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fltarr(1,1,1,1,1,1,1,2) quirk, IDL 4 [message #9563]

Wed, 16 July 1997 00:00

Stein Vidar Hagfors H is currently offline

Stein Vidar Hagfors H
Messages: 32
Registered: May 1997

Member

I just discovered a quite weird "feature" of IDL 4:
You're allowed to make arrays with 8 dimensions, but
you can only index them with 7! E.g.:

IDL4> da=fltarr(1,1,1,1,1,1,1,2)
IDL4> print,size(da)
8 1 1 1 1 1
1 1 2 4 2
IDL4> print,da(0,0,0,0,0,0,0,0)

print,da(0,0,0,0,0,0,0,0)
^
% Only 7 subscripts allowed.

This is apparently fixed in IDL 5:

IDL5> da=fltarr(1,1,1,1,1,1,1,2)
IDL5> print,da(0,0,0,0,0,0,0,0)
0.00000

Just in case someone is trying to write cross-version
compatible code.....!

Stein Vidar

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fltarr(1,1,1,1,1,1,1,2) quirk, IDL 4

By: Stein Vidar Hagfors H on Wed, 16 July 1997 00:00

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