sample (sampl? available on npm...)

var sample = require('sample');
var a = new sample;


a = {
  v: null,// current/last value
  n: 0,   // count
  s: 0,   // sum
  sq: 0,  // sum squared
  sl: 0,  // sum log
  sql: 0, // sum log squared
  mn: 0,  // min
  mx: 0,  // max
  q: [],  // quantiles (defaults to quartiles: [], define eta)
}

sample(a,1)
sample(a,1)
sample(a,3)
sample(a,4)
sample(a,1,2,3,4,5,10)

var b = new sample(a) // clone!

Get the values using the available functions:

• sample.stdev(a[,!arithmetic,geometric])
• sample.mean(a[,!arithmetic,geometric,harmonic,quadric])
• sample.variance(a)
• sample.sum(a)
• sample.moe(a)
• sample.range(a) // = max-min
• sample.min(a)
• sample.max(a)
• sample.product(a)
• sample.count(a)

// approximations

• sample.quantile(a,q) // approximation
• sample.median(a) // = sample.quantile(.5)

// maybe just keep internal?

• sample.sumSq(a)
• sample.sumLog(a)
• sample.sumSqLog(a)

sample-time

var sample = require('sample')
  , time = require('sample-time');

var a = new sample();

time.start(a)
time.end(a)
time(a)

sets frames & time properties on the sample a

fps = Math.round( ( frames * 1000 ) / ( time - prevTime ) ) ms = time - startTime

sample-count

Increments a number on the sample

count(a) // a.i++ count(a) // a.i++ count(a) // a.i++ count(a) // a.i++ count.sample(a) // sample(a,a.i); a.i = 0;

Examples:

- count the number of times update() has been called during a frame
- count the number of extras has been added/removed during an update()
- count the collisions during an update()

sample-viz

+-----------------------+ |title Z| +-----------------------+ | x xxx | |xx xxxx xxxxx x | | xxx x xxx| | | | | +-----------------------+ |stdev: X mean: Y| +-----------------------+

• Click "stdev: X" or "mean: Y" to toggle between:

  • stdev
  • mean (arithmetic,geometric,harmonic,quadric)
  • median
  • variance
  • sum
  • range
  • min
  • max
  • product
  • count

• Click "title Z" to toggles between different samples.

• Draw colored background lines for the "secondary" values (stdev/mean in ascii)

API

var sample = require('sample'); var time = require('sample-time'); var viz = require('sample-viz');

var a = new sample; var b = new sample; var c = new sample;

var va = new viz(a,{name:'frame time',unit:'ms'}); document.body.appendChild(va.div);

requestAnimationFrame(function render(){ requestAnimationFrame(render); time.start(a) // = a.startTime = now(); while(Math.random() > .1){ sample(c,Math.random()*1000) } time.end(a) // = sample(a,now()-a.startTime) time(b) // = b.frames++; b.startTime = b.startTime || now(); if( now() > b.startTime+1000 ) { sample(b,b.frames/(now()-b.startTime)); b.frames = 0; b.startTime = now(); } va.render() })