matplotlib-users Mailing List for matplotlib

> If I'm right, then the assertion in bar() is misformed.

I'd suggest the following. Works for me, anyway.  :-)

        if yerr is not None: assert (len(yerr)==nbars or (len(yerr)==2
and len(yerr[0])==len(yerr[1])==nbars)), 'bar() argument \'yerr\' must
be len(%s) (or a pair of such) or scalar' % lenarg

        if xerr is not None: assert (len(xerr)==nbars or (len(xerr)==2
and len(xerr[0])==len(xerr[1])==nbars)), 'bar() argument \'xerr\' must
be len(%s) (or a pair of such) or scalar' % lenarg

> -C
>
> On 11/6/06, John Hunter <jdh...@ni...> wrote:
> > >>>>> "Charles" == Charles R Twardy <ct...@gm...> writes:
> >
> >     Charles> Hi folks, It seems that 'bar' no longer supports
> >     Charles> asymmetric errorbars.  Am I meant to call both 'bar' and
> >     Charles> 'errorbar' if I want asymmetric errorbars on my
> >     Charles> histograms?  Is there a canonical idiom?
> >
> >     Charles> Sorry if I missed a previous answer to this.
> >
> > I don't use asymmetric error bars so don't have any ready test code,
> > but looking at the implementation, the xerr and yerr kwargs to bar are
> > passed on to errorbar after a bit of array conversion and length
> > checking.  Does this not work for you?  If not, can you send a snippet
> > of freestanding test code?
> >
> > Thanks,
> > JDH
> >
>
>
> --
> Charles R. Twardy
>


-- 
Charles R. Twardy

Hello All,

  I've been using matplotlib for some time now, and I want to connect it
  with zope. I'am using the example code from page:
http://www.scipy.org/Cookbook/Matplotlib/Matplotlib_and_Zope ,
but whenever I try to import matplotlib, and/or pylab packages i get
this error from zope:

Error Type: RuntimeError
Error Value: '/' is not a writable dir; you must set environment
variable HOME to be a writable dir

Have You got any ideas, on what might go wrong? I'am using matplotlib
0.87.4, and zope 2.9.5 with python 2.4.3 on gentoo linux box.

Thanks in advance for any help.

Marek Szczypinski

John et al,

I get this error, suggesting that yerr in bar() is not allowed to have
the same format as yerr in errorbar()
<<
if yerr is not None: assert len(yerr)==nbars, 'bar() argument \'yerr\'
must be len(%s) or scalar' % lenarg
>>

So this works:
  pylab.errorbar(xrange(5), [2,5,3,4,7], yerr=[[1,4,2,3,6],[4,10,6,8,14]])
But this does not:
  pylab.bar(xrange(5), [2,5,3,4,7], yerr=[[1,4,2,3,6],[4,10,6,8,14]])

Version 0.87.5 (Debian)

If I'm right, then the assertion in bar() is misformed.
-C

On 11/6/06, John Hunter <jdh...@ni...> wrote:
> >>>>> "Charles" == Charles R Twardy <ct...@gm...> writes:
>
>     Charles> Hi folks, It seems that 'bar' no longer supports
>     Charles> asymmetric errorbars.  Am I meant to call both 'bar' and
>     Charles> 'errorbar' if I want asymmetric errorbars on my
>     Charles> histograms?  Is there a canonical idiom?
>
>     Charles> Sorry if I missed a previous answer to this.
>
> I don't use asymmetric error bars so don't have any ready test code,
> but looking at the implementation, the xerr and yerr kwargs to bar are
> passed on to errorbar after a bit of array conversion and length
> checking.  Does this not work for you?  If not, can you send a snippet
> of freestanding test code?
>
> Thanks,
> JDH
>


-- 
Charles R. Twardy

On 11/10/06, Joris De Ridder <jo...@st...> wrote:
> Hi,
>
> We're trying (for the first time) to install matplotlib on OSX (Tiger on PPC Mac).
>
> Before we installed matplolib we ensured that BUILD_TKAGG    = 1 in setup.py.
> Then we typed 'python setup.py install' which went fine. Importing pylab goes fine,
> making a plot with pylab.plot() also works fine, but pylab.show() gives:
>
> alloc: invalid block: 0xa08bca0: a 1c 0
> Abort trap
>
> I guess this is a backend problem. Any pointers in which direction we can find
> a solution for this?
>
> We're using Python 2.4.1, Numpy 1.0,  TclTkAquaBI-8.4.10.0 and we're trying
> to install Matplotlib 0.87.7.

We recently posted OSX binaries.  Can you try one of those?