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Re: [Matplotlib-users] default mathtext font
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From: Eli B. <eb...@gm...> - 2008-08-03 00:27:50
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Thank you Michael,
I tried switching the matplotlib font to Dejavu Sans but it also does not
seem to recognize the lunate epsilon ϵ.
When I wrote title(u'ϵ-Fe'), it printed ε-Fe instead.
I tried several other fonts but the problem did not disappear.
It seems that the bes choice after all is to write r'$\rm{\epsilon-Fe}$'.
Thanks again
Eli
On Thu, Jul 31, 2008 at 9:03 AM, Michael Droettboom <md...@st...> wrote:
> (Sorry for the delay -- just back from vacation)
>
> It looks like the default Vera Sans font that matplotlib uses doesn't
> actually have the lunate epsilon character. If you have it installed, you
> could have matplotlib use the DejaVu Sans font instead (which is essentially
> Vera Sans with a larger set of characters).
>
> In your matplotlibrc, set font.sans to DejaVu Sans
>
> Cheers,
> Mike
>
> Eli Brosh wrote:
>
>> Thanks,
>> This unicode thing works like magic.
>> The only thing I am still unable to do is to insert the symbol \epsilon
>> (as distinct from \varepsilon).
>> For some reason, the varepsilon ε is printed fine, but a blank square is
>> printed instead of the lunate epsilon ϵ.
>> That is u' ε ' works, while u' ϵ' does not.
>>
>> Any idea why this is happening ?
>>
>> Eli
>>
>>
>> 2008/7/22 Michael Droettboom <md...@st... <mailto:md...@st...>>:
>>
>> Yes, you would put it at the top of your .py file.
>>
>> In order to use Unicode in Python source code, you have to tell
>> the Python interpreter what encoding the file is in. That's done
>> with a little "magic" comment at the top of the file. The popular
>> Unixy editors (emacs, vim etc.) also understand this comment and
>> will save the file correctly. Possibly other editors do as well.
>>
>> For more gory details that you probably need, see this:
>>
>> http://www.amk.ca/python/howto/unicode
>>
>> particularly the section "Unicode Literals in Python Source Code".
>>
>>
>> Cheers,
>> Mike
>>
>> Eli Brosh wrote:
>>
>> Thanks,
>> This seems to be a solution.
>> I have an editor that supports unicode.
>> But, can you please explain better how do I make the coding
>> directive at the top of my source files ?
>> Where do I write the command:
>> # -*- coding: utf-8 -*-
>>
>> Is it inside the python script ?
>>
>>
>> Sorry for the ignorance.
>> Eli
>>
>> On Tue, Jul 22, 2008 at 10:14 AM, Michael Droettboom
>> <md...@st... <mailto:md...@st...>
>> <mailto:md...@st... <mailto:md...@st...>>> wrote:
>>
>> As an alternative, you could just use Unicode to insert the
>> Greek
>> characters:
>>
>> r"α-Fe (Someone 2003)"
>>
>> The default font used by matplotlib, Vera Sans, includes a full
>> set of Greek characters. This, of course, requires an
>> editor that
>> supports Unicode and a coding directive at the top of your
>> source
>> files, eg.:
>>
>> # -*- coding: utf-8 -*-
>>
>>
>> Cheers,
>> Mike
>>
>> Eli Brosh wrote:
>>
>> Here is the use case I have in mind:
>> Plotting properties of various phases of iron, I need a
>> legend
>> with greek letters and normal text:
>> \alpha-Fe, Someone (2003)
>>
>> Now, I need the names e.g. someone to be upright.
>> Also, the relbar between \alpha and Fe is shorter with
>> normal
>> text fonts than with italics.
>>
>> I can solve the problem by using r'\rm{\alpha-Fe, Someone
>> (2003)}' but it would be easier if I could just change the
>> defaults.
>>
>> Eli
>>
>>
>> On Mon, Jul 21, 2008 at 6:21 PM, Michael Droettboom
>> <md...@st... <mailto:md...@st...>
>> <mailto:md...@st... <mailto:md...@st...>>
>> <mailto:md...@st... <mailto:md...@st...>
>> <mailto:md...@st... <mailto:md...@st...>>>> wrote:
>>
>> Unfortunately there isn't. This is *theoretically*
>> possible
>> with
>> the STIX fonts, but that hasn't been implemented.
>> However, with
>> the Computer Modern fonts, many of the glyphs simply
>> aren't
>> present (upright Greek, for example) to make this
>> happen.
>>
>> That said, I'm not sure this is necessarily a good idea.
>> Math has
>> a set of commonly accepted conventions about when to
>> use italic
>> vs. upright that may only confuse the reader when
>> not followed.
>> Can you provide a use case?
>>
>> Cheers,
>> Mike
>>
>> Eli Brosh wrote:
>>
>> Hello
>> I there a way to change the default mathtext
>> font from
>> cal to rm ?
>> I would like to use the rm (serif) font without
>> stating
>> rm{...} or mathrm{...}.
>> Is it possible to do using the matplotlibrc ?
>> can you give me an example of how this is done ?
>>
>> Thanks
>> Eli
>>
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>>
>> -- Michael Droettboom
>> Science Software Branch
>> Operations and Engineering Division
>> Space Telescope Science Institute
>> Operated by AURA for NASA
>>
>>
>>
>> -- Michael Droettboom
>> Science Software Branch
>> Operations and Engineering Division
>> Space Telescope Science Institute
>> Operated by AURA for NASA
>>
>>
>>
> --
> Michael Droettboom
> Science Software Branch
> Operations and Engineering Division
> Space Telescope Science Institute
> Operated by AURA for NASA
>
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