Thread: Index exceeds matrix dimensions.

I'm deleting a row from a matrix then writing it to a text file and am getting an error
------
??? Index exceeds matrix dimensions.

Error in ==> final_program at 125
fprintf(fid,'%s %s %s %s',guests{i, 1},guests{i, 2},guests{i, 3},guests{i, 4});
------
The matrix is good and I have checked it in MATLAB and it displays exactly how it should. I have this snippet of code working correctly in another switch statement when it needs to replace a cell array and then print to text file but once I try to use it to remove the cell row and print I get this annoying error. Thanks!

Here's the snippet of code in which it occurs.

Code:

 
% delete row from text file
                        [guests, lines] = show_guests('hotel.txt');
                        choices = guests;
                        choices(:,2:4) = [];
                        choices = choices';
                        [reservations, hh] = listdlg('ListString',choices, 'SelectionMode','single');
                        if hh == 1 
                            % create the new data file
                            guests(reservations, :) = [];
                            
                            % write the changes to text file
                            fid = fopen('hotel.txt', 'w+');
                            i=1;
                            for j=i:lines
                                if i ~= lines
                                    fprintf(fid,'%s %s %s %s\n',guests{i, 1},guests{i, 2},guests{i, 3},guests{i, 4});
                                else
                                    fprintf(fid,'%s %s %s %s',guests{i, 1},guests{i, 2},guests{i, 3},guests{i, 4});
                                end
                                i = i+1;
                            end
                            fclose(fid);
                        end

Originally Posted by thisisalex90

I'm deleting a row from a matrix then writing it to a text file and am getting an error
------
??? Index exceeds matrix dimensions.

Error in ==> final_program at 125
fprintf(fid,'%s %s %s %s',guests{i, 1},guests{i, 2},guests{i, 3},guests{i, 4});
------
The matrix is good and I have checked it in MATLAB and it displays exactly how it should. I have this snippet of code working correctly in another switch statement when it needs to replace a cell array and then print to text file but once I try to use it to remove the cell row and print I get this annoying error. Thanks!

Here's the snippet of code in which it occurs.

Code:

 
% delete row from text file
                        [guests, lines] = show_guests('hotel.txt');
                        choices = guests;
                        choices(:,2:4) = [];
                        choices = choices';
                        [reservations, hh] = listdlg('ListString',choices, 'SelectionMode','single');
                        if hh == 1 
                            % create the new data file
                            guests(reservations, :) = [];
 
                            % write the changes to text file
                            fid = fopen('hotel.txt', 'w+');
                            i=1;
                            for j=i:lines
                                if i ~= lines
                                    fprintf(fid,'%s %s %s %s\n',guests{i, 1},guests{i, 2},guests{i, 3},guests{i, 4});
                                else
                                    fprintf(fid,'%s %s %s %s',guests{i, 1},guests{i, 2},guests{i, 3},guests{i, 4});
                                end
                                i = i+1;
                            end
                            fclose(fid);
                        end

It may not be your problem but you should not be modifying the lower limit of a for loop inside the loop.

CB