How to check for file existence in previous folder

Hi.

I am fully aware of "exist" to check if a file exists in the same directory: ie. exist('kvals.mat', 'file') == 2 checks if kvals.mat exists in the same directory.

How do I do this if I want to check the existence of kvals.mat in the previous directory?

Answer 1

[KSSV]

exist('../filename')

Answer 2

[Image Analyst]

Construct the filename in the other/previous folder, and the use isfile() to see if it exists

otherFullFileName = fullfile(otherFolder, 'kvals.mat')
if isfile(otherFullFileName)
    % File exists.
else
    % File does not exist.
end