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cgloggen.pro

top cgLogGen

Math, Utilities

result = cgLogGen( [numpts] [, /Double] [, Finish=float/double] [, Start=float/double])

This function creates an evenly spaced vector of points in log space.

Return value

A vector of values, evenly spaced along a log axis.

Parameters

numpts in optional type=integer default=10

The number of points desired in the output vector.

Keywords

Double in optional type=boolean default=0

Set this keyword to return the values as double precision values. Otherwise, floating point values are returned.

Finish in optional type=float/double default=100

The ending value of the vector. The output values are evenly spaced between Start and Finish. This value must be a positive number.

Start in optional type=float/double default=1

The starting value of the vector. The output values are evenly spaced between Start and Finish. This value must be a positive number.

Examples

To create 10 values evenly spaced between 5 and 15:

  points = cgLogGen(10, Start=5, Finish=150)
  cgPlot, points, PSym=2, /YLog

Author information

Author:

FANNING SOFTWARE CONSULTING:

   David W. Fanning
   1645 Sheely Drive
   Fort Collins, CO 80526 USA
   Phone: 970-221-0438
   E-mail: david@idlcoyote.com
   Coyote's Guide to IDL Programming: http://www.idlcoyote.com

Copyright:

History:

Change History:

  Written, 17 January 2012. DWF.

File attributes

Modification date:	Fri Mar 27 11:07:38 2015
Lines:	112
Docformat:	rst rst

Coyote Graphics Routines

Date: Fri Mar 27 12:14:20 2015

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