Giter VIP home page Giter VIP logo

peakdet's Introduction

Peakdet is a NodeJS library for detecting peaks and valleys in data. Peakdet takes a JavaScript implementation of a MATLAB script for detecting peaks and packages it as a Node library and adds a test.

Usage

The library is in the peakdet.js file and an example of its use is:

var peakdet = require('./peakdet.js');

// Create the vector that we want to detect peaks in
v = []
for (var i = 0; i < 10; i += 0.001) {
  v.push(0.3 * Math.sin(i) + Math.sin(1.3 * i) + 0.9 * Math.sin(4.2 * i))
}

// Call the peakdet function, the second argument is the minimum differece
// between the peak and its surrounding points
res = peakdet.peakdet(v, 0.5)

peaks = res.peaks
valleys = res.valleys

for (var i=0; i < peaks.length; i++) {
  console.log("Peak " + peak[i])
}

for (var i=0; i < peaks.length; i++) {
  console.log("Valley " + valley[i])
}

Tests

To run the suite of tests:

  1. Install NodeJS.
  2. Run nodejs test.js
  3. If everything's working it should say something like Passed tests.

The test.ods file is a spreadsheet containing the test data.

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    ๐Ÿ–– Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. ๐Ÿ“Š๐Ÿ“ˆ๐ŸŽ‰

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google โค๏ธ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.