Re: Bimodal Gamma Distribution

On Jul 2, 6:16 am, gundalav <gunda...@xxxxxxxxx> wrote:
Hi all,

Is it true that Gamma distributions "cannot" model
the bimodal distributions?

Is there any literature I can refer to that says
that Gamma distribution is "always" unimodal?

For example I have the following figures.

http://docs.google.com/View?docid=dcvdrfrh_1dk9r2rc7

It has two peaks in the density.

The red line is normal curve and green line is gamma curve.
Notice that red line can correctly fit the histogram that has two
peaks (i.e. red curve also has two peaks).

But the gamma curve there only has one curve.

I was wondering if I can fit the gamma function such that it also
yields two peaks.

Regards,
GV.

Try a mixture of two gammas.
.

Relevant Pages

  • Re: Vuescan - new features
    ... >>Typically in a curves window, you can just select a point on the ... >>curve, and move it up or down. ... >However, even in that case, basing this "blind" setting on a gamma 2.2 ... the input is based on XYZ and the display is based on the monitor profile ...
    (comp.periphs.scanners)
  • Re: Vuescan - new features
    ... you can set points directly in the curve but that's ... I don't use Vuescan, but judging by reports from other users author's ... >>>56 in the 2.2 gamma corrected image. ... >1) of course you display a gamma 1.0 image directly on a gamma 2.2 monitor: ...
    (comp.periphs.scanners)
  • Bimodal Gamma Distribution
    ... Is it true that Gamma distributions "cannot" model ... It has two peaks in the density. ... The red line is normal curve and green line is gamma curve. ...
    (sci.stat.math)
  • Re: Bimodal Gamma Distribution
    ... Is it true that Gamma distributions "cannot" model ... It has two peaks in the density. ... The red line is normal curve and green line is gamma curve. ...
    (sci.stat.math)
  • Re: Gamma transfer function - my second try
    ... > Light intensity vs. signal input/output results in a curve. ... Also CCD and CMOS raw data are ... The gamma function is the property of cathode ray tubes. ... luminances that we see in the scene. ...
    (comp.graphics.apps.photoshop)
Quantcast