quantile

Returns the quantile in a data vector for a cumulative probability.

Takes a data vector and a probability and returns the quantile cut point for the probability. The vector must be sorted and the probability in the range [0.0, 1.0]. The interpolation methods available are the same as in R and available in a number of statistical packages. See the R documentation or wikipedia for details (https://en.wikipedia.org/wiki/Quantile).

double

quantile

(

ProbType

Range

)

(

const ProbType prob

Range data

QuantileInterpolation method = QuantileInterpolation.R7

)

if (

isRandomAccessRange!Range &&

hasLength!Range

isNumeric!(ElementType!Range)

isFloatingPoint!ProbType

)

Examples

double data = [22, 57, 73, 97, 113];
double median = quantile(0.5, data);   // 73
auto q1 = [0.25, 0.5, 0.75].map!(p => p.quantile(data));  // 57, 73, 97
auto q2 = [0.25, 0.5, 0.75].map!(p => p.quantile(data), QuantileInterpolation.R8);  //45.3333, 73, 102.333

quantile

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