Deletion of selected rows of excel from Matlab GUI

HI, I am new to MATLAB and I am trying to delete all rows except 1st and 2nd where I gave headers. But the way, for example if there are 100 rows, this code is deleting 50 rows, and then if I save that file and try to delete again from MATLAB GUI, it will delete 25 out of those 50 and so on. can any one help me out in understanding what am I doing wrong here.

file = 'C:\Users\rk49845\Documents\MR\experimental TCC\exp2.xlsx';
sheet = 'Sheet1';
Excel = actxserver('Excel.Application');
Workbook = Excel.Workbooks.Open(file);
Worksheet = Workbook.Worksheets.Item(sheet);
for row = 3:100;
    Worksheet.Rows.Item(row).Delete;
end
Workbook.Save;
Workbook.Close;

[Adam]

Never delete things in a loop from start to end. If you must delete in a loop then do it from end to start, otherwise you are pulling the rug out from under your feet with your deletions.

Better still is to do all deletions at once based on a set of indices but I don't know if that is possible with what you are doing as I don't interact with Excel in Matlab.

[raghavendra kandukuri]

@ Image Analyst

Answer 1

[Image Analyst]

Like Adam said in the comment above, reverse the order:

for row = 100 : -1 : 3
    Worksheet.Rows.Item(row).Delete;
end

[raghavendra kandukuri]

Thanks, it works now.

[Image Analyst]

You could also delete them all in one shot:

% Select the range  
Excel.Range(cellReference).Select;
% Clear the cell contents.
Excel.Selection.Clear;
% Put "cursor" or active cell at A1, the upper left cell.
Excel.Range('A1').Select;

cellReference would be something like 'A3:Z100'.

[raghavendra kandukuri]

Thank you @ Image Analyst