Re: PV-Wave plotting adventures

[mgs(at)ivsoftware.com (Mike Schienle)]

In article <37556853.E138DD23@ssec.wisc.edu>, Liam Gumley
<Liam.Gumley@ssec.wisc.edu> wrote:

>Martin LUETHI GL A8.1 2-4092 wrote:
>> Here is a little caveat for all users of PV-Wave plotting routines (I hope
>> this is fixed in IDL!). The errors appeard in PV-WAVE v6.10 (Solaris) but as
>> far as I remember were in all earlier versions (however I did not fully
>> realize the reason of this sometimes strange behaviour...)
>[examples deleted]
>
>The following example produces interesting results in IDL 5.2:
>
>window,/free,xs=500,ys=800
>!p.multi=[0,1,3,0,0]
>!p.charsize=2.0
>dx=1.0d-4
>plot,[0],[0],xrange=[x0,x0+dx],yrange=[x0,x0+dx],xstyle=1,ystyle=1
>dx=1.0d-3
>plot,[0],[0],xrange=[x0,x0+dx],yrange=[x0,x0+dx],xstyle=1,ystyle=1
>dx=1.0d-2
>plot,[0],[0],xrange=[x0,x0+dx],yrange=[x0,x0+dx],xstyle=1,ystyle=1
>
>The non-uniform tick spacing on the Y axis of the middle plot is quite
>novel.
>
>Cheers,
>Liam.

Grid spacing on the top plot is non-uniform for MacOS and Windows with
x0=100.0d0, and non-uniform on the middle plot with x0=1000.0d0. Is that
also true with UNIX variants?

IDL> Help, !Version, /Str
** Structure !VERSION, 5 tags, length=40:
   ARCH            STRING    'PowerMac'
   OS              STRING    'MacOS'
   OS_FAMILY       STRING    'MacOS'
   RELEASE         STRING    '5.2'
   BUILD_DATE      STRING    'Oct 30 1998'

IDL> Help, !Version, /Str
** Structure !VERSION, 5 tags, length=40:
   ARCH            STRING    'x86'
   OS              STRING    'Win32'
   OS_FAMILY       STRING    'Windows'
   RELEASE         STRING    '5.2'
   BUILD_DATE      STRING    'Oct 30 1998'

-- 
Mike Schienle                                 Interactive Visuals, Inc.
mgs@ivsoftware.com                  Remote Sensing and Image Processing
http://www.ivsoftware.com/         Analysis and Application Development