I am producing 2D dot scatter plots of (x,y) data in monochrome. How can I increase the information by colouring the dots according to a colour band indexed by a variable z?
A clue is given in the definition of the Surface of Revolution in the 3D examples, i.e. X=. steps _2 1.9 50 dat=. cutxyz 40 surfacerev (2+*:X);X CLR=: (RED,:YELLOW) hue _8}.8}.int01 32 pd 'backcolor teal;color CLR' pd 'edgecolor 64 64 64' pd 'type surface' pd dat Developing the ideas shown above, I have tried: RED=: 255 0 0 YELLOW=: 255 255 0 [CLR=: (RED,:YELLOW) hue 0.1*i.11 255 0 0 255 25.5 0 255 51 0 255 76.5 0 255 102 0 255 127.5 0 255 153 0 255 178.5 0 255 204 0 255 229.5 0 255 255 0 pd 'type dot' pd 'pensize 5' pd 'color CLR' pd i.11 pd 'show' This gives me a line of blue dots. If I try itemcolor instead of color I get the same plot followed by this error message: |length error: gppshape | e=.(#p) $e Can anybody help me, please? Graham ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
