This chart shows how long it takes for the GDP of a person to double in different countries 
from $1300 to $2600 over time. The lowest amount of time is in Britain.
Error using .*
Matrix dimensions must agree.

Error in plotSpotlight (line 30)
    output = repmat(a,[1 1 3]).*single(im)/255;

Error in plot_individual_user_maps (line 49)
        [heat] = plotSpotlight(im,heatmap,3);