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last edited 10 years ago by test1 |
Edit detail for #169 Print empty two dimensional array (i.e. Matrix, TwonDimensionalArray ...) revision 4 of 6
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Editor: kratt6
Time: 2007/12/20 11:25:48 GMT-8 |
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added:
From kratt6 Thu Dec 20 11:25:48 -0800 2007
From: kratt6
Date: Thu, 20 Dec 2007 11:25:48 -0800
Subject:
Message-ID: <20071220112548-0800@axiom-wiki.newsynthesis.org>
Severity: wishlist => minor
Empty one dimensional arrays are printed but no empty two dimensional array in console.
- Text Mode
- empty Matrix not printed
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(1) -> )set output algebra on
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)set output tex off
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empty()$Vector(INT)
(1) []
Type: Vector(Integer)
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empty()$Matrix(INT)
(2) []
Type: Matrix(Integer)
- LaTeX? mode
- empty Matrix causes error
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)set output algebra off
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)set output tex on
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empty()$Vector(INT)
![\label{eq1}\left[ \right]](images/5593850768678758914-16.0px.png "\label{eq1}\left[ \right]") | (1) |
Type: Vector(Integer)
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empty()$Matrix(INT)
![\label{eq2}\left[ \right]](images/4639340934722937175-16.0px.png "\label{eq2}\left[ \right]") | (2) |
Type: Matrix(Integer)
property change --kratt6, Thu, 23 Jun 2005 06:32:24 -0500 reply
Category: general => Axiom User Interface
I investigated a little further:
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)se ou tex off
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)se ou al on
(matrix [[1,2]])::OUTFORM::SEX
Cannot convert the value from type OutputForm to SExpression .
I believe that this shows that the bug is in the boot display routines. In OUTFORM we find:
matrix ll ==
lv:$ := [LIST2VEC$Lisp l for l in ll]
CONS(eform MATRIX, LIST2VEC$Lisp lv)$Lisp
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matrix []
(5) matrix
Type: Symbol
could be equivalent to empty()$Matrix INT. On the other hand, the interpreter has no way to determine the type of this matrix, so the error is probably OK.
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matrix [[]]
(6) matrix NONE
Type: Symbol
does indeed not make any sense at all.
Severity: wishlist => minor