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alexcjohnsonalexcjohnson
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factor out bin_label_vals so histogram2d can use it too
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‎src/traces/histogram/bin_label_vals.js

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/**
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* Copyright 2012-2017, Plotly, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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'use strict';
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var numConstants = require('../../constants/numerical');
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var oneYear = numConstants.ONEAVGYEAR;
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var oneMonth = numConstants.ONEAVGMONTH;
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var oneDay = numConstants.ONEDAY;
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var oneHour = numConstants.ONEHOUR;
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var oneMin = numConstants.ONEMIN;
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var oneSec = numConstants.ONESEC;
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var tickIncrement = require('../../plots/cartesian/axes').tickIncrement;
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/*
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* make a function that will find rounded bin edges
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* @param {number} leftGap: how far from the left edge of any bin is the closest data value?
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* @param {number} rightGap: how far from the right edge of any bin is the closest data value?
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* @param {Array[number]} binEdges: the actual edge values used in binning
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* @param {object} pa: the position axis
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* @param {string} calendar: the data calendar
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*
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* @return {function(v, isRightEdge)}:
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* find the start (isRightEdge is falsy) or end (truthy) label value for a bin edge `v`
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*/
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module.exports = function getBinSpanLabelRound(leftGap, rightGap, binEdges, pa, calendar) {
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// the rounding digit is the largest digit that changes in *all* of 4 regions:
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// - inside the rightGap before binEdges[0] (shifted 10% to the left)
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// - inside the leftGap after binEdges[0] (expanded by 10% of rightGap on each end)
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// - same for binEdges[1]
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var dv0 = -1.1 * rightGap;
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var dv1 = -0.1 * rightGap;
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var dv2 = leftGap - dv1;
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var edge0 = binEdges[0];
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var edge1 = binEdges[1];
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var regions = [
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[edge0 + dv0, edge0 + dv1],
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[edge0 + dv1, edge0 + dv2],
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[edge1 + dv0, edge1 + dv1],
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[edge1 + dv1, edge1 + dv2]
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];
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var digit = Infinity;
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for(var i = 0; i < regions.length; i++) {
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digit = Math.min(digit, biggestDigitChanged(regions[i], pa, calendar));
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}
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if(pa.type === 'date' && digit > oneDay) {
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var dashExclude = (digit === oneYear) ? 1 : 6;
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var increment = (digit === oneYear) ? 'M12' : 'M1';
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return function(v, isRightEdge) {
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var dateStr = pa.c2d(v, oneYear, calendar);
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var dashPos = dateStr.indexOf('-', dashExclude);
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if(dashPos > 0) dateStr = dateStr.substr(0, dashPos);
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var roundedV = pa.d2c(dateStr, calendar);
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if(roundedV < v) {
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var nextV = tickIncrement(roundedV, increment, false, calendar);
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if((roundedV + nextV) / 2 < v + leftGap) roundedV = nextV;
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}
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if(isRightEdge) {
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return tickIncrement(roundedV, increment, true, calendar);
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}
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return roundedV;
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};
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}
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return function(v, isRightEdge) {
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var roundedV = digit * Math.round(v / digit);
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// if we rounded down and we could round up and still be < leftGap
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// (or what leftGap values round to), do that
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// TODO: is the `digit / 2` correct or is that too much leeway?
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if(roundedV + (digit / 10) < v && roundedV + (digit * 0.9) < v + leftGap) {
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roundedV += digit;
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}
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// finally for the right edge back off one digit - but only if we can do that
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// and not clip off any data that's potentially in the bin
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if(isRightEdge) {
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roundedV -= digit;
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}
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return roundedV;
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};
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};
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/*
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* Find the largest digit that changes within a (calcdata) region [v1, v2]
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* if dates, "digit" means date/time part when it's bigger than a second
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* returns the unit value to round to this digit, eg 0.01 to round to hundredths, or
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* 100 to round to hundreds. returns oneMonth or oneYear for month or year rounding,
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* so that Math.min will work, rather than 'M1' and 'M12'
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*/
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function biggestDigitChanged(region, pa, calendar) {
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var v1 = region[0];
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var v2 = region[1];
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// are we crossing zero? can't say anything.
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// in principle this doesn't apply to dates but turns out this doesn't matter.
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if(v1 * v2 <= 0) return Infinity;
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var dv = Math.abs(v2 - v1);
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var isDate = pa.type === 'date';
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var digit = biggestGuaranteedDigitChanged(dv, isDate);
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// see if a larger digit also changed
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for(var i = 0; i < 10; i++) {
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// numbers: next digit needs to be >10x but <100x then gets rounded down.
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// dates: next digit can be as much as 60x (then rounded down)
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var nextDigit = biggestGuaranteedDigitChanged(digit * 80, isDate);
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// if we get to years, the chain stops
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if(digit === nextDigit) break;
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if(didDigitChange(nextDigit, v1, v2, isDate, pa, calendar)) digit = nextDigit;
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else break;
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}
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return digit;
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}
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/*
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* Find the largest digit that *definitely* changes in a region [v, v + dv] for any v
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* for nonuniform date regions (months/years) pick the largest
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*/
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function biggestGuaranteedDigitChanged(dv, isDate) {
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if(isDate && dv > oneSec) {
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// this is supposed to be the biggest *guaranteed* change
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// so compare to the longest month and year across any calendar,
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// (TODO: does 1.1 do that? I think so...)
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// and we'll iterate back up later
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// note: does not support rounding larger than one year. We could add
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// that if anyone wants it, but seems unusual and not strictly necessary.
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if(dv > oneDay) {
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if(dv > oneYear * 1.1) return oneYear;
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if(dv > oneMonth * 1.1) return oneMonth;
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return oneDay;
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}
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if(dv > oneHour) return oneHour;
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if(dv > oneMin) return oneMin;
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return oneSec;
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}
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return Math.pow(10, Math.floor(Math.log(dv) / Math.LN10));
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}
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function didDigitChange(digit, v1, v2, isDate, pa, calendar) {
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if(isDate && digit > oneDay) {
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var dateParts1 = dateParts(v1, pa, calendar);
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var dateParts2 = dateParts(v2, pa, calendar);
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var parti = (digit === oneYear) ? 0 : 1;
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return dateParts1[parti] !== dateParts2[parti];
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}
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return Math.floor(v2 / digit) - Math.floor(v1 / digit) > 0.1;
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}
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function dateParts(v, pa, calendar) {
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var parts = pa.c2d(v, oneYear, calendar).split('-');
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if(parts[0] === '') {
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parts.unshift();
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parts[0] = '-' + parts[0];
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}
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return parts;
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}

‎src/traces/histogram/calc.js

Lines changed: 2 additions & 155 deletions
Original file line numberDiff line numberDiff line change
@@ -19,13 +19,8 @@ var binFunctions = require('./bin_functions');
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var normFunctions = require('./norm_functions');
2020
var doAvg = require('./average');
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var cleanBins = require('./clean_bins');
22-
var numConstants = require('../../constants/numerical');
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var oneYear = numConstants.ONEAVGYEAR;
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var oneMonth = numConstants.ONEAVGMONTH;
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var oneDay = numConstants.ONEDAY;
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var oneHour = numConstants.ONEHOUR;
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var oneMin = numConstants.ONEMIN;
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var oneSec = numConstants.ONESEC;
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var oneMonth = require('../../constants/numerical').ONEAVGMONTH;
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var getBinSpanLabelRound = require('./bin_label_vals');
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module.exports = function calc(gd, trace) {
@@ -201,154 +196,6 @@ module.exports = function calc(gd, trace) {
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return cd;
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};
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204-
/*
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* make a function that will find rounded bin edges
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* @param {number} leftGap: how far from the left edge of any bin is the closest data value?
207-
* @param {number} rightGap: how far from the right edge of any bin is the closest data value?
208-
* @param {Array[number]} binEdges: the actual edge values used in binning
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* @param {object} pa: the position axis
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* @param {string} calendar: the data calendar
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*
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* @return {function(v, isRightEdge)}:
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* find the start (isRightEdge is falsy) or end (truthy) label value for a bin edge `v`
214-
*/
215-
function getBinSpanLabelRound(leftGap, rightGap, binEdges, pa, calendar) {
216-
// the rounding digit is the largest digit that changes in *all* of 4 regions:
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// - inside the rightGap before binEdges[0] (shifted 10% to the left)
218-
// - inside the leftGap after binEdges[0] (expanded by 10% of rightGap on each end)
219-
// - same for binEdges[1]
220-
var dv0 = -1.1 * rightGap;
221-
var dv1 = -0.1 * rightGap;
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var dv2 = leftGap - dv1;
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var edge0 = binEdges[0];
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var edge1 = binEdges[1];
225-
var regions = [
226-
[edge0 + dv0, edge0 + dv1],
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[edge0 + dv1, edge0 + dv2],
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[edge1 + dv0, edge1 + dv1],
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[edge1 + dv1, edge1 + dv2]
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];
231-
var digit = Infinity;
232-
for(var i = 0; i < regions.length; i++) {
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digit = Math.min(digit, biggestDigitChanged(regions[i], pa, calendar));
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}
235-
236-
if(pa.type === 'date' && digit > oneDay) {
237-
var dashExclude = (digit === oneYear) ? 1 : 6;
238-
var increment = (digit === oneYear) ? 'M12' : 'M1';
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240-
return function(v, isRightEdge) {
241-
var dateStr = pa.c2d(v, oneYear, calendar);
242-
var dashPos = dateStr.indexOf('-', dashExclude);
243-
if(dashPos > 0) dateStr = dateStr.substr(0, dashPos);
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var roundedV = pa.d2c(dateStr, calendar);
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246-
if(roundedV < v) {
247-
var nextV = Axes.tickIncrement(roundedV, increment, false, calendar);
248-
if((roundedV + nextV) / 2 < v + leftGap) roundedV = nextV;
249-
}
250-
251-
if(isRightEdge) {
252-
return Axes.tickIncrement(roundedV, increment, true, calendar);
253-
}
254-
255-
return roundedV;
256-
};
257-
}
258-
259-
return function(v, isRightEdge) {
260-
var roundedV = digit * Math.round(v / digit);
261-
// if we rounded down and we could round up and still be < leftGap
262-
// (or what leftGap values round to), do that
263-
// TODO: is the `digit / 2` correct or is that too much leeway?
264-
if(roundedV < v && roundedV + (digit / 2) < v + leftGap) {
265-
roundedV += digit;
266-
}
267-
// finally for the right edge back off one digit - but only if we can do that
268-
// and not clip off any data that's potentially in the bin
269-
if(isRightEdge) {
270-
roundedV -= digit;
271-
}
272-
return roundedV;
273-
};
274-
}
275-
276-
/*
277-
* Find the largest digit that changes within a (calcdata) region [v1, v2]
278-
* if dates, "digit" means date/time part when it's bigger than a second
279-
* returns the unit value to round to this digit, eg 0.01 to round to hundredths, or
280-
* 100 to round to hundreds. returns oneMonth or oneYear for month or year rounding,
281-
* so that Math.min will work, rather than 'M1' and 'M12'
282-
*/
283-
function biggestDigitChanged(region, pa, calendar) {
284-
var v1 = region[0];
285-
var v2 = region[1];
286-
287-
// are we crossing zero? can't say anything.
288-
// in principle this doesn't apply to dates but turns out this doesn't matter.
289-
if(v1 * v2 <= 0) return Infinity;
290-
291-
var dv = Math.abs(v2 - v1);
292-
var isDate = pa.type === 'date';
293-
var digit = biggestGuaranteedDigitChanged(dv, isDate);
294-
// see if a larger digit also changed
295-
for(var i = 0; i < 10; i++) {
296-
// numbers: next digit needs to be >10x but <100x then gets rounded down.
297-
// dates: next digit can be as much as 60x (then rounded down)
298-
var nextDigit = biggestGuaranteedDigitChanged(digit * 80, isDate);
299-
// if we get to years, the chain stops
300-
if(digit === nextDigit) break;
301-
if(didDigitChange(nextDigit, v1, v2, isDate, pa, calendar)) digit = nextDigit;
302-
else break;
303-
}
304-
return digit;
305-
}
306-
307-
/*
308-
* Find the largest digit that *definitely* changes in a region [v, v + dv] for any v
309-
* for nonuniform date regions (months/years) pick the largest
310-
*/
311-
function biggestGuaranteedDigitChanged(dv, isDate) {
312-
if(isDate && dv > oneSec) {
313-
// this is supposed to be the biggest *guaranteed* change
314-
// so compare to the longest month and year across any calendar,
315-
// (TODO: does 1.1 do that? I think so...)
316-
// and we'll iterate back up later
317-
// note: does not support rounding larger than one year. We could add
318-
// that if anyone wants it, but seems unusual and not strictly necessary.
319-
if(dv > oneDay) {
320-
if(dv > oneYear * 1.1) return oneYear;
321-
if(dv > oneMonth * 1.1) return oneMonth;
322-
return oneDay;
323-
}
324-
325-
if(dv > oneHour) return oneHour;
326-
if(dv > oneMin) return oneMin;
327-
return oneSec;
328-
}
329-
return Math.pow(10, Math.floor(Math.log(dv) / Math.LN10));
330-
}
331-
332-
function didDigitChange(digit, v1, v2, isDate, pa, calendar) {
333-
if(isDate && digit > oneDay) {
334-
var dateParts1 = dateParts(v1, pa, calendar);
335-
var dateParts2 = dateParts(v2, pa, calendar);
336-
var parti = (digit === oneYear) ? 0 : 1;
337-
return dateParts1[parti] !== dateParts2[parti];
338-
339-
}
340-
return Math.floor(v2 / digit) - Math.floor(v1 / digit) > 0.1;
341-
}
342-
343-
function dateParts(v, pa, calendar) {
344-
var parts = pa.c2d(v, oneYear, calendar).split('-');
345-
if(parts[0] === '') {
346-
parts.unshift();
347-
parts[0] = '-' + parts[0];
348-
}
349-
return parts;
350-
}
351-
352199
/*
353200
* calcAllAutoBins: we want all histograms on the same axes to share bin specs
354201
* if they're grouped or stacked. If the user has explicitly specified differing

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