* m-graph.mkiv format bug
@ 2012-10-15 9:19 Alan BRASLAU
2012-10-15 10:08 ` Sietse Brouwer
0 siblings, 1 reply; 6+ messages in thread
From: Alan BRASLAU @ 2012-10-15 9:19 UTC (permalink / raw)
To: mailing list for ConTeXt users
There is a bug with format() as redefined in m-graph.mkiv
1e10 and 1e-10 truncate the tailing 0.
(I have not been able to fix the code...)
Alan
Minimal example:
\usemodule [graph]
\starttext
\startMPpage
label(format("@g","1e-10"),(0, 0)) ;
label(format("@g","1e+10"),(2cm, 0)) ;
label(format("@g","1e-12"),(0, -.5cm)) ;
label(format("@g","1e+12"),(2cm,-.5cm)) ;
\stopMPpage
\stoptext
___________________________________________________________________________________
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: m-graph.mkiv format bug 2012-10-15 9:19 m-graph.mkiv format bug Alan BRASLAU @ 2012-10-15 10:08 ` Sietse Brouwer 2012-10-15 10:27 ` Alan BRASLAU 0 siblings, 1 reply; 6+ messages in thread From: Sietse Brouwer @ 2012-10-15 10:08 UTC (permalink / raw) To: mailing list for ConTeXt users > There is a bug with format() as redefined in m-graph.mkiv > 1e10 and 1e-10 truncate the tailing 0. The function strip() is removing 0 throughout the exponent, and I don't know what purpose that might serve. If we never want to remove zeroes, this works: local function strip(s) - return "\\times10^{"..(s:gsub("%+*0*","")).."}" + return "\\times10^{"..(s:gsub("%+*","")).."}" end Note that if the exponent is zero the "× 10^0" will be left out completely, in both the old and the new strip() function. This seems to be by design. Illustration of this behaviour: \usemodule[graph] \starttext \startMPpage label(format("@g","1e+0"),(2cm,-1cm)) ; \stopMPpage \stoptext Cheers, Sietse On Mon, Oct 15, 2012 at 11:19 AM, Alan BRASLAU <alan.braslau@cea.fr> wrote: > There is a bug with format() as redefined in m-graph.mkiv > 1e10 and 1e-10 truncate the tailing 0. > (I have not been able to fix the code...) > > Alan > > Minimal example: > > \usemodule [graph] > > \starttext > \startMPpage > label(format("@g","1e-10"),(0, 0)) ; > label(format("@g","1e+10"),(2cm, 0)) ; > label(format("@g","1e-12"),(0, -.5cm)) ; > label(format("@g","1e+12"),(2cm,-.5cm)) ; > \stopMPpage > \stoptext > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the Wiki! > > maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context > webpage : http://www.pragma-ade.nl / http://tex.aanhet.net > archive : http://foundry.supelec.fr/projects/contextrev/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: m-graph.mkiv format bug 2012-10-15 10:08 ` Sietse Brouwer @ 2012-10-15 10:27 ` Alan BRASLAU 2012-10-15 10:45 ` Alan BRASLAU 0 siblings, 1 reply; 6+ messages in thread From: Alan BRASLAU @ 2012-10-15 10:27 UTC (permalink / raw) To: mailing list for ConTeXt users On Mon, 15 Oct 2012 12:08:30 +0200 Sietse Brouwer <sbbrouwer@gmail.com> wrote: > > There is a bug with format() as redefined in m-graph.mkiv > > 1e10 and 1e-10 truncate the tailing 0. > > The function strip() is removing 0 throughout the exponent, and I > don't know what purpose that might serve. If we never want to remove > zeroes, this works: > > local function strip(s) > - return "\\times10^{"..(s:gsub("%+*0*","")).."}" > + return "\\times10^{"..(s:gsub("%+*","")).."}" > end > > Note that if the exponent is zero the "× 10^0" will be left out > completely, in both the old and the new strip() function. This seems > to be by design. Illustration of this behaviour: > > \usemodule[graph] > \starttext > \startMPpage > label(format("@g","1e+0"),(2cm,-1cm)) ; > \stopMPpage > \stoptext Thanks, this "fixes" it for now, but I believe that the strip is intended to remove leading zeros, as in label(format("@g","1e+08"),(2cm,-1cm)) ; I suppose that the correct syntax must be something like the regex s/[+-]*0*\([1-9]\)/\1/ (not sure how to state this in lua gsub()...) Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: m-graph.mkiv format bug 2012-10-15 10:27 ` Alan BRASLAU @ 2012-10-15 10:45 ` Alan BRASLAU 2012-10-15 11:03 ` Sietse Brouwer 0 siblings, 1 reply; 6+ messages in thread From: Alan BRASLAU @ 2012-10-15 10:45 UTC (permalink / raw) To: mailing list for ConTeXt users On Mon, 15 Oct 2012 12:27:27 +0200 Alan BRASLAU <alan.braslau@cea.fr> wrote: > On Mon, 15 Oct 2012 12:08:30 +0200 > Sietse Brouwer <sbbrouwer@gmail.com> wrote: > > > > There is a bug with format() as redefined in m-graph.mkiv > > > 1e10 and 1e-10 truncate the tailing 0. > > > > The function strip() is removing 0 throughout the exponent, and I > > don't know what purpose that might serve. If we never want to remove > > zeroes, this works: > > > > local function strip(s) > > - return "\\times10^{"..(s:gsub("%+*0*","")).."}" > > + return "\\times10^{"..(s:gsub("%+*","")).."}" > > end > > > > Note that if the exponent is zero the "× 10^0" will be left out > > completely, in both the old and the new strip() function. This seems > > to be by design. Illustration of this behaviour: > > > > \usemodule[graph] > > \starttext > > \startMPpage > > label(format("@g","1e+0"),(2cm,-1cm)) ; > > \stopMPpage > > \stoptext > > > Thanks, this "fixes" it for now, > but I believe that the strip is intended to remove leading zeros, as > in label(format("@g","1e+08"),(2cm,-1cm)) ; > > I suppose that the correct syntax must be something like the regex > s/[+-]*0*\([1-9]\)/\1/ > (not sure how to state this in lua gsub()...) Figured it out (and we don't want to strip a leading minus sign): local function strip(s) return "\\times10^{"..(s:gsub("%+*0*([1-9])","%1")).."}" end Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: m-graph.mkiv format bug 2012-10-15 10:45 ` Alan BRASLAU @ 2012-10-15 11:03 ` Sietse Brouwer 2012-10-15 12:21 ` Alan BRASLAU 0 siblings, 1 reply; 6+ messages in thread From: Sietse Brouwer @ 2012-10-15 11:03 UTC (permalink / raw) To: Alan BRASLAU, mailing list for ConTeXt users, Hans Hagen Alan wrote: > Figured it out (and we don't want to strip a leading minus sign): > > local function strip(s) > return "\\times10^{"..(s:gsub("%+*0*([1-9])","%1")).."}" > end Better to anchor the pattern to the start of the string with `^` (and then the nonzerodigitmatching is no longer needed): gsub("^%+*0*", "") Otherwise, you'll get 805 --> 85. --Sietse On Mon, Oct 15, 2012 at 12:45 PM, Alan BRASLAU <alan.braslau@cea.fr> wrote: > On Mon, 15 Oct 2012 12:27:27 +0200 > Alan BRASLAU <alan.braslau@cea.fr> wrote: > >> On Mon, 15 Oct 2012 12:08:30 +0200 >> Sietse Brouwer <sbbrouwer@gmail.com> wrote: >> >> > > There is a bug with format() as redefined in m-graph.mkiv >> > > 1e10 and 1e-10 truncate the tailing 0. >> > >> > The function strip() is removing 0 throughout the exponent, and I >> > don't know what purpose that might serve. If we never want to remove >> > zeroes, this works: >> > >> > local function strip(s) >> > - return "\\times10^{"..(s:gsub("%+*0*","")).."}" >> > + return "\\times10^{"..(s:gsub("%+*","")).."}" >> > end >> > >> > Note that if the exponent is zero the "× 10^0" will be left out >> > completely, in both the old and the new strip() function. This seems >> > to be by design. Illustration of this behaviour: >> > >> > \usemodule[graph] >> > \starttext >> > \startMPpage >> > label(format("@g","1e+0"),(2cm,-1cm)) ; >> > \stopMPpage >> > \stoptext >> >> >> Thanks, this "fixes" it for now, >> but I believe that the strip is intended to remove leading zeros, as >> in label(format("@g","1e+08"),(2cm,-1cm)) ; >> >> I suppose that the correct syntax must be something like the regex >> s/[+-]*0*\([1-9]\)/\1/ >> (not sure how to state this in lua gsub()...) > > > Figured it out (and we don't want to strip a leading minus sign): > > local function strip(s) > return "\\times10^{"..(s:gsub("%+*0*([1-9])","%1")).."}" > end > > > Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: m-graph.mkiv format bug 2012-10-15 11:03 ` Sietse Brouwer @ 2012-10-15 12:21 ` Alan BRASLAU 0 siblings, 0 replies; 6+ messages in thread From: Alan BRASLAU @ 2012-10-15 12:21 UTC (permalink / raw) To: Sietse Brouwer; +Cc: mailing list for ConTeXt users, Hans Hagen On Mon, 15 Oct 2012 13:03:40 +0200 Sietse Brouwer <sbbrouwer@gmail.com> wrote: > Alan wrote: > > Figured it out (and we don't want to strip a leading minus sign): > > > > local function strip(s) > > return "\\times10^{"..(s:gsub("%+*0*([1-9])","%1")).."}" > > end > > Better to anchor the pattern to the start of the string with `^` (and > then the nonzerodigitmatching is no longer needed): > gsub("^%+*0*", "") > Otherwise, you'll get 805 --> 85. Thank you for the suggestion. Tried it, but this doesn't work, so I must be missing something... Of course, with MetaPost 2.0 we will certainly come across such a case with numbers like 1e805. :) Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-10-15 12:21 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-10-15 9:19 m-graph.mkiv format bug Alan BRASLAU 2012-10-15 10:08 ` Sietse Brouwer 2012-10-15 10:27 ` Alan BRASLAU 2012-10-15 10:45 ` Alan BRASLAU 2012-10-15 11:03 ` Sietse Brouwer 2012-10-15 12:21 ` Alan BRASLAU
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