| Re: histogram crashes (example code) [message #22527] |
Thu, 16 November 2000 00:00 |
![Stein Vidar Hagfors H[1] is currently offline](theme/default/images/xoffline.png.pagespeed.ic.XRkd1fkXye.png "Stein Vidar Hagfors H[1] is currently offline")
Stein Vidar Hagfors H[1]
Messages: 56
Registered: February 2000
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"R.G.S." <rgs1967@hotmail.com> writes:
> Here is a main level code that does crash IDL 5.3.1 on WinNT4 SP5
> So if anyone cares to see if it runs on other platforms, please
> let me know how it works out.
Crashes here, too:
IDL> print,!version
{ sparc sunos unix 5.3 Nov 11 1999}
(Or rather, it crashes when you try to do anything *after* executing
that histogram call).
By the way, talking to Bill Thompson I just learned that it's now
possible to say:
IDL> a=fltarr(1,1,1,1,1,1,1,2)
IDL> help,a[0,0,0,0,0,0,0,0]
which used to give some kind of syntax error in previous IDL versions
(4.x, at least) whereas it would work with 7 subscripts, but not 8.
However, look at this:
IDL> help,[0,0]
<Expression> INT = Array[2]
IDL> help,[[0],[0]]
<Expression> INT = Array[1, 2]
IDL> help,[[[0]],[[0]]]
<Expression> INT = Array[1, 1, 2]
IDL> help,[[[[0]]],[[[0]]]]
help,[[[[0]]],[[[0]]]]
^
% Only eight levels of variable concatenation are allowed.
Obviously, they forgot to fix all aspects of the parser...
------------------------------------------------------------ --------------
Stein Vidar Hagfors Haugan
ESA SOHO SOC/European Space Agency Science Operations Coordinator for SOHO
NASA Goddard Space Flight Center, Email: shaugan@esa.nascom.nasa.gov
Mail Code 682.3, Bld. 26, Room G-1, Tel.: 1-301-286-9028/240-354-6066
Greenbelt, Maryland 20771, USA. Fax: 1-301-286-0264
------------------------------------------------------------ --------------
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| Re: histogram crashes (example code) [message #22529 is a reply to message #22527] |
Thu, 16 November 2000 00:00  |
mole6e23
Messages: 31
Registered: December 1998
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Member |
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> Here is a main level code that does crash IDL 5.3.1 on WinNT4 SP5
> So if anyone cares to see if it runs on other platforms, please
> let me know how it works out.
I went back and tried the code on Alpha IDL 5.3 and 5.1. In both cases,
the same "crash on exit" phenomenon as I saw on the Mac took place (as per
my previous post). I was actually able to print the results, etc, and do
other commands, but when I typed "exit", IDL exited with a segmentation
fault. Odd, huh?
Todd
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| Re: histogram crashes (example code) [message #22530 is a reply to message #22527] |
Thu, 16 November 2000 00:00 |
Paul van Delst
Messages: 364
Registered: March 1997
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Senior Member |
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"R.G.S." wrote:
>
> Here is a main level code that does crash IDL 5.3.1 on WinNT4 SP5
> So if anyone cares to see if it runs on other platforms, please
> let me know how it works out.
>
> Cheers,
> bob
>
> ; An example of histogram error crashes (kills IDL 5.3.1, Winnt)
>
> ;create fake data
> nscan = 1624
> nwide = 76
> lat = randomn(seed,nwide,nscan)*50
>
> ;create NANs in data
> ind = randomu(seed,43293L)
> ind = ind(UNIQ(ind, SORT(ind)))
> ind = ind*n_elements(lat)
> lat(ind) = !values.f_nan
>
> ; create binning ranges
> latrange = [-70,-20]
> deltalat = 4
>
> ;offending histogram call
> hlat = histogram(lat(*),binsize = float(deltalat), min =float(latrange(0)),$
> max = float(latrange(1)),REVERSE_INDICES = R,omax = omax,omin=omin,/nan)
>
> end
Ran just fine on my machine (IDL 5.4, linux RH6.1). I don't know if the results were any
good or not but nothing untoward happened.
IDL> help
% At $MAIN$
DELTALAT INT = 4
HLAT LONG = Array[13]
IND FLOAT = Array[43255]
LAT FLOAT = Array[76, 1624]
LATRANGE INT = Array[2]
NSCAN INT = 1624
NWIDE INT = 76
OMAX FLOAT = -20.0000
OMIN FLOAT = -70.0000
R LONG = Array[22970]
SEED LONG = Array[36]
Compiled Procedures:
$MAIN$
Compiled Functions:
UNIQ
paulv
--
Paul van Delst Ph: (301) 763-8000 x7274
CIMSS @ NOAA/NCEP Fax: (301) 763-8545
Rm.207, 5200 Auth Rd. Email: pvandelst@ncep.noaa.gov
Camp Springs MD 20746
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| Re: histogram crashes (example code) [message #22531 is a reply to message #22527] |
Thu, 16 November 2000 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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R.G.S. (rgs1967@hotmail.com) writes:
> Here is a main level code that does crash IDL 5.3.1 on WinNT4 SP5
> So if anyone cares to see if it runs on other platforms, please
> let me know how it works out.
Oh, oh. Works great in IDL 5.4 on WinNT4, SP 6. :-)
Cheers,
David
P.S. It did crash IDL 5.3.1 on same platform.
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: histogram crashes (example code) [message #22532 is a reply to message #22527] |
Thu, 16 November 2000 00:00 |
mole6e23
Messages: 31
Registered: December 1998
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Member |
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The code did not crash IDL 5.4 on Alpha, but DID crash IDL 5.03 on Mac
(crashed hard - for those who know, the debugger said it ended up in the
infamous (but non-existent, according to apple) "Bowels of the memory
manager"), although oddly enough, it didn't crash instantly. I ran the
code and it was OK...my next command was 'exit', and that's when it went
down.
Todd
> Here is a main level code that does crash IDL 5.3.1 on WinNT4 SP5
> So if anyone cares to see if it runs on other platforms, please
> let me know how it works out.
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| Re: histogram crashes (example code) [message #22533 is a reply to message #22527] |
Thu, 16 November 2000 00:00 |
R.G.S.
Messages: 46
Registered: September 2000
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Member |
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Here is a main level code that does crash IDL 5.3.1 on WinNT4 SP5
So if anyone cares to see if it runs on other platforms, please
let me know how it works out.
Cheers,
bob
; An example of histogram error crashes (kills IDL 5.3.1, Winnt)
;create fake data
nscan = 1624
nwide = 76
lat = randomn(seed,nwide,nscan)*50
;create NANs in data
ind = randomu(seed,43293L)
ind = ind(UNIQ(ind, SORT(ind)))
ind = ind*n_elements(lat)
lat(ind) = !values.f_nan
; create binning ranges
latrange = [-70,-20]
deltalat = 4
;offending histogram call
hlat = histogram(lat(*),binsize = float(deltalat), min =float(latrange(0)),$
max = float(latrange(1)),REVERSE_INDICES = R,omax = omax,omin=omin,/nan)
end
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