P.S. I don't understand how changing the $MATH_SCALE_FACTOR can be a
reliable solution. Based on my understanding, all that does is tweak
the probabilities of getting spurious black bars.
If you can reproduce this problem in the version I am using, I will
go after it.
Cheers,
Julius
At 12:39 PM 4/12/2011, jos wrote:
From my online document, you can download the version I was (and
am) using. It is a patch of a 2002 version of LaTeX2HTML. I'm
glad to hear a Version 2008 now exists. You might point the
maintainer(s) to my documentation of problems and workarounds,
since it sounds like they haven't yet traversed them all. I look
forward to upgrading myself once all known bugs are fixed. - jos
At 09:24 PM 4/11/2011, Pat Somerville wrote:
Thanks, JOS, for kindly taking the time to reply to me. Did you find your
workaround solutions to eliminate unwanted black line segments to work in a
version of LaTeX2HTML different from the one I am using? I tried the two
workaround solutions you mentioned with LaTeX2HTML Version 2008 (1.71):
1) $DVIPSOPT = ' '; in the file /usr/lib/latex2html/l2hconf.pm in place of
$DVIPSOPT .= " -E"; ;
2) Including the line "transform round exch round exch itransform" right
after the line "gsave newpath" in the file
/usr/lib/texmf/dvips/config/alt-rule.pro [The path for the file alt-rule.pro
is slightly different in LaTeX2HTML Version 2008 (1.71) than the path
mentioned within the version of the file alt-rule.pro replacing alt-rule.pro
in LaTeX2HTML Version 2008 (1.71).].
And for the tests I returned to "$MATH_SCALE_FACTOR=1.6;", without the
double quotation marks, within the file /usr/lib/latex2html/l2hconf.pm. But
unfortunately in my case the workaround 1 and the combination of the
workarounds 1 and 2 did not remove the unwanted black line segment
underneath an integral sign in the .html file produced by a latex2html
command working with the .tex file containing the LaTeX command \int\limits
_{-\infty}^{+\infty} within an equation environment. I also tried single
quotation marks or apostrophes in place of double quotation marks in the
line $DVIPSOPT = " -E"; in the file l2hconf.pm; but still the unwanted black
line segments remained within the produced .html file. So I still request
help to remove the unwanted black line segments underneath some of my
integral signs.
Pat
--------------------------------------------------
From: "jos" <j...@w3k.org>
Sent: Monday, April 11, 2011 5:02 PM
To: "Pat Somerville" <l_pa...@hotmail.com>
Cc: <latex2html@tug.org>
Subject: Re: [l2h] Black bars under integral signs when the limits
ofintegrationare -\infty and +\infty or an algebraic fraction
for each of the upper and
lower limits
Here is how I got around the black-bar problem:
https://ccrma.stanford.edu/~jos/webpub/Eliminating_Black_Rules_Equation.html
- jos
At 12:15 PM 4/11/2011, Pat Somerville wrote:
Thanks, Nasser M. Abbasi, for kindly taking the time to reply to me. I
found the file /usr/lib/latex2html/l2hconf.pm. In it among other lines
the following lines existed, but not necessarily consecutively:
$DVIPSOPT .=" -E"; (Please notice the period before the equals sign.)
$MATH_SCALE_FACTOR=1.6;
#$DISP_SCALE_FACTOR=1;
So after receiving your e-mail letter I changed two of those lines to
read:
$MATH_SCALE_FACTOR=1.8;
$DISP_SCALE_FACTOR=1.0;
.
Results in the .html file produced by LaTeX2HTML: The black line segment
under the integral sign with the limits of integration having algebraic
fractions in them was removed. But the black line segments under integral
signs produced from the LaTeX commands containing \int\limits
_{-\infty}^{+\infty} remained. Those were probably among 27 reported
errors on 27 images. I don't know with which images all of the other
errors were. But I think I remember at least one pnmcrop-related error
while latex2html was processing my .tex file.
Next I changed to $MATH_SCALE_FACTOR=2.0; in the file l2hconf.pm and
otherwise did not change any other lines in that file.
Results: There were errors on 27 images. The black segment under the
integral sign with algebraic fractional limits returned.
Continuing with the same settings in l2hconf.pm I made a test, .tex file
containing some commands very similar to
\begin{equation}
\int\limits _{-\infty}^{+\infty}
\end{equation}
and then produced a .html file from that .tex file using a latex2html...
command. In the resulting .html file a black line segment existed under
the integral sign with the limits of positive and negative infinity. What
should I do now to try to eliminate the unwanted black line segments under
some of the integral signs? Note also that there were also around 20
images with errors reported while latex2html attempted to generate them;
and in detail I don't yet know what obvious problems there were, if any,
with the associated mathematical symbols associated with the images for
which errors were reported by LaTeX2HTML.
Pat
--------------------------------------------------
From: "Nasser M. Abbasi" <n...@12000.org>
Sent: Monday, April 11, 2011 1:37 AM
To: <latex2html@tug.org>
Subject: Re: [l2h] Black bars under integral signs when the limits
ofintegrationare -\infty and +\infty or an algebraic fraction for
each of the upper and lower limits
On 4/10/2011 10:29 PM, Pat Somerville wrote:
Question: What can I do to eliminate all of such examples of unwanted
black bars
underneath some of the integral signs?
This sounds like the same known problem which was mentioned here some
time ago?
Check http://12000.org/my_notes/l2hwin/index.htm and look for
item (2) under "some errors and possible solutions"
Here it is:
"some of the bitmap images produced for the mathematics in the
document have a solid dark bar, usually at the bottom or the
side of the bitmap image. The reason for this is unknown.
But I found by trial and error that setting the following
values in my l2hconf.pm eliminated most if not all of these
$MATH_SCALE_FACTOR = 1.8;
$DISP_SCALE_FACTOR = 1.0;
"
Something to try to see if it will fix your problem.
--Nasser
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Julius O. Smith III <j...@ccrma.stanford.edu>
Prof. of Music and Assoc. Prof. (by courtesy) of Electrical Engineering
CCRMA, Stanford University
http://ccrma.stanford.edu/~jos/
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