This graph represents overall happiness in relation to a country's GDP. The higher the GDP 
the better the overall happiness of the country's citizens are. 
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);