This graph describes the global shipments of tablet computers. According to the graph other 
tablets based on mobile technology has seen a significant increase in shipments over ipad 
and tablets based on pc technology.
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);