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Introducing Enhanced Alert Actions and Triage Functionality
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jstat
Advanced tools
Readme
jStat provides native javascript implementations of statistical functions. Full details are available in the docs. jStat provides more functions than most libraries, including the weibull, cauchy, poisson, hypergeometric, and beta distributions. For most distributions, jStat provides the pdf, cdf, inverse, mean, mode, variance, and a sample function, allowing for more complex calculations.
jStat can be used in the browser. The jStat
object will be added to the window. For example:
<script src="components/jstat.js"></script> <!-- include jStat, from the CDN or otherwise -->
<script>
...
var jstat = this.jStat(dataset); // jStat will be added to the window
...
data[i]['cum'] = jstat.normal(jstat.mean(), jstat.stdev()).cdf(data[i].x);
...
</script>
The library is hosted on jsDelivr using the following url:
//cdn.jsdelivr.net/npm/jstat@latest/dist/jstat.min.js
Note that 'latest'
can be replaced with any released verion of jStat.
Currently jStat is exposed as j$
and jStat
inside an object, rather than
exported directly. This may confuse some module loaders, however should be
easily remedied with the correct configuration.
To install via npm:
npm install --save jStat
When loading under Node be sure to reference the child object.
var jStat = require('jStat').jStat;
For RequireJS not only exports
but also init
function must be specified.
requirejs.config({
paths: {
'jstat': 'path/to/jstat/dist/jstat.min'
},
shim: {
jstat: {
exports: ['j$', 'jStat'],
init: function () {
return {
j$: j$,
jStat: jStat
};
}
}
}
});
In order to build jStat, you need to have GNU make 3.8 or later, Node.js 0.2 or later, and git 1.7 or later. (Earlier versions might work OK, but are not tested.)
Windows users have two options:
Mac OS users should install Xcode (comes on your Mac OS install DVD, or downloadable from
Apple's Xcode site) and
http://mxcl.github.com/homebrew/. Once Homebrew is installed, run brew install git
to install git,
and brew install node
to install Node.js.
Linux/BSD users should use their appropriate package managers to install make, git, and node, or build from source if you swing that way.
First, clone a copy of the jStat git repo by running git clone git://github.com/jstat/jstat.git
.
To download all necessary libraries run npm install
.
Then, to get a complete, minified version of jStat and all documentation, simply cd
to the jstat
directory and
type make
. If you don't have Node installed and/or want to make a basic, uncompressed, unlinted version of jstat,
use make jstat
instead of make
.
The built version of jStat will be put in the dist/
subdirectory.
Generate just the documentation by running make doc
. Documentation will be placed in dist/docs
by default.
To remove all built files, run make clean
.
Execute all tests by running make test
.
Or if you wish to run a specific test, cd
to test/<subdir>
and run node <some_test>-test.js
.
Both the minified and unminified source are located in the dist/
directory. For those who don't want to build
it themselves.
jStat is now going to follow most of the v8 JavaScript guidelines. There will be plenty of source that uses the old style, but we're going to work away from that.
Also, we'll be going through and reimplementing a good portion of the code to run faster. Hopefully it won't take too long to get the project on one basic standard.
When submitting pull requests, no need to check in dist/*.js. They'll be recompiled for distribution anyway.
We always like discussion of how to improve jStat. Join us at our mailing list and let us know what you'd like to see. Also come ask questions in the #jstat channel on irc.freenode.net.
FAQs
Statistical Library for JavaScript
The npm package jstat receives a total of 237,564 weekly downloads. As such, jstat popularity was classified as popular.
We found that jstat demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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