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Specify histogram thresholds in fixed-length array (#1086)

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* Specify histogram thresholds in fixed-length array

Fixes https://github.com/chanzuckerberg/cellxgene/issues/1082

For background, see the following:
* https://github.com/d3/d3-array/issues/46
* https://stackoverflow.com/questions/15880058/d3-js-ticks-function-giving-more-elements-than-needed

* Oops, off by one!
This commit is contained in:
Matt Weiden
2020-01-06 11:13:02 -08:00
committed by GitHub
parent b172ff7f15
commit 4c1ecf9e52
3 changed files with 21 additions and 2 deletions
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client/src/util/range.js
+5
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@@ -43,3 +43,8 @@ export function range(start, stop, step) {
const len = Math.max(Math.ceil((stop - start) / step), 0);
return _doFill(new Array(len), start, step, len);
}
export function linspace(start, stop, nsteps) {
const delta = (stop - start) / (nsteps - 1).toFixed();
return range(0, nsteps, 1).map(i => start + i * delta);
}