inputs']) S.([base '_Outputs'])];
xlswrite([base '.csv'],data);

[Sandeep GNV]

thanks for the above solution, it worked. but i have a another problem following to that, i need to add a Row with the Column Names before converting it to the .csv file.

[Ola Fekry]

Plz I have RF signals dataset of 220000 .mat files for 11classes I want to put them in a CSV file with labels

[Rik]

Ok, good luck. If you have any questions when doing that: have a read here and here.

[Ola Fekry]

Ok thanks

Answer 2

[Sandeep GNV]

i have set of MAT files ina folder so i wrote an automation code to convert the set of MAT files in folder to CSV files all at a time. each MAT file consits of 2 datasets (Inputs and Outputs).

for i = 1:4; for j = 0:50:100

base=sprintf('Heating_Data1_0C_RB%d_Comb%d',j,i);

S=load([base '.mat']);

data=[S.([base '_Inputs']) S.([base '_Outputs'])];

xlswrite([base '.csv'],data);

end

end

so this merge the two MAT files(Inputs &Outputs) into a single MAT file and covnerts it to CSV file. but here in the excel sheet you see only the numeric data, so now i need to insert a Row on the top with the column headings.

[Rik]

You can extend the data variable. You probably need to convert it to a cell array (if it isn't one yet) with num2cell. Then you can trivially add the header.