Re: [Matplotlib-users] Errorbars not drawn correctly in logarithmic scales

[Wolfgang D. <wdr...@dr...>]

On Mon, 12 Mar 2012 15:51:15 -0500
Benjamin Root <ben...@ou...> wrote:

> Ah, finally figured it out.  The issue is that your y-value for that
> error bar is 9.114, but you want to plot error bars that are
> +/-10.31.  That line gets thrown out by matplotlib because you can't
> plot at negative values for log scale.

Yes, I came to the same conclusion. I think matplotlib should print
some warning or raise some exception if confronted with data like that,
it can't handle.

> There is a trick that might
> work.  The set_yscale method has a kwarg "nonposy" which could be set
> to "clip".  You could also try setting to the "symlog" scale which
> might let you get away with a negative value.

I'll try that.


Thanks

Wolfgang