Why is trailing back space removed from my folder name?

I have a subfolder named .\results (I give the whole name)

Allowing the user to change it I have name app.defOutLoc as default and the app.OutLoc once confirmed.

app.OutLoc = app.defOutLoc;

K>> defOutLoc

defOutLoc =

"C:\Users\CPSLab\Documents\OdorChoiceDev\results\"

K>> app.OutLoc

ans =

"C:\Users\CPSLab\Documents\OdorChoiceDev\results"

So when I add the folder name to file name I end up saving \resultsMyFileName.txt in the parent folder

Who asked you to trim my \? and what do I do now?

I've added at some points

% Don't forget the ending \
app.OutLoc = append(app.OutLoc,"\");

but now need to chase down every time I do an assignment and add it back!

You would think it could at least be done right here where I build the name:

app.StartSessionTime = ...
    char(datetime('now','Format',"_yyMMdd_HHmmss"));
baseFileName = append(app.MouseName.Value, ...
    app.StartSessionTime);
app.SessionFileName = append(app.OutLoc, ...
    "MC_",baseFileName,"_session.m");
app.SessionFile = fopen(app.SessionFileName,'at'); % allow appending

I suppose there is some special way to combine file parts instead of append where ML put it back that I missed.

OK I found fullfile() Now to get it to properly put all the pieces together. Like this?

app.SessionFileName = fullfile(app.OutLoc, append("MC_",baseFileName,"_session"),"m";

[Gavin]

nope. the .m is part of the file name. I guess extensions aren't universal. Not that I need it but I suppose the idea is to let coe run on Mac or linux where the use the original / instead of the Microsoft abomination of switching it to \

app.SessionFileName = fullfile(app.OutLoc, ...

append("MC_",baseFileName,"_session.m"));

Done. Leaving it here in case anyone else has this problem.

Answer 1

[Voss]

I don't know why the trailing backslash is missing from app.OutLoc. Maybe app.defOutLoc is not the same as defOutLoc.

Anyway, you should use fullfile to construct file paths.

app.OutLoc = "C:\Users\CPSLab\Documents\OdorChoiceDev\results"; % missing trailing \
app.MouseName.Value = 'whatever';

app.StartSessionTime = ...
    char(datetime('now','Format',"_yyMMdd_HHmmss"));
baseFileName = append(app.MouseName.Value, ...
    app.StartSessionTime);
app.SessionFileName = fullfile(app.OutLoc, ...
    append("MC_",baseFileName,"_session.m"));

disp(app.SessionFileName) % fullfile() puts a / because we're on Linux here

C:\Users\CPSLab\Documents\OdorChoiceDev\results/MC_whatever_250128_205544_session.m