Does this help? pd 'reset' pd 'itemcolor red' pd 'type marker' pd 'markersize 1.2' pd 'markers circle' pd (i.15);15?30 pd 'itemcolor blue' pd (5+ i.10);7 + 10?30 pd 'show'
Or are you after more of a continuous colour change? On Fri, Apr 20, 2012 at 10:12 PM, Graham Parkhouse <graham.parkho...@ntlworld.com> wrote: > 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 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
