In LineChart, how to have more bottom titles than spots?

[gdurandrexel]

I want to represent the evolution of a value during a month. I may not have a value for each day but I still want to display a bottom title for each day.
How to achieve that?

For instance, in the image below, I want a line that goes only through the spots with a non-zero value.

[gdurandrexel]

Well, of course, after searching for hours, I find the answer 5 minutes after asking the question...

In LineChartData: minX: 1, maxX: nbDaysInMonth.
And LineChart.titlesData.bottomTitles.sideTitles.interval:1 (just to be sure).