testing and ploting t-distribution!!!!! Thank you so much:)
see inline.
On Fri, Dec 3, 2010 at 11:03 PM, <5qy at queensu.ca> wrote:
Hi everyone, i don't get the qqplot which is used to test if the sample followed a t-distribution? qqplot(qt(ppoints(z), df = 7.6), z, xlab = "Q-Q plot for t dsn") qqline(z) what qt() means? what ppoints() means?
You must learn to answer such questions yourself by typing ?qt ?ppoints
I know qqnorm() will plots the data in the way of normal distribution. how to make the qqplot to plot the data in the form of t-distribution? Or is there any command can actually test if the imput data is t-distribution? like the?shapiro.test(x) used to test the normality. Thank you so much, guys. Sincerely, Bill ----- Original Message ----- From: Michael Bedward <michael.bedward at gmail.com> Date: Friday, December 3, 2010 7:48 pm Subject: Re: [R] testing and ploting t-distribution To: 5qy at queensu.ca Cc: r-help at r-project.org
Hello Bill, Have a look at the example at the bottom of the help page for ?qqplot Michael On 4 December 2010 11:19,? <5qy at queensu.ca> wrote:
Hi there, I am doing a test to see the the residual is distributed in
the form of t-distribution and trying to plot the residuals and the t-distribution to compare in the graph.
Cheers, Bill ----- Original Message ----- From: r-help-request at r-project.org Date: Wednesday, December 1, 2010 1:29 am Subject: confirm 1f8ffd55c611e2b0ed4ed4d2b79a8d9b30182a95 To: 5qy at queensu.ca
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