D3.js Scale Doesn't Place Tick At The Top

I am currently working on a stacked bar chart, and I'm having a problem with the axis labels. The labels look fine at first blush, but I noticed that there is not always a tick at

Solution 1:

Take a look at the .nice function

https://github.com/mbostock/d3/wiki/Quantitative-Scales#wiki-linear_nice