Mean averaging separate rows using a certain section of each row.
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I need to taken a mean average of a certain section of a row of a vector - and I need to do that for every row - giving each row's mean average.
What I have is a <300000x17> vector and when the 17 rows are plotted separately they all level off at there own approximate value - maybe by about 40% along the x-axis. Right at the very right hand edge the values seem to do a weird peak so I want to avoid the very end too.
At the end of this I'd hopefully be left with 17 values only.
Any help would be much appreciated as always!
Honglei Chen il 24 Mag 2012
Hi Tom, your example has 17 columns, not 17 rows. I'll assume you mean a 17x300000 matrix. It's not clear if the region for every row is the same, but I'll assume you want to take first 40% of each row, i.e., 120000 points. You can do the following:
mu = mean(x(:,1:120000),2)
This should be a good starting point.