Skip to content

Latest commit

 

History

History
239 lines (145 loc) · 8.15 KB

README.md

File metadata and controls

239 lines (145 loc) · 8.15 KB
Raw
About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

FiveThirtyEight Food Frequency Questionnaire

NPM version Build Status Coverage Status

FiveThirtyEight reader responses to a food frequency questionnaire (FFQ).

Usage

import dataset from 'https://cdn.jsdelivr.net/gh/stdlib-js/datasets-fivethirtyeight-ffq@esm/index.mjs';

dataset()

Returns FiveThirtyEight reader responses to a food frequency questionnaire (FFQ).

var data = dataset();
// returns [ {...}, ... ]

Notes

  • The administered food frequency questionnaire (FFQ) was the proprietary Block FFQ.

Examples

<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">

import bifurcateBy from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-bifurcate-by@esm/index.mjs';
import inmap from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-inmap@esm/index.mjs';
import ttest2 from 'https://cdn.jsdelivr.net/gh/stdlib-js/stats-ttest2@esm/index.mjs';
import dataset from 'https://cdn.jsdelivr.net/gh/stdlib-js/datasets-fivethirtyeight-ffq@esm/index.mjs';

function predicate( v ) {
    return ( v.diabetes === 1 );
}

function createAccessor( field ) {
    return accessor;

    function accessor( v ) {
        return v[ field ];
    }
}

// Retrieve the data:
var data = dataset();

// Split the data into two groups based on whether a respondent has diabetes:
var groups = bifurcateBy( data, predicate );

// For each group, extract the frequency of green salad consumption:
var mapFcn = createAccessor( 'greensaladfreq' );
var g1 = inmap( groups[ 0 ].slice(), mapFcn );
var g2 = inmap( groups[ 1 ].slice(), mapFcn );

// Perform a two-sample two-sided Student's t-test to determine if green salad consumption is different between the two groups:
var results = ttest2( g1, g2 );
console.log( results.print() );

</script>
</body>
</html>

References

License

The data files (databases) are licensed under an Open Data Commons Attribution 1.0 License and their contents are licensed under a Creative Commons Attribution 4.0 International Public License. The original dataset is attributed to FiveThirtyEight and can be found here. The software is licensed under Apache License, Version 2.0.

Notice

This package is part of stdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

Chat

Copyright

Copyright © 2016-2024. The Stdlib Authors.