Matlab check if file does not exist

Valentino on 27 Apr Works perfect, thanks! Nelson dos Santos Netto on 4 Mar Thanks for the information! Btw, I was wondering if this check is purely done regarding the file name or the content in the file itself The thing is:I'm trying to develop a script to regularly copy files from a sourcefolder to a destinationfolder, but I wanted to make sure I copy only the most recent and modified data, in order to get a more efficient and quicker programme.

Could you help me out, please?? Tks a lot! Image Analyst on 4 Mar It checks if a file with that filename is there. It does not check what the contents are, or even if there are contents. It's possible to have a file with zero bytes. Azzi Abdelmalek on 29 Sep Edited: Azzi Abdelmalek on 29 Sep I prefer this answer, as it only checks in the current directory.

Jan on 6 May But if the current directory contains a huge number of files, it is a waste of time. If the current folder is in a network drive, the slow down is substantial.

This is more efficient:. Vote 2. Simon on 2 Nov Edited: Simon on 2 Nov Folders are an exception to the function precedence rules. They have precedence over all types except for variables and built-in functions.

For example, if name matches both a file with a. If name matches both a variable and a P-code file, exists returns 1, identifying it as a variable. Create a variable named testresults , and then confirm its existence in the workspace. Create the folder myfolder , and then check its existence as a folder.

Check whether the plot function is a built-in function or a file. Name of variable, script, function, folder, or class, specified as a character vector or string scalar. If name specifies a file with a non-registered file extension.

You can also include an extension to prevent conflict with other similar file names. They have precedence over all types except for variables and built-in functions. For example, if name matches both a file with a. If name matches both a variable and a P-code file, exists returns 1, identifying it as a variable.

Create a variable named testresults , and then confirm its existence in the workspace. Create the folder myfolder , and then check its existence as a folder. Check whether the plot function is a built-in function or a file. Name of variable, script, function, folder, or class, specified as a character vector or string scalar.

If name specifies a file with a non-registered file extension. You can also include an extension to prevent conflict with other similar file names. For example, exist file. Andres you are right. Deleted my comment because it was wrong. The exist function does not return a 1, you have to use if exist 'JaccardDistance', 'file' Depending on what the function found, a view between 1 and 8 is returned.

Daniel Daniel To return 1 or 0 use size dir 'JaccardDistance' ,1 i. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Linked 0.