Hi,
the IBM APL2 language reference says (page 251):
if Z←L⍉R then:
(⍴Z) ←→ (⍴R)[⍋L]
In our case we have (GNU APL):
⎕IO←0
R←3 4 5 6 7 ⍴ ⍳100
L←2 4 1 0 3
Z←L⍉R
⍴Z
6 5 3 7 4
(⍴R)[⍋
On Wed, Mar 11, 2020 at 12:57:09AM +0800, Elias Mårtenson wrote:
Now, for the problematic version:
* ⍴ 2 4 1 0 3 ⍉ 3 4 5 6 7 ⍴ ⍳100*
┏→┓
┃6 5 3 7 4┃
┗━┛
As you can see, the numbers are all over the place. For some reason, it
seems to have interpreted the left arguments to
At least I believe the result is incorrect.
Let me show my observations. All tests done with ⎕IO←0
I will show 4 invocations of transpose, with the first three being correct
but the fourth one returning the wrong result.
First, let's establish the identity operation for a transpose:
* ⍴ 0
