Error using ' TRANSPOSE does not support N-D arrays. Use PAGETRANSP​OSE/PAGECT​RANSPOSE to transpose pages or PERMUTE to reorder dimensions of N-D arrays.

The data is from Copernicus, but sea surface height (SHW) is a 3D matirx

clear
clc
dir = 'C:\Users\Madison-Riley\Downloads\';
ncfile = 'PotentialTemp.nc'; % name of data file from copernicus
ncdisp([dir,ncfile])
lon = ncread([dir,ncfile], 'longitude'); 
lat = ncread([dir,ncfile], 'latitude');
depth = ncread([dir,ncfile], 'depth');
time = ncread([dir,ncfile], 'time');
% note 'squeeze' function gets rid of the single dimension (depth=1):
temp= squeeze(ncread([dir,ncfile], 'thetao'));  % Sea water potential temperature (long,lat,depth(=1),time)
clf
% plot temp for time t=1:
pcolor(lon,lat,temp(:,:,1)');
shading flat;
colorbar

[Cris LaPierre]

I don't see a variable SHW in your code. The only transpose operation I see is a 2D array, which should work.

Please share the full error message (all the red text). Please save your variable lon, lat, depth, time, and temp to a mat file and attach that to your post using the paperclip icon.

[Madison]

I apologize I included the wrong code, but I changed it to pagetranspose and I get an error saying Matrix dimensions must agree.

dir = 'C:\Users\Madison-Riley\Desktop\Thesis\Copernicus Data\'; % change this path to your working directory

ncfile = 'Sea.Surface.Height.nc'; % name of data file from copernicus

ncdisp([dir,ncfile])

% Dimensions: [longitude = 121; latitude = 181; depth = 1; time = 25 ]

% time = ncread([dir,ncfile],'time');

lat = ncread([dir,ncfile],'latitude');

lon = ncread([dir,ncfile],'longitude');

SWH = ncread([dir,ncfile],'VHM0');

% plot wind:

clf

pcolor(lon,lat,pagetranspose(SWH));

shading flat;

colorbar

Answer 1

[Walter Roberson]

Your nc file has lat, long, one depth, and multiple times, making it a 4 dimensional array. You are trying to pcolor() the entire 4d array at the same time. pcolor can only handle 2d data.

The error with transpose is a side show. You could permute() [2 1 3 4] instead of ' but the resulting array would still be 4d and pcolor cannot handle that. You should extract the data for one time for each pcolor, possibly looping animating over time

Answer 2

[Hiro Yoshino]

I could reproduce the same error message as follows:

X = rand(3,3,4)

X = 
X(:,:,1) =

    0.6706    0.0303    0.5018
    0.0730    0.1938    0.2540
    0.8822    0.3482    0.4408


X(:,:,2) =

    0.4965    0.3385    0.5116
    0.1462    0.7965    0.0287
    0.5615    0.5188    0.1173


X(:,:,3) =

    0.8568    0.4259    0.6431
    0.0039    0.5149    0.5037
    0.5629    0.4344    0.3892


X(:,:,4) =

    0.6134    0.9156    0.9039
    0.1609    0.5476    0.5949
    0.7602    0.2534    0.4676

transpose(X)

Error using .'
TRANSPOSE does not support N-D arrays. Use PAGETRANSPOSE/PAGECTRANSPOSE to transpose pages or PERMUTE to reorder dimensions of N-D arrays.

The best bet is replace this with pagetranspose as it says:

pagetranspose(X)

ans = 
ans(:,:,1) =

    0.2020    0.8862    0.2749
    0.8334    0.3553    0.0783
    0.6238    0.4919    0.9753


ans(:,:,2) =

    0.7364    0.8973    0.6622
    0.7870    0.0131    0.8621
    0.1376    0.8198    0.8603


ans(:,:,3) =

    0.1506    0.9980    0.8282
    0.7839    0.0601    0.6889
    0.4893    0.2768    0.0390


ans(:,:,4) =

    0.8224    0.1869    0.4129
    0.7513    0.9507    0.7576
    0.9339    0.7996    0.8677

[Madison]

I apologize I included the wrong code, but I changed it to pagetranspose and I get an error saying Matrix dimensions must agree.

dir = 'C:\Users\Madison-Riley\Desktop\Thesis\Copernicus Data\'; % change this path to your working directory

ncfile = 'Sea.Surface.Height.nc'; % name of data file from copernicus

ncdisp([dir,ncfile])

% Dimensions: [longitude = 121; latitude = 181; depth = 1; time = 25 ]

% time = ncread([dir,ncfile],'time');

lat = ncread([dir,ncfile],'latitude');

lon = ncread([dir,ncfile],'longitude');

SWH = ncread([dir,ncfile],'VHM0');

% plot wind:

clf

pcolor(lon,lat,pagetranspose(SWH));

shading flat;

colorbar

[Cris LaPierre]

Please share the full error message (all the red text). Please save your variables lon, lat, time, and SHW to a mat file and attach that to your post using the paperclip icon.

[Madison]

Error using '

TRANSPOSE does not support N-D arrays. Use PAGETRANSPOSE/PAGECTRANSPOSE to transpose pages or

PERMUTE to reorder dimensions of N-D arrays.

Error in view_wave_data (line 17)

pcolor(lon,lat,SWH');