How to calculate the standard deviations of each row of an array and get those as a 1-D array?

How to calculate the standard deviations of each row of an array and get those as a 1-D array?

Answer 1

[Azzi Abdelmalek]

M=rand(4,3)
% std for each row
s1=std(M,[],2)
% std for each column
s2=std(M)

[Md. Golam Mostafa]

Can I calculate the average and median value in the same way? Whats the syntax for those?

[Stephen23]

Any internet search engine will locate these functions for you:

http://www.mathworks.com/help/matlab/ref/mean.html

http://www.mathworks.com/help/matlab/ref/median.html

Learn to use the documentation, it is not just there to make the internet more colorful. The documentation explains how functions work, and it has examples too!

[Azzi Abdelmalek]

mean(M,2),
median(M,2)

Answer 2

[Jan]

Such questions are solved exhaustively in the documentation of Matlab: see doc std.

If you do not know the required command, you can look in the "See also" line of similar commands or use docsearch to search for terms inside the documentation. Even asking your favorite internet search engine is a good idea. All of these ideas are faster and more efficient than asking the forum, so it is recommended to try them at first.

Answer 3

[jaypal singh]

dear sir,

I have 90000x13 (table).mat file .

here is 1-80000 is 0 label

and 800001-90000 is 1 label

i have to find avg and std for 0 label seperate and for 1 label seperate