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last edited 10 years ago by test1 |
Edit detail for #324 Bug in width$OutputForm revision 3 of 4
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Editor: test1
Time: 2014/05/06 19:32:03 GMT+0 |
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added:
Width of output depends on formater. In case of formats such as TeX or MathML the actual typesetting
happens outside FriCAS and we have no way to know true width. So 'width' in OutputForm is ill-defined
and for this reason removed from FriCAS.
In OutputForm there is a function width that returns the amount of space taken by some element of OutputForm when printed as ASCII. For example
fricas
)se ou alg on
fricas
)se ou tex off
sin x
(1) sin(x)
Type: Expression(Integer)
fricas
width((sin x)::OutputForm)$OutputForm
The function width is not implemented in OutputForm .
However, the width for squares and fractions seems to be wrong:
fricas
x^2
2 (2) x
Type: Polynomial(Integer)
fricas
width((x^2)::OutputForm)$OutputForm
The function width is not implemented in OutputForm .
I would expect 2 here.
fricas
1/2
1 (3) - 2
Type: Fraction(Integer)
fricas
width((1/2)::OutputForm)$OutputForm
The function width is not implemented in OutputForm .
I would expect 1 here.
The function is unfortunately not implemented in SPAD but rather calls outformWidth coded in BOOT in the
file i-output.boot.
It would be good to have a similar function for TeX? output, by the way.
Width of output depends on formater. In case of formats such as TeX? or MathML? the actual typesetting
happens outside FriCAS? and we have no way to know true width. So width in OutputForm? is ill-defined
and for this reason removed from FriCAS?.
Martin