Jacques.Hausser at ie-zea.unil.ch
Thu Oct 17 05:11:01 EDT 2002
At 3:00 -0400 17.10.2002, use-revolution-request at lists.runrev.com wrote:
> >Transpose: I tried "put transpose(Gdonnees) into Gdonnees", and
>the answer was
>>"can't transpose this array" (the same if the transpose was put into
>>It was a 10 x 28 global array (with numeric keys) which was perfectly
>>transposable with a hand-made transposition function, but I'm sure
>>the built-in function would increase the speed - if it agrees to
>>work. Which reason(s) can prevent transpose to work ?
>Not sure. Are the keys in your array successive numbers (that is 1,2,3...
>with no gaps)? Perhaps you could post the code that generates the array.
>>another question: if one has a global array, say GArray, and wants to
>>clean it, are the results of "delete GArray" and "put empty into
>>GArray" exactly equivalents?
>No. Using the "put empty into" command, the global variable still exists
>but has nothing in it (therefore the keys function returns empty because
>the variable has no elements). But it still appears in the globalNames and
The array is filled from a datasheet (the detailed scripts are a bit
long to be sent) and the code is something like that (filledField has
a name like "FLC 2 5"):
put word 2 of the short name of filledField into i
put word 3 of the short name of filledField into j
put filledField into GDonnees[i,j]
--(do plenty of other things using i and j, but without using
GDonnees any more)
... oh,oh! Light on! in my "transmat" routine and its nested repeat
loops, the possible missing elements are automatically created. I
guess transpose expect them to exist. It should be the case if the
function swaps the contents, but not if it swaps the keys.
I read the transcript dictionnary again, it says "after swaping the
order of keys", and in the comments, "the corresponding element in
transpose(array) has its two parts switched one for the other", but
farther away "the value (...) is moved (...)". A bit contradictory!
Note than a "really key swapping" transpose would be of more general
use, allowing transposition of alphabetic keys as well. Meanwhile,
I'll stick to my "transmat" routine to allow my students to transpose
Still many thanks - Jacques
Prof. Jacques Hausser
Laboratoire de Zoologie et d'Ecologie animale
Bâtiment de biologie
CH - 1015 Lausanne
tel: + 41 21 692 41 62
fax: + 41 21 692 41 65
eMail: Jacques.Hausser at ie-zea.unil.ch
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