# count rows in matrix ?

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Rakesh Praveen on 7 Nov 2011
hey, i want to know is there a way to get how many rows are there in a given matrix. like for example when we say 'length(A)' it can give number of columns in a matrix(A), likewise can we know about number of rows ?
thank you.

Anand Gehlot on 16 Oct 2016
Use height(T)
https://www.mathworks.com/help/matlab/ref/height.html
Image Analyst on 16 Oct 2016
height() doesn't work on matrices -- it only works on tables.
morteza HEIDARI on 15 Aug 2017
If for example your matrix is A, you can use : size(A,1) for number of rows. size(A,2) for number of columns. Also there are some other ways like : length ( A(:,1) ) for number of rows.

Oleg Komarov on 7 Nov 2011
size(A,1)

Rakesh Praveen on 7 Nov 2011
thank u very much oleg komarov
Hoang-Linh To on 19 May 2014
Thank you so much, that's also what I want :)
Pooja on 22 Sep 2014
It workd for me also. Thankyou Oleg Komarov

Image Analyst on 7 Nov 2011
For a 2D matrix:
[rows columns] = size(array2D);
or, in general,
sizeOfMatrix = size(yourMatrix);

#### 1 Comment

Rakesh Praveen on 7 Nov 2011
thank u very much image analyst

Ashutosh Kumar on 22 Jul 2016
length(A) gives you maximum out of the matrix made by calling the size,so it doesn't give you column(A) and for calling column(A) you need size(A,2) and for row you need size(A,1)...like suppose you have a 5*4 matrix then length(A) will give you 5 number of rows not 4...Hope that will help others I myself used length(A) and ended up making a wrong code and took me 2 hours to do it right