Image:Logarithmic spiral.png

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Logarithmic_spiral.png‎ (600 × 450 pixel, file size: 24 KB, MIME type: image/png)

This graph of a logarithmic spiral was produced using the gnuplot program with input

# Output to png file:
set terminal png small color
set output "logarithmic_spiral.png"

# Same scale for both axes, half-size output:
set size ratio -1 0.5, 0.5

# More sample points to produce smoother picture:
set samples 170

# Axes in the center, no tick marks:
set zeroaxis
set noxtics
set noytics
set noborder
set polar

# set title "Logarithmic spiral (pitch 10 degrees)"

plot [-4*pi:4*pi] [-8:10] [-8:6] 1.19**t notitle

[edit] Revisions

I've removed the title, and used an image caption instead - Egil 07:03 May 5, 2003 (UTC)
I rendered it in PPM at a much larger scale, then blurred it and scaled it down in GIMP, and saved it in PNG format. Only the part of the source starting with "# Axes" was used. --MarkSweep 05:27, 15 Jan 2005 (UTC)

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
Subject to disclaimers.

File history

Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version.
Click on date to download the file or see the image uploaded on that date.

(del) (cur) 05:05, 14 January 2005 . . MarkSweep (Talk | contribs) . . 600×450 (24,402 bytes) (replaced existing file with larger and smoother (antialiased) version)
(del) (rev) 06:58, 5 May 2003 . . Egil (Talk | contribs) . . 259×202 (1,177 bytes) (Cropped version w/o caption)
(del) (rev) 11:49, 20 July 2002 . . (Automated conversion) (Talk) . . 320×240 (1,628 bytes)