DokuWiki
http://zero.as.arizona.edu/pdlwiki/
2009-11-23T22:29:56+01:00DokuWiki
http://zero.as.arizona.edu/pdlwiki/
http://zero.as.arizona.edu/pdlwiki/lib/images/favicon.icotext/html2008-06-24T01:25:44+01:00anonymous@72.211.136.13start
http://zero.as.arizona.edu/pdlwiki/doku.php?id=start&do=diff&1214292344
PDL How to's and script repository This site is set up to help document use of the Perl Data Language (PDL) for data reduction in astronomy. I find PDL to be a very powerful language for manipulation of images. However, I often find myself spendin...text/html2007-08-03T11:23:46+01:00anonymous@128.196.211.177howto
http://zero.as.arizona.edu/pdlwiki/doku.php?id=howto&do=diff&1186161826
PDL How To's Please create a new page for individual how to’s Install PDL on a Fedora machine Install PDL on a Ubuntu machine Install PDL on a Windows machine Perldl tips 'n' tricks avoid flickering in rapid display of PGPLOT frames ...text/html2007-06-21T21:48:49+01:00anonymous@72.211.136.13install_windows
http://zero.as.arizona.edu/pdlwiki/doku.php?id=install_windows&do=diff&1182484129
Installing PDL under windows PDL is available using the Perl Package Manager once you’ve installed Activestate Perl Install Perl Find the Activestate Perl webpage and download the installation file. It installs version 5.8.8. Once you h...text/html2007-02-01T03:07:29+01:00anonymous@192.33.141.233install_ubuntu
http://zero.as.arizona.edu/pdlwiki/doku.php?id=install_ubuntu&do=diff&1170324449
Installing PDL on a Ubuntu 6.06 machine Phil Hinz (please correct errors and omissions) PDL may already be installed on your machine. Try typing “perldl” at a shell prompt to check. If it is not installed you can install it by runni...text/html2007-01-21T22:09:56+01:00anonymous@72.211.136.13plplot
http://zero.as.arizona.edu/pdlwiki/doku.php?id=plplot&do=diff&1169442596
PLPlot is a graphing library similar to PGPLOT. It is available on Sourceforge. I have installed it using the Ubuntu repositories. Documentation is available for the commands used. There is also an example page. As of January 2007 I have just start...text/html2006-11-13T10:14:12+01:00anonymous@128.196.209.86tips_n_tricks
http://zero.as.arizona.edu/pdlwiki/doku.php?id=tips_n_tricks&do=diff&1163438052
Extract a number from a piddle Piddles are PDL arrays. To extract a number from a piddle do $a=$image(($x),($y)); Note that $a=$image($x,$y); creates a 2-D piddle with length and width of 1 Write a number into...text/html2006-06-25T20:22:31+01:00anonymous@68.105.128.65unsharp_mask
http://zero.as.arizona.edu/pdlwiki/doku.php?id=unsharp_mask&do=diff&1151288551
An unsharp masked image is useful for extracting point sources from an image. The easiest and least intensive way to do this is to boxcar smooth the original image and then subtract this from the original image. use PDL::Image2D; #smooths image in a...text/html2006-06-18T23:51:30+01:00anonymous@128.196.100.237statcurrent
http://zero.as.arizona.edu/pdlwiki/doku.php?id=statcurrent&do=diff&1150696290
#!/usr/bin/perl -w use PDL; use PDL::Image2D; use Tk; use PDL::Fit::Gaussian; use PDL::NiceSlice; #Script to check for newly displayed images on Clio and calculate # statistics #v1.0 PMH 060406 my $mw = MainWindow->new; $mw->title...text/html2006-06-18T23:50:00+01:00anonymous@128.196.100.237shift_and_add
http://zero.as.arizona.edu/pdlwiki/doku.php?id=shift_and_add&do=diff&1150696200
Note this script only shifts to the nearest pixel. It should really be less sloppy. use PDL; use PDL::Graphics::PGPLOT; use PDL::Image2D; use PDL::Transform; #Script to create preliminary data reduction of vega $start=8; $frames=240; $cycles...text/html2006-06-18T23:49:18+01:00anonymous@128.196.100.237radial_plot
http://zero.as.arizona.edu/pdlwiki/doku.php?id=radial_plot&do=diff&1150696158
A radial plot and gaussian fit to the data can be achieved by first creating a 1-D vector using clump and then using the function fitgauss1dr. use PDL; use PDL::Graphics::PGPLOT; use PDL::Image2D; use PDL::Transform; use Image::DS9; use PDL::N...text/html2006-06-18T23:46:34+01:00anonymous@128.196.100.237ds9_display
http://zero.as.arizona.edu/pdlwiki/doku.php?id=ds9_display&do=diff&1150695994
DS9 is a useful interactive display program. The short script below shows how to display an image to it from within PDL, read in image coordinates and rotate an image to create a cut through an image. use PDL; use Image::DS9; use PDL::Transform;...text/html2006-06-18T23:45:50+01:00anonymous@128.196.100.237flicker
http://zero.as.arizona.edu/pdlwiki/doku.php?id=flicker&do=diff&1150695950
when you show successive images in PGPlot with imag ($frame); The image will flicker since PGPlot redraws the window each time. To avoid this use imag ($frame); hold; This will avoid the flickering and is a good quick-look animation ...text/html2006-06-18T23:32:06+01:00anonymous@128.196.100.237plot_graph
http://zero.as.arizona.edu/pdlwiki/doku.php?id=plot_graph&do=diff&1150695126
To plot a graph from a list of numbers use the command “rcols” and PGPlot use PDL; use PDL::Graphics::PGPLOT; ($timel, $time, $f1l, $f1, $f2l, $f2, $vl, $v) = rcols 'loop500hz.060617.out'; dev("/xs",{Color=>1,Axis...text/html2006-06-18T01:07:25+01:00anonymous@192.33.141.222scripts - created
http://zero.as.arizona.edu/pdlwiki/doku.php?id=scripts&do=diff&1150614445
This page should list scripts which may be of use to others or demonstrate useful PDL features. Please comment scripts. Tk statistics display for the Clio camera ...text/html2006-06-17T22:26:21+01:00anonymous@192.33.141.222perldl_tips_n_tricks
http://zero.as.arizona.edu/pdlwiki/doku.php?id=perldl_tips_n_tricks&do=diff&1150604781
To extract a number from a piddle do $a=$image(($x),($y)); Note that $a=$image($x,$y); creates a 2-D piddle with length and width of 1 ...text/html2006-03-31T22:16:24+01:00anonymous@68.105.128.65install_pdl_on_a_fedora_machine
http://zero.as.arizona.edu/pdlwiki/doku.php?id=install_pdl_on_a_fedora_machine&do=diff&1143868584
Installing PDL on an FC4 machine Phil Hinz (please correct errors and omissions) PDL may already be installed on your machine. Try typing “perldl” at a shell prompt to check. If it is not installed you can install it by running yum ...text/html2005-07-13T08:25:51+01:00anonymous@68.105.128.65select_a_single_pixel_from_an_image - created
http://zero.as.arizona.edu/pdlwiki/doku.php?id=select_a_single_pixel_from_an_image&do=diff&1121264751
Say you want to take a single pixel in an image and change it to something else. use PDL::NiceSlice; $psfmin=zeroes(30); $psfmin("$i").=min($psfbin); ...