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Fix Scale on Visualforce Chart

Is there any way to fix a scale and scale interval on a visualforce chart? I'm plotting a bar series that looks like:


x           y

-30       1

-20       5

-10       8

+10      3

+20      4

+30      6


It anchors the vertical barchart y axis scale at 1 and the top at 9, therefore, there is no bar shown for the first point at x=-30. I guess in a series starting at x=0 you could add another element at 0,0, but that doesn't work here. I can' t see any way in the documentation to set the scale, I also have the case where they y-values need to be whole numbers, yet it shows the scale in increments of 0.5,



Best Answer chosen by Admin (Salesforce Developers) 

Never mind. The answer is the miniumum, maximum and steps attributes on <apex:axis>. Somehow I missed it.