importing data from excel, finding the last row and inserting value in a matrix
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi,
I'm importing data into Matlab from excel via the following command:
cycle=xlsread('E:\dc.xlsx','Sheet1')
I do not know the number of the last row of data.
But I need to create a 2D matrix 'grade' with zero-zero on the first row and the number of the last row of data in the excel sheet and 0 on the second row.
For example if the last row of data was on the 10th row then 'grade' would be:
grade = [0 0;10 0];
How would I do this if I do not know the number of the last row of data in advance?
May thanks
0 Kommentare
Akzeptierte Antwort
Matt Tearle
am 19 Dez. 2011
If you're already reading in the data, why not just query its size?
nrows = size(cycle,1);
grade = [0,0;nrows,0];
Weitere Antworten (1)
Patrick Saegesser
am 19 Dez. 2011
did you try
size(cycle,1)
size along dimension 1 (rows) will give you the length of your dataset, and assuming you don't have any NaN in your set, it is the number of the last row.
you can then assign any variable, e.g.
Last = size(cycle,1)
Grade = [0,0;Last,0]
and get your output.
Siehe auch
Kategorien
Mehr zu Spreadsheets finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!