# shows very simple load datasets and take difference

ds1= getDataSet( "http://autoplot.org/data/image/Capture_00158.jpg?channel=greyscale" )
ds2= getDataSet( "http://autoplot.org/data/image/Capture_00159.jpg?channel=greyscale" )

result1= add( ds1, ds2 )
result2= ds1 + ds2           # python operators are overloaded, this is the same

result= ds2 - ds1