This graph shows a positive correlation between computer efficiency, in computations per kilowatt-hour, 
and the year, starting from 1945. Various computer models are depicted as points on this graph 
and a best-fit line shows a general trend of computing efficiency over time.
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);