flipud will not work anymore

Asked by Vince Clementi on 18 Sep 2017

Latest activity Commented on by Steven Lord on 26 Sep 2017

4 views (last 30 days)

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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3 Answers

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Answer by Chad Greene on 26 Sep 2017

Accepted Answer

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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Answer by 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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Answer by 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']

2 Comments

James Tursa on 26 Sep 2017

So ... you wouldn't get 'peed'?

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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Vince Clementi (view profile)