Hi folks, It seems that 'bar' no longer supports
> asymmetric errorbars. Am I meant to call both 'bar' and
> 'errorbar' if I want asymmetric errorbars on my
> histograms? Is there a canonical idiom?
> 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
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 <jdhunter@...8...> wrote:
> Hi folks, It seems that 'bar' no longer supports
> asymmetric errorbars. Am I meant to call both 'bar' and
> 'errorbar' if I want asymmetric errorbars on my
> histograms? Is there a canonical idiom?
> 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
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 <jdhunter@...8...> wrote:
>
> > Hi folks, It seems that 'bar' no longer supports
> > asymmetric errorbars. Am I meant to call both 'bar' and
> > 'errorbar' if I want asymmetric errorbars on my
> > histograms? Is there a canonical idiom?
>
> > 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