37 lines
856 B
Markdown
37 lines
856 B
Markdown
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# Bessel.JS
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Pure-JS implementation of the Bessel functions (J,Y,I,K), for node and browser
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The standard notation is used here:
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- J is the Bessel function of the first kind
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- Y is the Bessel function of the second kind
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- I is the modified Bessel function of the first kind
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- K is the modified Bessel function of the first kind
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# Usage
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The functions `besselj`, `bessely`, `besseli`, `besselk` are exposed when you include
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the script `bessel.js`:
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```html>
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<script src="bessel.js"></script>
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<script>console.log(besselj(1,2));</script>
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```
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See `test.html` for an example
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In node, those four functions are exported:
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```js>
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var besselj01 = require('bessel').besselj(0,1);
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```
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Each function follows Excel semantics `(value, function-order)`. For example,
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```js>
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bessel.besselj(1.5, 1)
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```
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is the value of the bessel function J1 at the point x=1.5
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