# How to use percentiles on the X-axis?

I have a simple scatter plot.
Right now the `x`-axis is an array of strings.

I would like to change this so the x-axis is a percentile. So at 1/10th of the width of the graph it will show "10%, at half the width of the graph it will show “50%” and so on.

I think I found a slightly-hacky way to do it by looking at this: Formatting ticks in Python
But … I was wondering if there was a less hacky way to do this.

This is what I ended up doing, wish there was a better solution:

``````type TopKPlotProps = {
y: number[];
};

export default function TopKPlot({ y }: TopKPlotProps) {
const sortedY = y.sort((a, b) => a - b);
const x = _.range(0, sortedY.length);
const maxX = x[x.length - 1];
const oneTenthInterval = maxX / 10;

const tickvals = _.range(0, maxX, oneTenthInterval).concat([maxX]);
const ticktext = ["0%", "10%", "20%", "30%", "40%", "50%", "60%", "70%", "80%", "90%", "100%"];
invariant(tickvals.length === ticktext.length, `\${tickvals.length} !== \${ticktext.length}`);

const tickProps = {
tickmode: "array" as const,
tickvals,
ticktext,
};

const [plotState, setPlotState] = useState<PlotParams>({
data: [{ x, y, type: "scatter" }],
layout: {
autosize: true,
xaxis: tickProps,
},
});

return (
<Plot
useResizeHandler
style={{ width: "100%", height: "100%" }}
onUpdate={newPlotState => setPlotState(newPlotState as PlotParams)}
data={plotState.data}
layout={plotState.layout}
/>
);
}
``````