Effacer les filtres
Effacer les filtres

multidimensional matrix

2 vues (au cours des 30 derniers jours)
scour_man
scour_man le 14 Juin 2011
[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!
  1 commentaire
scour_man
scour_man le 14 Juin 2011
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 le 14 Juin 2011
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
  1 commentaire
scour_man
scour_man le 14 Juin 2011
great thanks!

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