| histogram crashes [message #22545] |
Wed, 15 November 2000 00:00 |
R.G.S.
Messages: 46
Registered: September 2000
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Member |
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Greetings all,
I have a situation where histogram is crashing on me, in what seems to be
a strange manner. (IDL 5.3.1, on WinNT 4 Workstation SP 5)
Here is info on my data (latitudes):
LAT FLOAT = Array[76, 1624]
IDL> help,lat(*)
<Expression> FLOAT = Array[123424]
range of latitudes: -65.8900 79.9300
min = : 20.0000
There are NAN values in the array.
Here is the offending call to histogram:
hlat = histogram(lat(*),binsize = float(deltalat), min
=float(20),REVERSE_INDICES = R,/nan)
This results in a Norton CrashGuard message and IDL closes.
Of course,the following call to histogram works with no problems:
hlat = histogram(lat(*),binsize = long(deltalat), min =float(-1),/nan)
as does:
hlat = histogram(lat(*),binsize = float(deltalat), min =float(20),/nan)
The difference seems to be that a positive "min" crashes and a negative
"min" is ok when
the reverse_index keyword is called. For my purposes the reverse_indices
keyword
is required.
Anyone run across this before, and are there any fixes?
Cheers,
bob stockwell
stockwell (at) co-ra.com
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