d3.variance(array[, accessor]) Returns an

d3.zip(arrays…) Returns an array of arrays, where the ith array contains the ith element from each of the

d3.tickStep(start, stop, count) Returns the difference between adjacent tick values if the same arguments were

d3.ascending(a, b) Returns -1 if a is less than b, or 1 if a is greater than b, or

d3.thresholdSturges(values) Returns the number of bins according to

bisector.right(array, x[, lo[, hi]]) Equivalent to

histogram.value([value]) If value is specified, sets the value accessor to the specified function or constant

d3.transpose(matrix) Uses the zip operator as

d3.median(array[, accessor]) Returns the median of the given array of numbers using the

d3.deviation(array[, accessor]) Returns the standard deviation, defined as the square root of the