[Aimmath-developers] [ aimmath-Bugs-823941 ] bug in latex/latex/float

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Bugs item #823941, was opened at 2003-10-15 03:33
Message generated for change (Comment added) made by monks
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Category: None
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Gustav W Delius (gustav_delius)
Assigned to: Nobody/Anonymous (nobody)
Summary: bug in latex/latex/float

Initial Comment:
There is a bug in latex/latex/float exemplified by the 
following question:

name> test
h> Digits=14
t> type in $1.0123456789012$
s> [ans->`aim/TestNumeric`
(ans,1.0123456789012,`sf`=14),1.0123456789012]
end>

This will print that the teacher's answer was 1.1

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>Comment By: Ken Monks (monks)
Date: 2003-10-15 11:01

Message:
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I fixed this bug and posted the changes to aim/LaTeX.mpl to 
CVS.

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Comment By: Greg Gamble (gregg0)
Date: 2003-10-15 05:42

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Of course, you meant
h> Digits := 14
Anyway,  after starting up Maple and reading Console.mpl, 
I've tried the sequence:

Digits := 14;
latex(1.0123456789012);

and confirm your findings with the current development version
of AIM. However, with an earlier AIM I still have running, the
correct value is given. So the bug is in the AIM 3 overriding
definition of `latex/latex/float`. The reason  you only get
the one decimal place is because there is another
AIM-defined variable LaTeXDigits which is by default 3
(maybe there ought
to be two decimal places? ... is the decimal point counted
as a digit?). As to why you get 1.1 and not 1.0, the clue is
in that
the function splits off the integer part. What's left starts
with a
0 and Maple takes the number 0123 to be the same as 123.
The function hasn't taken that into account and only works
correctly when the first decimal place is non-zero. I'll see if
I can put together a fix. 

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