I've spent enough time modifying the stacked bar chart sample that it would be wise to get a second pair of eyes to look at what I'm doing wrong. The modified sample is in a js fiddle .
My main changes are these:
1: On line 10 reversed the array for range y = d3.scale.linear().range([height, 0])
2: On lines 17 and 22 added axis
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(format);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
3: Line 62 changed the addition of y0 and y (this is the change that might be creating problem)
.attr("y", function (d) { return y(d.y) - y(d.y0); })
As you can see bars are going way above the specified height.
If someone could tell me what I'm doing wrong I'd be very thankful. I spent too much time looking just by myself. I do think I'm very close as chart is displaying other than the height problem.
There is one more change, which you haven't mentioned: that you the chart containing g
is now translated to the top-left point instead of the bottom-left point, as was in the original plot.
Changing the following two lines around the line you mentioned will solve the problem:
.attr("y", function (d) { return y(d.y + d.y0); })
.attr("height", function (d) { return y(d.y0) - y(d.y +d.y0); })
This is how I generally do these calculations with an inverted scale such as y = d3.scale.linear().range([height, 0])
:
Here, the point S(y + y0)
will be the value of the point closer to the top
, or with the lower y
value, and the height
of the bar will be = S(y0) - S(y + y0)
or = abs(S(y0+y) - S(y0))
, whichever you find more palatable.
However, to be honest, there is plenty of trial and error involved before I actually draw this down. Then I do more trial and error to find the solution and convince myself that this drawing helped.
So ... your mileage might vary. :)
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