file reading problem with switch

Hey guys, I am posting this here hopping someone can help. I run the code and the thing is that even though I select an csv file the function doesnt read it, and it goes straight to displaying the error message. Does anyone have an idea why this happens? Thanks a lot in advance!!

function a=diavaseto

[fn, pn] = uigetfile({'*.csv'; '*.ods'; '*.xlsx'}, 'Epilogh arxeioy dedomenwn');

fullpathname=fullfile(pn, fn);

extIndices= strfind('.',fn);

fext = fn(max(extIndices):length(fn));

switch lower(fext)

case '.csv'

a=readtable(fullpathname);

% A csv file

case '.ods'

a=xlsread(fullpathname);

% An ods file

case 'xlsx'

a=xlsread(fullpathname);

%An xlsx file

otherwise

error('Unexpected file extension: %s', fext);

end

[Stephen23]

Note that some of your switch cases include the period character, but some do not.

Answer 1

[Cris LaPierre]

My suggestion is to use fileparts rather than trying to come up with your own way to extract the file extension.

If you want to use strfind, make sure you put the inputs in the correct order. You have them reversed. It should be

extIndices= strfind(fn,'.');

[Vasiliki Thomopoulou]

I tried but this is the error that comes up when I try to use the fileparts function.

[filepath,name,ext] = fileparts(fullpathname);

Undefined function or variable 'fExt'.

Error in fileparts (line 2)

switch lower(fExt)

[Stephen23]

[~,~,fExt] = fileparts(fullpathname);
%    ^^^^^ use the correct variable name here