Reverting the caxis index

Hi all, I have made the following image (displayed). I would like the caxi to be inverted, i.e. min = 0.4 and max = 0.1. So the axis should be something like:

0.1

0.15

0.2

0.25

0.3

0.35

0.4

Ideally the code should look as follows:

caxis('manual')
caxis([round(max(auc_weighted.AUC_weighted_new),1) round(min(auc_weighted.AUC_weighted_new),1)])

Is it possible to do so?

I thought about reverting the sign but then I would like the minus sign not to display in the image...

Thank you,

Federico

[Yazan]

No. Read here. The limits should specified as a vector of the form [cmin cmax], where cmin must be less than cmax.

Why don't you invert the colormap itself?

[federico nutarelli]

@Yazan thank you for the reply. Actually because I would like the darkest countries to have the lower values. In any case I will post the code that I produce so far below. Can you help me ut reverting the color map please (so that lighter shades are for higher indices):

%blue countries
h=.6.*ones(119,1);
v= ones(119,1);
s=[0:0.008405:1]';
hsv1 = [h,s,v];
myColorMap = hsv2rgb(hsv1);
caxis('manual')
caxis([round(min(auc_weighted.minus),1) round(max(auc_weighted.minus),1)])
%caxis([round(min(auc_weighted.AUC_weighted_new),1) round(max(auc_weighted.AUC_weighted_new),1)])
colormap(myColorMap);
colorbar

borders('countries','r')
borders('countries','facecolor',[0.85,0.85,0.85])
axis tight

for k=1:(size(auc_weighted,1))
    borders(cell2mat(auc_weighted.country(k)),'facecolor',myColorMap(k,:))
end

[federico nutarelli]

Maybe I should only sort myColorMap in descend order...?

[Yazan]

It is pretty straightforward to invert the colormap. Just insert this in your code:

myColorMap = flipud(hsv2rgb(hsv1));

[federico nutarelli]

Thanks it works

Answer 1

[Scott MacKenzie]

To reverse the order of colors, just change

colormap(myColorMap);

to

colormap(flipud(myColorMap));