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5.14 Statistics

Common statistical measures. Also see Format=>Matrix_from_colour_chart for something to measure the statistics for many patches at the same time.

Stats
Finds a set of image statistics in one operation. The first row is for all bands together, then row 1 is for just the first band, and so on. The columns are min, max, sum, sum of squares, mean and deviation.

Count_set, Count_clear
Find the number of 255 and 0 pixels in an image containing only 0 and 255.

Plot_scatter
Draws a scatter chart of a list of $(x,y)$ coordinates. For example, enter [[1,2],[3,4]] at the bottom of a column and click Plot_scatter. You'll see a plot window with points marked at positions $(1,2)$ and $(3,4)$.

Open the row to change the plot style.



John Cupitt 2003-07-21