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Re: idl bimodal distribution [message #73562]

Fri, 19 November 2010 10:32

penteado
Messages: 866
Registered: February 2018

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On Nov 19, 4:24 pm, Paulo Penteado <pp.pente...@gmail.com> wrote:
> On Nov 19, 4:14 pm, Ana <u...@compgroups.net/> wrote:
>
>> I'm trying to simulate a bimodal "randomn" distribution with the 2 peaks having the sigmas of 0.3 each for example and mean around -1.2 and -0.7...
>> Do you have any tips?
>
>> I've tried adding these below, but it doesn't work..., I get a unimodal distribution...
>> met_1a = randomn(seed,100000)*0.3-1.2
>> met_1b = randomn(seed,100000)*0.3-0.7
>
>> Can someone help?
>
> Maybe I misunderstood it, but is this not a result of the central
> limit theorem?

If you want two peaks, it seems that you want the concatenation, not
the addition of the two distributions. Still, the distance between the
peaks will have to be large compared to the sum of their standard
deviations.

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[Message index]

		Re: idl bimodal distribution By: penteado on Fri, 19 November 2010 10:32
		Re: idl bimodal distribution By: penteado on Fri, 19 November 2010 10:24
		Re: idl bimodal distribution By: Robin Wilson on Fri, 19 November 2010 15:42

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