On 6/19/15 5:34 AM, narjes saraie wrote: > Hi Gilles. > > I do it and Thank you for your patient guidance.
Look at the link I posted to the sources used to generate the user guide. You can see plots in the user guide itself. Those plots were generated with freely available OSS tools. Phil > > cheers > > > On Fri, Jun 19, 2015 at 2:51 AM, Gilles <[email protected]> > wrote: > >> Hello. >> >> On Fri, 19 Jun 2015 01:46:25 -0700, narjes saraie wrote: >> >>> Hi Gilles, >>> >>> >>> I run this example in Netbeans and struct t distribution >>> >>> TDistribution t = new TDistribution(29); >>> double lowerTail = t.cumulativeProbability(-2.656); // P(T(29) <= >>> -2.656) >>> double upperTail = 1.0 - t.cumulativeProbability(2.75);// P(T(29) >= 2.75) >>> double m = t.density(3); >>> out.println( m ); >>> >>> >>> I want to see how I can plot this distribution or >>> t.cumulativeProbability(X>x)? >>> >> As Phil already told you, there is no plotting utility within Commons Math. >> Commons Math is "only" a library of mathematical algorithms. >> >> In your above case, you could write the values to an ASCII file (and then >> use a plotting tool to display them). >> In java, this would be a code similar to the following ("import" and >> exception >> handling omitted): >> >> ---CUT--- >> String filename = "distribution.dat"; >> BufferedOutputStream out = new BufferedOutputStream(new >> FileOutputStream(filename)); >> >> TDistribution t = new TDistribution(29); >> >> final double min = -10; >> final double max = 15; >> final double delta = 0.01; >> for (double x = min; x < max; x += delta) { >> final double upperTail = 1 - t.cumulativeProbability(x); >> out.println(x + " " + upperTail); >> } >> >> out.close(); >> ---CUT--- >> >> One plotting tool is "gnuplot": >> http://gnuplot.sourceforge.net/demo/ >> >> >> HTH, >> Gilles >> >> >> >>> thanks . >>> >>> On Thu, Jun 18, 2015 at 7:38 AM, Gilles <[email protected]> >>> wrote: >>> >>> Hi. >>>> >>>> On Thu, 18 Jun 2015 06:31:00 -0700, 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. >>>>> thanks. >>>>> >>>>> >>>> Perhaps it would be clearer to see what you mean with a code example. >>>> >>>> If you want to plot a distribution implemented in Commons Math, you'd >>>> call one the methods defined in the "RealDistribution" interface >>>> (e.g. "density(double x)"). >>>> >>>> But maybe that the functionality which you are looking for is defined >>>> in package "org.apache.commons.math3.stat.inference". >>>> >>>> If you need to fit data to a model (e.g. find the parameters of an >>>> assumed distribution), it is perhaps the least-squares fitting which >>>> you are looking for. For a univariate function, there is a utility >>>> implemented as "org.apache.commons.math3.fitting.SimpleCurveFitter". >>>> >>>> >>>> HTH, >>>> Gilles >>>> >>>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
