highcharts, Set minimum height for stacked column chart? - highcharts

Question

I have a 3D stacked column chart.
If there is some larger values in the data, the small values will not be shown in the chart.
As you can see in
http://jsfiddle.net/43pv1a2q/6/
series: [{
name: 'John',
data: [500, 3, 4, 7, 2], //If change 500 to 5, all blocks will be shown
stack: 'male'
}, {
name: 'Joe',
data: [300, 4, 4, 2, 5], //change 300 to 3
stack: 'male'
},
{
name: 'Tom',
data: [500, 3, 4, 7, 2], // change 500 to 5
stack: 'male'
}]
The minPointLength works with bar chart, but not with stacked column chart.
https://api.highcharts.com/highcharts/series.columnrange.minPointLength
How do you set a minimum height for the block in a stacked column?

Answer 1

It seems to be a bug. You can report it here: https://github.com/highcharts/highcharts/issues
Workaround:
I update every point using a new value if its original y value is less than 50 (threshold) and save the original value in realValue property. Then I manually compute the cumulative values for every stack in tooltip.pointFormatter so that the viewer sees proper values:
events: {
load: function() {
var chart = this,
minColHeightVal = 50;
chart.series.forEach(function(s) {
s.points.forEach(function(p) {
if (p.y < minColHeightVal) {
p.update({
y: minColHeightVal,
realValue: p.y
}, false);
}
});
});
chart.redraw();
}
}
// (...)
pointFormatter: function() {
var stackSum = 0,
point = this,
chart = point.series.chart;
chart.series.forEach(function(s) {
s.points.forEach(function(p) {
if (p.x === point.x) {
stackSum += p.realValue ? p.realValue : p.y
}
});
});
return '<span style="color:' + this.color + '">\u25CF</span> ' + this.series.name + ': ' + (point.realValue ? point.realValue : point.y) + ' / ' + stackSum;
}
Live demo: http://jsfiddle.net/kkulig/j3toufk9/

Answer 2

The solution might be to set the y-axis to type: logarithmic, like so: http://jsfiddle.net/43pv1a2q/8/
yAxis: {
type: 'logarithmic',
allowDecimals: false,
title: {
text: 'Number of fruits',
skew3d: true
}
},
The only change I've made is to set "type: 'logarithmic' and removed "min: 0". I can't think of any other way to achieve what you're looking for when working with such hugely different numbers.
EDIT: Of course, you can still use "min: X" to set minimum value on the y-axis; I just removed it because it was unnecessary when I wanted minimum to default.