[reportlab-users] Skip empty bars when drawing

[Robin Becker]

Hi Dimitri,

looking at your chart it seems as though you would like to drop space when some or all bars in a category are missing.

Clearly if all bars are missing for a category then you can just drop the category; I don't believe we allow categories 
to vary in width. So if there are normally four bars in a group you will always get the same four bar width for the 
category even if only three bars are present.

Your could reduce wasted space by using a stacking bar chart eg setting the categoryAxis.style = 'stacked'. That way 
each category only gets on bar width.

It should be possible to make a category axis behave in the way you want, but we haven't done it yet :(



On 12/11/2019 19:19, Dimitri Vasilkov wrote:
> Hello,
> 
> I am using reportlab to create a bar graph of downloads, where the category
> is the download name and each bar is the number of downloads for a
> particular format. If a particular format has not been downloaded, it has a
> corresponding value of None. Since there are a lot of download formats that
> have no downloads and some that have several, there are big gaps between
> the bars as you can see in this image:
> 
........
.......

-- 
Robin Becker