Computes the upper interquartile mean (upper midmean) of a numeric array.
$ npm install compute-umidmean
For use in the browser, use browserify.
To use the module,
var umidmean = ;
umidmean( arr[, sorted] )
Computes the upper midmean of a numeric
array. This is computed by discarding all values below the median and calculating the mean of those values falling between the first and third quartiles.
Note: the input array must contain 6 or more elements.
var unsorted = 5 6 7 2 1 8 4 3 ;var mean = ;// returns 6.5
If the input
array is already
sorted in ascending order, set the optional second argument to
var sorted = 1 2 3 4 5 6 7 8 ;var mean = ;// returns 6.5
var data = 100 ;for var i = 0; i < datalength; i++data i = Math;console;
To run the example code from the top-level application directory,
$ node ./examples/index.js
If provided an unsorted input
array, the function is
O( N log(N) + m ), where
N is the input
array length and
m is the number of values located between the first and third quartiles of the upper range. If the input
array is already sorted in ascending order, the function is
The upper midmean includes the values located between but not including the first and third quartiles of the upper range. In the following examples, the values included in the upper midmean are in bold.
[1,2,3,4,5,6,7,8] —> umidmean: 6.5
[1,2,3,4,5,6,7,8,9,10,11,12] —> umidmean: 9.5
$ make test
All new feature development should have corresponding unit tests to validate correct functionality.
This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:
$ make test-cov
Istanbul creates a
./reports/coverage directory. To access an HTML version of the report,
$ make view-cov
Copyright © 2014. Rebekah Smith.