数值比例尺

• d3.scale.linear - construct a linear quantitative scale.
• linear - get the range value corresponding to a given domain value.
• linear.invert - get the domain value corresponding to a given range value.
• linear.domain - get or set the scale's input domain.
• linear.range - get or set the scale's output range.
• linear.rangeRound - set the scale's output range, and enable rounding.
• linear.interpolate - get or set the scale's output interpolator.
• linear.clamp - enable or disable clamping of the output range.
• linear.nice - extend the scale domain to nice round numbers.
• linear.ticks - get representative values from the input domain.
• linear.tickFormat - get a formatter for displaying tick values.
• linear.copy - create a new scale from an existing scale.
• d3.scale.sqrt - construct a quantitative scale with a square root transform.
• d3.scale.pow - construct a quantitative scale with an exponential transform.
• pow - get the range value corresponding to a given domain value.
• pow.invert - get the domain value corresponding to a given range value.
• pow.domain - get or set the scale's input domain.
• pow.range - get or set the scale's output range.
• pow.rangeRound - set the scale's output range, and enable rounding.
• pow.interpolate - get or set the scale's output interpolator.
• pow.clamp - enable or disable clamping of the output range.
• pow.nice - extend the scale domain to nice round numbers.
• pow.ticks - get representative values from the input domain.
• pow.tickFormat - get a formatter for displaying tick values.
• pow.exponent - get or set the exponent power.
• pow.copy - create a new scale from an existing scale.
• d3.scale.log - construct a quantitative scale with an logarithmic transform.
• log - get the range value corresponding to a given domain value.
• log.invert - get the domain value corresponding to a given range value.
• log.domain - get or set the scale's input domain.
• log.range - get or set the scale's output range.
• log.rangeRound - set the scale's output range, and enable rounding.
• log.interpolate - get or set the scale's output interpolator.
• log.clamp - enable or disable clamping of the output range.
• log.nice - extend the scale domain to nice powers of ten.
• log.ticks - get representative values from the input domain.
• log.tickFormat - get a formatter for displaying tick values.
• log.copy - create a new scale from an existing scale.
• d3.scale.quantize - construct a linear quantitative scale with a discrete output range.
• quantize - get the range value corresponding to a given domain value.
• quantize.invertExtent - get the domain values for the specified range value.
• quantize.domain - get or set the scale's input domain.
• quantize.range - get or set the scale's output range (as discrete values).
• quantize.copy - create a new scale from an existing scale.
• d3.scale.threshold - construct a threshold scale with a discrete output range.
• threshold - get the range value corresponding to a given domain value.
• threshold.invertExtent - get the domain values for the specified range value.
• threshold.domain - get or set the scale's input domain.
• threshold.range - get or set the scale's output range (as discrete values).
• threshold.copy - create a new scale from an existing scale.
• d3.scale.quantile - construct a quantitative scale mapping to quantiles.
• quantile - get the range value corresponding to a given domain value.
• quantile.invertExtent - get the domain values for the specified range value.
• quantile.domain - get or set the scale's input domain (as discrete values).
• quantile.range - get or set the scale's output range (as discrete values).
• quantile.quantiles - get the scale's quantile bin thresholds.
• quantile.copy - create a new scale from an existing scale.
• d3.scale.identity - construct a linear identity scale.
• identity - the identity function.
• identity.invert - equivalent to identity; the identity function.
• identity.domain - get or set the scale's domain and range.
• identity.range - equivalent to identity.domain.
• identity.ticks - get representative values from the domain.
• identity.tickFormat - get a formatter for displaying tick values.
• identity.copy - create a new scale from an existing scale.