Re: Stacked bar plot legend reversed

[Ben Abbott]

On Jan 4, 2012, at 8:29 PM, Shaun Jackman wrote:

> On Wed, 2012-01-04 at 17:22 -0800, Ben Abbott wrote:
>> On Jan 4, 2012, at 3:45 PM, Shaun Jackman wrote:
>> 
>>> Hi,
>>> 
>>> When drawing a stacked bar plot with a legend, the data is drawn from
>>> bottom to top, whereas the legend is drawn from top to bottom, which
>>> isn't exactly intuitive. Is there any way to reverse the order of the
>>> legend?
>>> 
>>> For example, the following snippet draws the Oranges data stacked on top
>>> of Apples, but the legend will read from top to bottom Apples and then
>>> Oranges:
>>> 
>>> h = [1 2; 3 4]
>>> bar(h, 'stacked')
>>> legend('Apples', 'Oranges')
>>> 
>>> Thanks,
>>> Shaun
>> 
>> Flipping the order of the axes children will have the effect you want.
>> 
>>      h = [1 2; 3 4]
>>      bar(h, 'stacked')
>>      legend('Apples', 'Oranges', 'location', 'northwest')
>>      set (gca, 'children', flipud (get (gca, 'children')))
>> 
>> Ben
> 
> Hi Ben,
> 
> Thanks for the suggestion. With Octave 3.2.3, I get the following error
> message:
> 
> octave:1> h = [1 2; 3 4];
> octave:2> bar(h, 'stacked')
> octave:3> legend('Apples', 'Oranges', 'location', 'northwest')
> octave:4> set (gca, 'children', flipud (get (gca, 'children')))
> error: set: new children must be a permutation of existing children
> 
> Cheers,
> Shaun

Shaun,

It appears you've found a bug in 3.2.3.

Upgrading to a newer version of Octave should solve your problem.

We're about the release version 3.6.0. Since 3.2.3, we've released 3.2,4, 
3.4.0, 3.4.1, 3.4.2, and 3.4.3.

There may be a way to work around the bug, but I don't have a 3.2.x version to 
experiment with.

Ben