Splitting a Colorbar into 12 parts according to months from data

Hi,

Im trying to use the month function and a for-loop to find and plot specific data according to different months, for example january would be red and february would be blue. I have been trying to have 12 different colors for each month corresponding to each data set.

Thank you

[Walter Roberson]

What is the difference between this and https://www.mathworks.com/matlabcentral/answers/1600850-splitting-a-colorbar-into-12-parts-according-to-months-from-data?s_tid=srchtitle ?

[DGM]

I think this question and answer are at least general enough to be useful to future searches.

Answer 1

[DGM]

If you're doing a line plot, it may make more sense to just use a legend.

% the selected colormap
cmap = jet(12);

% dummy data
x = 1:30;
y = rand(12,30)+(1:12).';

% plot setup
hp = plot(x,y);
set(gca,'colororder',cmap)

monthnames = {'Jan','Feb','March','April','May','June','July','August','Sept','Oct','Nov','Dec'};
legend(hp,monthnames);

If you really want to use a discrete colorbar that way instead, you can.

clf;
% the selected colormap
cmap = jet(12);

% dummy data
x = 1:30;
y = rand(12,30)+(1:12).';

% plot setup
plot(x,y)
set(gca,'colororder',cmap)

% wrangle the discrete colorbar tick alignment
colormap(cmap)
cb = colorbar;
cb.Ticks = 1/24:1/12:1;

monthnames = {'Jan','Feb','March','April','May','June','July','August','Sept','Oct','Nov','Dec'};
cb.TickLabels = monthnames;

[Sebastian Sunny]

Thank you for the answer but i have to implement both a for loop and a month function for this problem. Also the data has timestamps already given to it so how would i implent that into the color scheme.

Thank you

[DGM]

See this

https://www.mathworks.com/matlabcentral/answers/1599669-for-loop-which-changes-color-depending-on-the-month

and the response to your latest question. I'll see if I can't enhance my answer there. Give me a bit and I'll update it.