import “../arrays/range”; import “../core/rebind”; import “../interpolate/interpolate”; import “../interpolate/round”; import “../interpolate/uninterpolate”; import “../format/format”; import “bilinear”; import “nice”; import “polylinear”; import “scale”;
d3.scale.linear = function() {
return d3_scale_linear([0, 1], [0, 1], d3_interpolate, false);
};
function d3_scale_linear(domain, range, interpolate, clamp) {
var output, input; function rescale() { var linear = Math.min(domain.length, range.length) > 2 ? d3_scale_polylinear : d3_scale_bilinear, uninterpolate = clamp ? d3_uninterpolateClamp : d3_uninterpolateNumber; output = linear(domain, range, uninterpolate, interpolate); input = linear(range, domain, uninterpolate, d3_interpolate); return scale; } function scale(x) { return output(x); } // Note: requires range is coercible to number! scale.invert = function(y) { return input(y); }; scale.domain = function(x) { if (!arguments.length) return domain; domain = x.map(Number); return rescale(); }; scale.range = function(x) { if (!arguments.length) return range; range = x; return rescale(); }; scale.rangeRound = function(x) { return scale.range(x).interpolate(d3_interpolateRound); }; scale.clamp = function(x) { if (!arguments.length) return clamp; clamp = x; return rescale(); }; scale.interpolate = function(x) { if (!arguments.length) return interpolate; interpolate = x; return rescale(); }; scale.ticks = function(m) { return d3_scale_linearTicks(domain, m); }; scale.tickFormat = function(m, format) { return d3_scale_linearTickFormat(domain, m, format); }; scale.nice = function(m) { d3_scale_linearNice(domain, m); return rescale(); }; scale.copy = function() { return d3_scale_linear(domain, range, interpolate, clamp); }; return rescale();
}
function d3_scale_linearRebind(scale, linear) {
return d3.rebind(scale, linear, "range", "rangeRound", "interpolate", "clamp");
}
function d3_scale_linearNice(domain, m) {
return d3_scale_nice(domain, d3_scale_niceStep(m ? d3_scale_linearTickRange(domain, m)[2] : d3_scale_linearNiceStep(domain)));
}
function d3_scale_linearNiceStep(domain) {
var extent = d3_scaleExtent(domain), span = extent[1] - extent[0]; return Math.pow(10, Math.round(Math.log(span) / Math.LN10) - 1);
}
function d3_scale_linearTickRange(domain, m) {
var extent = d3_scaleExtent(domain), span = extent[1] - extent[0], step = Math.pow(10, Math.floor(Math.log(span / m) / Math.LN10)), err = m / span * step; // Filter ticks to get closer to the desired count. if (err <= .15) step *= 10; else if (err <= .35) step *= 5; else if (err <= .75) step *= 2; // Round start and stop values to step interval. extent[0] = Math.ceil(extent[0] / step) * step; extent[1] = Math.floor(extent[1] / step) * step + step * .5; // inclusive extent[2] = step; return extent;
}
function d3_scale_linearTicks(domain, m) {
return d3.range.apply(d3, d3_scale_linearTickRange(domain, m));
}
function d3_scale_linearTickFormat(domain, m, format) {
var precision = -Math.floor(Math.log(d3_scale_linearTickRange(domain, m)[2]) / Math.LN10 + .01); return d3.format(format ? format.replace(d3_format_re, function(a, b, c, d, e, f, g, h, i, j) { return [b, c, d, e, f, g, h, i || "." + (precision - (j === "%") * 2), j].join(""); }) : ",." + precision + "f");
}