matplotlib-users Mailing List for matplotlib

Hi,

I have seen related issues recently on the mailing list. I have built 
the latest matplotlib from CVS in SuSE Linux 8.0 with gcc 3.3. The GTK 
backend works fine, but GTKAgg and TkAgg pop up a window but don't 
render the plot. Has anyone had the same problem?

Here is the output of ldd -r _tkagg.so

	libtk8.4.so => /usr/local/lib/libtk8.4.so (0x40003000)
	libtcl8.4.so => /usr/local/lib/libtcl8.4.so (0x400d2000)
	libpng.so.2 => /usr/lib/libpng.so.2 (0x40173000)
	libz.so.1 => /lib/libz.so.1 (0x401a5000)
	libstdc++.so.5 => /usr/local/lib/libstdc++.so.5 (0x401b4000)
	libm.so.6 => /lib/libm.so.6 (0x4026f000)
	libfreetype.so.6 => /usr/local/lib/libfreetype.so.6 (0x40292000)
	libgcc_s.so.1 => /usr/local/lib/libgcc_s.so.1 (0x402f6000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x402ff000)
	libc.so.6 => /lib/libc.so.6 (0x40316000)
	libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x4043e000)
	libdl.so.2 => /lib/libdl.so.2 (0x404fe000)
	/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)
undefined symbol: _Py_NoneStruct	(./_tkagg.so)
undefined symbol: Py_BuildValue	(./_tkagg.so)
undefined symbol: Py_InitModule4	(./_tkagg.so)
undefined symbol: PyArg_ParseTuple	(./_tkagg.so)


It looks like these 'undefined symbols' are not the cause of the 
problem; they are missing from every .so in my site-packages. They must 
be linked in at run time from somewhere else.

I see that in a previous post, you recommend to link in -lX11 -lXaw,
what exactly do you mean by that? To which command should those be appended?

Thanks in advance !
Dominique

>>>>> "Jon" == Jon Peirce <Jon...@no...> writes:

    Jon> Hi there!  I've been using the legend function in a plot but
    Jon> can't get the location setting to work. I've tried the
    Jon> numeric and string versions of the location codes and tried
    Jon> several backends (but only winXP, python 2.3.3). The legend
    Jon> always appears upper-right.

    Jon> Is this functionality platform-dependent?

No, in the 2 arg version legend(LABELS, LOC), the loc argument must be
a position arg, not be a kwarg.  Ie,

  plots.legend( ('test', ), 4)

works.  Note that the labels argument needs to be a list or tuple, not
a string as you gave, but this is not related to your problem.

The problem you experienced was due to the inadequate way I was using
introspection to determine which of the many call signatures legend
has.  There is an easy fix which gets it right in the case where loc
is a kwarg.

In axes.Aces.legend, replace

        loc = 1
with
        loc = kwargs.get('loc', 1)

as the first line after the doc string.

Hope this helps,
JDH

Hi there!

I've been using the legend function in a plot but can't get the location 
setting to work. I've tried the numeric and string versions of the 
location codes and tried several backends (but only winXP, python 
2.3.3). The legend always appears upper-right.

Is this functionality platform-dependent?

#----------------------------------------------
import matplotlib.matlab as plots
import Numeric as num

x = num.arange(10)
plots.plot(x,x)
plots.legend('test',loc=4)
plots.show()
#----------------------------------------------

-- 
Jon Peirce
Nottingham University
+44 (0)115 8467176 (tel)
+44 (0)115 9515324 (fax)

http://www.psychology.nottingham.ac.uk/staff/jwp/


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