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David Fanning
Worked at Fanning Software Consulting
Attended Colorado State University
Lives in Fort Collins, CO
94 followers|46,169 views
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David Fanning

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There is only one explanation for getting lost on The Colorado Trail: Alzheimer's. 
It is impossible to get lost on The Colorado Trail until you, uh, do. Then confusion reigns supreme.
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Think it is crazy to hike a 500 mile twice, once in each direction? Here are some questions and answers for why I did it.  #ColoradoTrail  
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A problem with plotting wind vectors on map projections with cgDrawVectors was brought to my attention this weekend. Indeed, the vectors were pointing in the wrong direction. This was a tough nut to crack, but I believe the program works correctly now. http://www.idlcoyote.com/programs/cgdrawvectors.pro.
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I updated cgWindRose today to allow multiple wind rose plots to be displayed in the same graphics window.
This program draws a wind rose diagram. A wind rose diagram shows the frequency, speed, and direction of winds over some defined period of time. It is widely used in meteorological applications (see here:). Data to test the program (in SAMPSON formatted data files) can be freely downloaded from ...
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When is zero less than a negative number in IDL?
When is zero less than a negative number in IDL?
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A new article describes how to align overlapping histogram plots perfectly.
This article describes a method to insure overlapping histogram plots align perfectly with one another.
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SHENYUE JIA's profile photo
 
I was thinking about this yesterday when I was making the overlapped histograms. Thanks David!
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David Fanning

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Are you thinking that next year might be the year you add some adventure to your life and hike or bike The Colorado Trail? If so, you may be interested in what people on the trail had to say about their experience. I interviewed over 100 backpackers and mountain bikers on the trail this year to see what they were thinking, doing, and experiencing on the trail. Their answers were funny, profound, and occasionally heartbreaking. See for yourself by reading Colorado Trail hiker interviews.
Interviews with Colorado Trail hikers and mountain bike riders in 2015 give an interesting and unbiased view of the trail experience.
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Is the pixel mask that is returned from the IDLanROI object calculated correctly? The case for and against.
IDLanROI Mask is Calculated Incorrectly. Facebook Twitter RSS Google+. QUESTION: Is it my imagination, or does the IDLanROI object calculate a polygon mask incorrectly? Depending on the mask "rule," the polygon is either one pixel too small on a side, or one pixel too large on a side.
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I've come out of retirement, briefly, to write an an article on how to create an astronomically correct sun symbol in IDL. http://www.idlcoyote.com/cg_tips/sunsymbol.php
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The IDL Data Point blog is obfuscated behind firewalls on the ExelisVIS web site. Here is how to find it with Feedly.
The IDL Data Point blog is obfuscated behind firewalls on the ExelisVIS web site. Here is how to find it with Feedly.
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Everyone, including me, seems to be confused by the time or calendar data format. After looking into it this morning, I found it surprisingly easy to use. This article explains how to use it to read and write calendar data in a file.
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An IDL 8.3 PostScript bug will make you think your PostScript device speaks Greek!
IDL PostScript output appears to be written in Greek!
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Story
Tagline
If I'm not teaching IDL courses or answering IDL questions, I'm hiking in the mountains or playing tennis.
Introduction
David Fanning, along with his long-time programming partner, Coyote, maintain the popular IDL web page, Coyote's Guide to IDL Programming.
Education
  • Colorado State University
    Physics, 1981
  • Pennsylvania State University
    Biological Chemistry, 1981 - 1986
Basic Information
Gender
Male
Work
Occupation
IDL programming consultant, trainer, and programmer.
Employment
  • Fanning Software Consulting
    Consultant
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Fort Collins, CO