Re: [Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-04 Thread Wayne Watson
Hi, actually, more question was more informational than how to do it. I wrote a function to do it, but wondered why such a function didn't seem to exist. In my case, the histogram is from a small processor that produces frequency data from 307K points. Unraveling the frequency data and returning

Re: [Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-02 Thread Matthias Michler
Hi Wayne, you are right all these function use the sample-data and not the pdf / frequency of occurence-histogram, because typically the data is available and not the pdf. Maybe the scipy mailing list could give you a solution to your problem. In case that your freqency of occurence are

[Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-01 Thread Wayne Watson
Is there some statistics function that computes the mean, std. dev., min/max, etc. from a frequency distribution? -- Wayne Watson (Watson Adventures, Prop., Nevada City, CA) (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time) Obz Site: 39° 15' 7 N, 121°

Re: [Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-01 Thread John Hunter
On Tue, Dec 1, 2009 at 6:32 AM, Wayne Watson sierra_mtnv...@sbcglobal.net wrote: Is there some statistics function that computes the mean, std. dev., min/max, etc. from a frequency distribution? numpy has many functions for basic descriptive statistics. If data is an array of your data, you

Re: [Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-01 Thread Wayne Watson
I do not believe that any of those calculations are based on the pdf, frequency of occurrence-histogram. This, (1, 2,2, 4, 2,5,4) and not this (1,3, 0,2,1). The latter are the frequencies of occurrence for 1,2,3,4,5. John Hunter wrote: On Tue, Dec 1, 2009 at 6:32 AM, Wayne Watson