How to have custom text for labels

[rpivovar-godaddy]

I have charts which can have only two values along the y-axis: 0 or 1. Currently the y-axis labels are these two numbers, but I'd like to instead change the labels to say "Up" and "Down".

Is there a way to do this?

[mbostock]

One way to do this is to use the y-scale tickFormat option:

Plot.plot({
  y: {
    tickFormat: d => d ? "Up" : "Down"
  },
  marks: …
})

[rpivovar-godaddy]

That worked -- thanks!