elseif staement problem when matches a combination of string and number

Hi,

I have a function returnes the folder name. It works very well for 'Al', 'Os' and 'Pt' but when I define 'O17' it gives me error. The "O" is a letter not a number.

Here is the error. Any idea how to resolve this? Thank you.

==================================

Arrays have incompatible sizes for this operation.

Error in returnFolderName (line 3)

if TagPerTab== 'Al' ; FolderName='Aluminum'

Error in ReacPenPlots5 (line 7)

FolderName=returnFolderName(TagPerTab)

=============================================

% Main code calling FolderName
TagPerTab= 'O17'
FolderName=returnFolderName(TagPerTab)


% The function

function FolderName=returnFolderName(TagPerTab)

if TagPerTab== 'Al' ; FolderName='Aluminum'
    elseif TagPerTab== 'Os' ; FolderName='Osmium'
elseif TagPerTab== 'O17' ; FolderName='Oxygen' % gives error for this selection
    elseif TagPerTab== 'Pt' ; FolderName='Platinum'
    else
        "The  folder was not found. Enter a valid  name" 
 end

Answer 1

[Cris LaPierre]

The error in this situation is coming from TagPerTab == 'A1'.When using the '==', it is comparing each character. When you do not have the same number of characters on the right and left of the equals signs, you get an error.

My suggestion would be to use strcmp instead.

if strcmp(TagPerTab,'A1')

FolderName='Aluminum';

elseif ...

...

end

This also might be a scenario to consider using a switch statement instead. Also, you must do something to display the error message if the file is not found (disp, warndlg, errordlg, etc).

% Main code calling FolderName
TagPerTab= 'O17'

TagPerTab = 'O17'

FolderName=returnFolderName(TagPerTab)

FolderName = 'Oxygen'

% The function
function FolderName=returnFolderName(TagPerTab)

switch TagPerTab
    case 'Al'
        FolderName='Aluminum';
    case 'Os'
        FolderName='Osmium';
    case 'O17'
        FolderName='Oxygen'; % gives error for this selection
    case 'Pt'
        FolderName='Platinum';
    otherwise
        warndlg("The  folder was not found. Enter a valid  name")
end
end

[Birsen Ayaz-Maierhafer]

Chris,

Thank you. I used switch, case and otherwise and it resolved the issue.