GNOME Bugzilla – Bug 708649
Horrible ring plot display
Last modified: 2018-05-22 14:05:08 UTC
Created attachment 255589 [details] Terrible looking ring plot Oh boy, last night I needed to create a ring plot. After entering the corresponding data and creating the chart I thought I was dreaming! Do you really think I can present this horrible locking graph to someone? (See attached screen shot.) By all means - This should be corrected as soon as possible! Or is there anything preventing you in doing so? I'm looking forward to your answer. Bye Dieter
Avoid splitting ring plots, they always look like that.
@Dieter, I would be interested in knowing what do you think the plot should look like?
One could, I think, increase the radius over of the outer pieces by the split amount, i.e., cut the pieces from a larger circle.
Splitting a ring does not change its radius. Of course, we might add a new parameter to change the ring radius before splitting. Btw, saving to .ods (strict) or .xls and reopening in LO does not give the expected plot.
@jean: what do you expoect to see on ods export and opening by LO? As far as I can tell the Open Document Format has no native way to specify that a ring should be 'split'.
Andreas, the series appear in reverse order.
It seems that both Gnumeric and LO makes a mistake: ODF says: By default, the first series of class ring forms the inner ring and the last series forms the outermost ring. To arrange the rings in opposite order the attribute chart:reverse-direction is set to "true" at the x-axis. The file uses the default so LO renders the series in incorrect order. ODF says: By default, segments are arranged counter clockwise starting at 12 o'clock. To arrange the segments in clockwise order the attribute chart:reverse-direction at the y-axis is set to "true". The file uses the default so we should also load the file in the other direction (or write the chart:reverse-direction=true attribute for the y-axis).
Created attachment 255911 [details] Exploded OpenOffice Ring Plot
So the OpenOffice ring plot has the same problem: The distance between a piece of "exploded" outer ring and the next inner ring varies from end to end. It is just not as obvious since the (useless) 3d effects hides most information.
The radius is the same for all pieces from the same ring. Which looks somewhat logic. Excel does the same thing, and we, as well as OOo and LO, need to have some compatibility with it.
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