# colRMS(a)

Array statistics - determines the RMS (root mean square) value of each column in an array

### Syntax

o_colRMS(a)
  a: array 2D numeric - input 2D array
  return: array 2D - statistics of each column

### Usage

When analyzing plentiful data, such as with a number of tests on many DUTs it can be desirable to examine the statistics of various parameters. A typical way to represent the data is in an array, with each row representing a test vector, each column a particular tested parameter. This function analyzes the Maximum value of each column- hence each parameter.

### Location

menu: veeos ==> Math ==> Arrays ===> colRMS

library: mathLib

### Example

               4 4 5 3
    o_colRMS([ 3 5 4 5 ]   returns  [3.37 5.07 4.69 5.72]
               3 6 5 8

### Notes

Uses no loops so is fast.

### Reference

### Dependencies

### Supported On

VEE 7.0+, all platforms

### See Also

colMax, colMean, colMedian, colMin, colMode, colSDev, colVari

© 2015-2021. All Rights Reserved. Stan Bischof (stan@worldbadminton.com). Last updated 09 August 2021 18:18.