comp.lang.idl-pvwave archive - RDF feed
type: channel
description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: Problems with plotting with log scaling

Problems with plotting with log scaling
type: item
description: If I plot a series of numbers that ranges from let's say 0 to 10e-4 such as in the following IDL command: plot, indgen(10)*.001, /ytype then IDL will scale the value with 8 magnitudes of values from 10e-2 to 10e-16 because I believe that the precision is approaching zero, which is the minimum value. The problem is that you cannot see anything relevant in a log scaling when the data should be plotted with a minimum at 10e-4 and not 10e-16. If zero is a valid value is there any way around this besides explicitly forcing the yrange = [10-4,10-2] or min_value = 10e-4 because the plots are generated automatically and all the zero values would be lost. Jason Mathews -- ------------------------------------------------------------ ------------------ Jason Mathews, Code 633.2 |National Space Science Data Center NASA/Goddard Space Flight Center|email: mathews@nssdc.gsfc.nasa.gov Greenbelt, MD 20771-0001 USA |http://coney.gsfc.nasa.gov/Mathews/jason.html
creator: mathews
date: 1995-06-23T07:00:00-00:00