vector-utils

A series of miscellaneous tools for vectorized JS operations.

Installing

npm install --save vector-utils

Docs

• Generate: npm install; npm run docs; open docs/index.html

Function manifest

• accumulateSeries - Turns an array of numeric series into a cumulative sum of arrays, increasing from the first series value to the last, normalized by a maximum value.
• average - Computes the weighted or unweighted average of a vector.
• clamp - Limits a value above or below a given constant.
• compareIntervals - Checks if endpoints of pairwise intervals exceed other pairwise intervals.
• cumulativeSum - A function for computing a cumulative sum of numbers in an array.
• crossFilt - A function for filtering other vectors based on a test of one.
• countUnique - Counts the numbers of unique items in an array.
• downsampleVec - Downsamples a vector (along first dimension) by a fixed factor.
• downsampleRational - Downsamples a vector (along first dimension) by a rational number.
• epochVec - Slices a vector into a matrix of vectors of equal or specified length(s).
• indexSort - Sorts a vector into an arbitrary order specified by indices.
• firstDifference - Computes the first difference of a vector.
• linVec - Produces a vector of linear points (equally spaced) from a lower limit to an upper limit.
• max - Computes the maximum value of a 1D matrix.
• max2D - Computes the maximum value of a 2D matrix.
• min - Computes the minimum value of a 1D matrix.
• min2D - Computes the minimum value of a 2D matrix.
• objToArray - Converts an object to an array of its values.
• sampleVector - Samples elements of a vector (with replacement).
• scalarProd - Computes the scalar product of two vectors.
• sequenceUpTo - Simple integer sequences.
• transpose2D - Transposes an array of arrays so that "columns" become "rows".
• vectorAccess - Vector key access for objects.
• vectorSum - A function that computes the vector sum of two vectors.
• vectorMag - Computes the magnitude of a vector.
• vectorProd - Computes the vector product of two vectors.
• zeros - Produces a vector of zeros.