How to create a worldmap with color gradient ?

Hello all,

I use the function borders, and i try to create a worldmap but i can only put basic color on the map. I would like have a color gradient that evolve with a value associated to the country.

This is my code :

for i = 1 : length(unique(SF3.data(:,3)));
    for p = 1 : 204;
          borders(SF3.meta_info{5, 1}{1+p,1},'facecolor',COLOR{SF4(p,3)});
    end; 
end;

SF3.meta_info{5, 1}{1+p,1} : this is my country name COLOR{SF4(p,3)} : color associated to the country.

Perhaps that a function named ' colorbar' may help me but i don't know how to use it in this case.

Thank you for your answers

Answer 1

[Shruti Shivaramakrishnan]

Hello Thomas, 

I believe that the "contourcmap" function might be helpful in this case: https://www.mathworks.com/help/map/ref/contourcmap.html#bukujsg

Also, if you are looking at individual patches, the "patchesm" function might be helpful: https://www.mathworks.com/help/map/ref/patchesm.html

Furthermore, if you would like to work with worldmaps, the "geoshow" function could be useful: https://www.mathworks.com/help/map/ref/geoshow.html

The above documentation links contain examples regarding how to create a worldmap with different color settings and includes using different types of options as well depending on the use case. 

I have also found a file-exchange submission that may help: https://www.mathworks.com/matlabcentral/fileexchange/28943-color-palette-tables---cpt--for-matlab

Please note that file-exchange submissions would be considered third-party submissions.