multidimensional matrix

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scour_man
scour_man 2011-6-14
[EDIT: 20110614 09:54 CDT - reformat - WDR]
I have a matrix dep(time,lat,lon), shape=[5 20000 30000]
The matrix is data from 5 years worth of hydrographic surveys and each survey contains data for depth at position lat and long. I already have the matrices for lat and lon as separate variables: lat [20000x1 double] and lon [30000x1 double]
The five layers of the dep matrix correspond to survey data each year from 2000 to 2004. What I would like to do is be able to 'extract' data from just one year so that I can do a contour(lat,lon,depth) plot for that year.
I am still learning the ropes with Matlab, any help would be much appreciated. Thank you!
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scour_man
scour_man 2011-6-14
I think I figured it out, I did
dep2000=dep(1,:,:);
dep2000=reshape(dep2000,20000,30000);
surf(lat,lon,dep2000)
is this right?

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Titus Edelhofer
Titus Edelhofer 2011-6-14
Hi,
using reshape works, but what you want to do, is to get rid of the first dimension (i.e., changing your 1x20000x30000 matrix to a 20000x30000 matrix). This is done using squeeze:
dep2000 = squeeze(dep(1,:,:)); % should be 20000x30000
surf(lat, lon, dep2000);
Titus

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