How do I Import multiple data files?

Hi All

Hope you can help me with this! I am hopelessly struggling at trying to open 7 data files which have data arranged into rows rather than columns.

I also want to skip the first 4 lines in each txt file as they contain no data.

I have done the recommended steps- using the import data and creating a function.

then doing the following code in my main file:

numFiles = 7;
startRow = 5;
endRow = inf;
myData = cell(1,numFiles);

for fileNum = 1:numFiles
    fileName = sprintf('Record_%d.txt',fileNum);
    myData{fileNum} =importfile(filename, startRow, endRow)
end

Unfortunately I keep getting the error: unidentified variable 'filename' I am not sure where I am going wrong Do I need to name the function I am using somewhere?

Thanks

[Adam]

You are using

fileName

on one line and

filename

on the next. I haven't looked in detail at the rest of your code, but that is likely the reason for the error you state. Matlab is case sensitive.

Answer 1

[Stephen23]

MATLAB is case sensitive: you define this variable:

fileName = sprintf(...)

but then try to call a different variable:

importfile(filename,...)

Note the N vs. n.

Answer 2

[Moris Bouja]

Hi Serena , can you help me what should i do to import many data files into matlab? i am new i have no idea

[Stephen23]

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

https://www.mathworks.com/help/matlab/data-import-and-export.html