interactive maths: gamma distribution help needed

[Willy Tanner]

Hi all

For a presentation I would like to include a gamma distribution. It would be so much better if it were an interactive one, two sliders for the shape parameter alpha  and the rate parameter beta and below or above a plot that would visualise the density distribution that results from these two values. 

See https://en.wikipedia.org/wiki/Gamma_distribution , it is the probability density function that I am after (upper right).

It can probably be done using http://evanbalster.com/tiddlywiki/formulas.html and in particular the Harmonic Lattice demo comes close to what I have in mind. 

Can someone help me out here or point me towards helpful resources? 

Many thanks!

Willy

PS: I am aware of (but did not want to hijack) the other recent math-related tiddlywinks thread https://groups.google.com/forum/#!topic/tiddlywiki/4MlVWlrxl6A

[Willy Tanner]

Forgot to include the link to this http://evanbalster.com/tiddlywiki/formulas.html#Harmonic%20Lattice

[Ste Wilson]

Not sure...

https://gt6796c.github.io/

Could be useful coupled with range sliders?

<$range tiddler="$:/Range" min="1" max="10" default="1" increment="1"/>
<$set name="depth" value={{$:/Range}}>