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From Phil Steitz <phil.ste...@gmail.com>
Subject Re: [math]plot distribution
Date Fri, 19 Jun 2015 14:24:02 GMT
On 6/19/15 2:22 AM, narjes saraie wrote:
> Hi Phil.
>
>
> I open http://s.apache.org/HTo  <http://s.apache.org/HTo>
> but i couldent use it.Is it possible for you to attache one  source of the
> plot?

Click on "RealDistributionComparison.java" and you will see the
source code.

Phil
> I dont know witch line help me to draw the plots in the user
> guide section on probability distributions?
> Im sorry that Im  very very beginner.
>
>
> thanks a lot .
>
>
> <http://s.apache.org/HTo>
>
> On Thu, Jun 18, 2015 at 8:06 AM, Phil Steitz <phil.steitz@gmail.com> wrote:
>
>> On 6/18/15 6:31 AM, narjes saraie wrote:
>>> Hi All.
>>> I am beginner in java and have some data.I want to guess a distribution
>> for
>>> my data then calculate goodness of fit (gof).
>>> I find distribution commons math and use it ,if i want plot my
>> distribution
>>> or CDF or probability (X>x), how do it?
>>> is it any example for distribution and plotting it.
>> We don't have graphical exploratory data analysis tools in Commons
>> Math.  You would do best to start with a package that supports
>> generation of histograms if you have no idea what distribution might
>> fit the data.  If you do have an idea of what the distribution is,
>> depending on what it is, you may be able to estimate the parameters
>> of the distribution from the data.  For example, if you think that
>> the data are normally distributed, you can use SummaryStatistics in
>> the stat package to get the standard statistical estimators of the
>> mean and standard deviation, which together determine a normal
>> distribution. Then you could do a Kolmogorov-Smirnov test (or group
>> the data and use a G- or ChiSquare test) to assess goodness of fit.
>> Other distributions have different parameters and different
>> statistical estimators.
>>
>> We don't currently support plotting distributions in Commons Math,
>> but the user guide code contains an example showing how to do it
>> with some external tools.  Have a look at the plots in the user
>> guide section on probability distributions [1] and the source for
>> the code that generates those plots [2].
>>
>> Phil
>>
>> [1]
>> http://commons.apache.org/proper/commons-math/userguide/distribution.html
>> [2] http://s.apache.org/HTo
>>
>>> thanks.
>>>
>>
>>
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>>


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