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Need help with a For loop or any loop with some sort for my code

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shez96
shez96 2012-4-26
关闭： MATLAB Answer Bot 2021-8-20
I have written a code to calculate an area under a graph( WAV file). But say if the the plot includes 60000 samples I need to calculate the area for every 5000 samples. Currently If "y1" is my data I have a set of data as below:
y = y1(1:5000);
%y = y1(5001:10000);
%y = y1(10001:15000);
%y = y1(15001:20000);
The data from "y" is used to calculate the power spectrum etc. At the moment I have to find "y" manually by Commenting and uncommenting for each line of data, so I was wondering whether anyone could help me out with this situation.
Thanks

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Wayne King
Wayne King 2012-4-26
If you have the Signal Processing Toolbox, you can use buffer:
y = randn(5e4,1);
y1 = buffer(y,5e3);
Then take your data as the columns of the matrix.
Otherwise, use reshape()
y1 = reshape(y,5e3,10);
I think buffer() might be better, because that handles the case where your data length is not divisible by 5000.

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