1. IDL tips MARGIN and OMARGIN -- When you are plotting more than one picture on a page, the graphics keyword MARGIN and OMARGIN are very useful to control the space between rows and columns and the margin of the whole page, separately. For example: !P.Multi=[0,2,3] !X.MARGIN=[8,5] !Y.MARGIN=[3,2] !X.OMARGIN=[3,3] !Y.OMARGIN=[3,3] plot,x,y,xmargin=[8,5],ymargin=[3,2] The unit is the character size.These keywords affect IDL's calculation of POSITION for each plot. And they have default values.

Xiangrong Fu Posted at 2006-12-30 10:37 CST Last modified at 2006-12-30 10:51 CST Link to this poster Top

2. Re: IDL tips COLOR TABLES -- Predefined color tables is convenient for plotting colorful figures. IDL has a lot.For example: loadct,13 loads a rainbow type color table with 256 colors. 13 means the 13th color table. loadct with no parameter will show all tables. If only a few colors are needed, command like this: loadct, 13, ncolors=10 will select 10 out of 256 with equal span.

Xiangrong Fu Posted at 2006-12-30 10:46 CST Last modified at 2006-12-30 10:49 CST Link to this poster Top