Hi all
This is basically just a maths problem. I'm looking to fill an array with a Gaussian curve and be able to control the sigma value (and any other relevant variables), but my math skills aren't good enough! I tried this, based off of the standard function listed on Wikipedia:
expr $f2 * pow (2.71828, -(($f1-$f3)^2/(2*$f4^2)))
but there must be a mistake because I'm not getting the right curve.
Can anyone help?
(NB: The point is to find a replacement for the [gauss] external, using the nice new [array random] function).
Liam
Hi Liam,
On 17/04/16 07:52, Liam Goodacre wrote:
Hi all
This is basically just a maths problem. I'm looking to fill an array with a Gaussian curve and be able to control the sigma value (and any other relevant variables), but my math skills aren't good enough! I tried this, based off of the standard function listed on Wikipedia:
expr $f2 * pow (2.71828, -(($f1-$f3)^2/(2*$f4^2)))
I think in expr, ^ means bitwise xor instead of power. I'd rewrite it as:
expr $f2*exp(-($f1-$f3)*($f1-$f3)/(2*$f4*$f4))
but there must be a mistake because I'm not getting the right curve.
Can anyone help?
(NB: The point is to find a replacement for the [gauss] external, using the nice new [array random] function).
Liam
Claude
Working now, thanks Claude!
To: pd-list@lists.iem.at From: claude@mathr.co.uk Date: Sun, 17 Apr 2016 12:10:04 +0100 Subject: Re: [PD] Generate a Gaussian curve
Hi Liam,
On 17/04/16 07:52, Liam Goodacre wrote:
Hi all
This is basically just a maths problem. I'm looking to fill an array with a Gaussian curve and be able to control the sigma value (and any other relevant variables), but my math skills aren't good enough! I tried this, based off of the standard function listed on Wikipedia:
expr $f2 * pow (2.71828, -(($f1-$f3)^2/(2*$f4^2)))
I think in expr, ^ means bitwise xor instead of power. I'd rewrite it as:
expr $f2*exp(-($f1-$f3)*($f1-$f3)/(2*$f4*$f4))
but there must be a mistake because I'm not getting the right curve.
Can anyone help?
(NB: The point is to find a replacement for the [gauss] external, using the nice new [array random] function).
Liam
Claude
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Claude Heiland-Allen -
Liam Goodacre