MATLAB Answers

flipud will not work anymore

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Hi all,
I am creating a global map and using the cmocean colorbar options. I need to show depth below sea level, so for a few of the color options, I need to invert the colorbar direction. I did this a few months ago using the 'flipud' function and it worked flawlessly. However, I am trying to do the same thing again and it will not work. Am I missing something (code below)? Thanks!
[Z, refvec] = etopo('etopo1_ice_c_i2.bin', samplefactor);
geoshow(Z, refvec, 'DisplayType', 'surface');
setm(gca,'mapprojection','mercator');
cmap = cmocean(flipud('deep'),'5');
demcmap(Z, 256, cmap, [.25 .25 .25]);
colorbar;
c = colorbar
title(c,'m','FontSize',12);
set(c, 'ylim', [-10000 0]);

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Accepted Answer

Chad Greene
Chad Greene on 26 Sep 2017
The simplest solution is to use the - sign when calling cmocean. So instead of
cmap = cmocean('deep','5');
use
cmap = cmocean('-deep','5');

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More Answers (2)

Henry Giddens
Henry Giddens on 18 Sep 2017
It looks like you are calling flipud on the string 'deep', which will return the string 'deep'. I dont know what you cmocean command does (I am guessing it returns a colormap with 5 rows), but it looks like you may want to change this line to:
cmap = flipud(cmocean('deep','5'));

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Walter Roberson
Walter Roberson on 18 Sep 2017
flipud('deep') means the same as flipud(['d', 'e', 'e', 'p']) which is asking to flip a 1 x 4 char array upside down, which would get you the same array ['d', 'e', 'e', 'p']

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James Tursa
James Tursa on 26 Sep 2017
So ... you wouldn't get 'peed'?
Steven Lord
Steven Lord on 26 Sep 2017
Of course not.
Now if you had called fliplr or flip instead ... :)
>> fliplr('deep')
ans =
'peed'
>> flip('deep')
ans =
'peed'

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