How to give the total amount of row from a matrix as a value?

1 view (last 30 days)
I need to define the total amount of row of a matrix as a variable
and don't how to extract this number.
For example, let
M=
1 2
2 4
3 6
4 8
5 10
In this case the row number would be 5.
I thought there would be a command such as
row(M)
but did not work.
Hopefully someone knows how to solve this
Thank you for your help
Emerson

Accepted Answer

Matt Fig
Matt Fig on 30 Mar 2011
size(M,1) % The number or rows of an array.
size(M,2) % The number of columns of an array.
also,
S = size(M);
S(1) % The same as size(M,1)
S(2) % The same as size(M,2)
In general,
A = rand(4,5,2,2);
S = size(A)
notice the connection between S and the argument to RAND.
  1 Comment
Emerson De Souza
Emerson De Souza on 30 Mar 2011
Hi Matt Fig,
thank you again for your fast reply.
That was all what I needed.
I'm working tonight, may
be you will find more questions.
Or, I wish you a nice night
Emerson

Sign in to comment.

More Answers (1)

Teja Muppirala
Teja Muppirala on 30 Mar 2011
help size

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by