<html> <head> <title>example10color.gri</title> </head> <body bgcolor="#FFFFFF"> <pre> <font color=#B22222># Example 10 -- Draw color image plot</font> <font color=#B22222># Test various colorscales.</font> <font color=#B22222># INSTRUCTIONS: Uncomment one of the following '\scale = ' statements</font> <font color=#B22222># CASE 1: From black at high values to white at low values</font> <font color=#B22222>#\scale = "rgb 0 0 0 20.0 rgb 1 1 1 0.0 increment 5"</font> <font color=#B22222># CASE 2: From skyblue at 20 to tan for 0; traverse RGB space</font> <font color=#B22222># See also case 5, which names the colors.</font> <font color=#B22222>#\scale = "rgb 0.529 0.808 0.922 20.0 rgb 0.824 0.706 0.549 0.0 increment 5"</font> <font color=#B22222># CASE 3: From skyblue at 20 to tan for 0; traverse HSB space</font> <font color=#B22222># Is it just me, or is this uglier than case 2?</font> <font color=#B22222>#\scale = "hsb 0.548 0.426 0.922 20.0 hsb 0.095 0.334 0.824 0.0 increment 5"</font> <font color=#B22222># CASE 4: Use a spectrum; traverse HSB space</font> <font color=#B22222>#\scale = "hsb 0 1 1 20.0 hsb 0.6666 1 1 0.0 increment 5"</font> <font color=#B22222># CASE 5: From skyblue to tan, traversing RGB space (by default)</font> <font color=#B22222># (Compare case 2, which uses similar endpoints, with</font> <font color=#B22222># colors specified with RGB values, and larger increment.)</font> <font color=#B22222>#\scale = "skyblue 20.0 tan 0.0 increment 2"</font> <font color=#B22222># CASE 6: From skyblue to tan, traversing RGB space (by default)</font> <font color=#B22222># Compare 2 and 5; note this has continuous increment</font> <font color=#B22222>#\scale = "skyblue 20.0 tan 0.0"</font> <font color=#B22222># CASE 7: From blue to brown</font> <font color=#0000EE>\scale =</font> <font color=#2F4F4F>"blue 20.0 brown 0.0 increment 2.5"</font> open example10.dat read line<font color=#0000EE> \header </font>read<font color=#0000EE> \D </font>read<font color=#CDAD00> .nx.</font> read<font color=#CDAD00> .ny.</font> set x name <font color=#2F4F4F>"distance along cove"</font> set y name <font color=#2F4F4F>"time"</font> set x grid 0 1 /.nx. set x axis 0 1 0.5 0.1 set y grid 0<font color=#CDAD00> .ny.</font> /<font color=#CDAD00> .ny.</font> set y axis 0<font color=#CDAD00> .ny.</font> read grid data * *<font color=#CDAD00> .ny.</font><font color=#CDAD00> .nx.</font> set image range 0 20 convert grid to image set image colorscale<font color=#0000EE> \scale </font>draw image <font color=#B22222># Draw contours in white ink</font> set graylevel 1.0 draw contour 0 20 1 unlabelled set graylevel 0.0 draw axes <font color=#B22222># redraw in case whited out </font> draw image palette left -1 right 21 increment 5 set font size 9 <font color=#B22222># Title tells what method used</font> draw title <font color=#2F4F4F>"Used `draw image colorscale<font color=#0000EE> \scale'"</font> </font></pre> </body> </html>
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