[R] questions about boxplots

2005-09-26 Thread Yulei He
Hi, there.

I have two questions about using R to create boxplots.

1. The function boxplot() plots the outliers. How can I label the exact 
values arount these outlier points? Does R have an option allow me to 
do that?

2. How can I put two boxplots in one x-y axis?

Thanks.

Yulei


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[R] probability-probability plot

2005-07-02 Thread Yulei He
Hi, there.

Is there any function in R to plot the probability-probability plot (PP 
plot)? Suppose I am testing some data against normal.

Thanks.

Yulei


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[R] plot smooth density estimates for bivariate data

2005-02-05 Thread Yulei He
Hi, there.

Suppose I have a bivarariate data matrix y1 and y2. I want to plot a 3-D
picture of the estimated density f(y1, y2) against y1 and y2? How can I do
that? Do I use persp() or density()?

Thanks for your help.

Yulei


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1586 Murfin Ave. Apt 37
Ann Arbor, MI 48105-3135
[EMAIL PROTECTED]
734-647-0305(H)
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[R] multivariate diagnostics

2005-01-12 Thread Yulei He
Hi, there.

I have two questions about the diagnostics in multivarite statistics.

1. Is there any diagnostics tool to check if a multivariate sample is from
multivariate normal distribution? If there is one, is there any function
doing it in R?

2. Is there any function of testing if two multivariate distribution are
same, i.e. the multivariate extension of Kolomogrov-Smirnov test?

Thanks for your help.

Yulei


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1586 Murfin Ave. Apt 37
Ann Arbor, MI 48105-3135
[EMAIL PROTECTED]
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[R] how to estimate conditional density

2004-11-16 Thread Yulei He
Hi, there.

Suppose I have a bivariate data set y1 and y2. Can anybody tell me how to
estimate the conditional density of f(y1|y2) and vice versa? Thanks.

Yulei


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[R] (no subject)

2004-10-30 Thread Yulei He
Hi, there.

Does anybody know how to plot a smooth density plot for some data
simulated from certain distribution? Thanks.

Yulei


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Yulei He
1586 Murfin Ave. Apt 37
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[R] how to read a series of data set

2004-08-20 Thread Yulei He
Hi, there.

I want to input and output a bunch of data set. Suppose I want to read
data set m1.dat, m2.dat, m3.dat,... m100.dat and output c1.dat, c2.dat, ..
and c100.dat. Notice that the index of data set is from 1 to 100, How can
I put them into a loop? The code I am thinking is
that

for (i in 1:100)
{
 test=read.table(file=?);
 write.table(test, file=?);
}

Any help will be greatly appreicated.

Yulei



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1586 Murfin Ave. Apt 37
Ann Arbor, MI 48105-3135
[EMAIL PROTECTED]
734-647-0305(H)
734-763-0421(O)
734-763-0427(O)
734-764-8263(fax)
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[R] inverse function for positive definite matrix

2003-10-31 Thread Yulei He
Hi, there.

Can anyone tell me inverse function for positive definite matrix in R? In
GAUSS, this function is called invpd and is known to be faster than the
normal inverse function.

Thanks!


Yulei

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1586 Murfin Ave. Apt 37
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[EMAIL PROTECTED]
734-647-0305(H)
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[R] how to set missing values in R

2003-10-27 Thread Yulei He
Hi, there.

Can I ask how to set up missing values in R? Suppose I want to assign the
missing value to the elements in vector which is greater than zero like
this:

x-c(1,3,-1,0,4);

after the missing value assignment, x becomes (NA,NA,-1,0,NA).

Thanks!

Yulei


$$$
Yulei He
1586 Murfin Ave. Apt 37
Ann Arbor, MI 48105-3135
[EMAIL PROTECTED]
734-647-0305(H)
734-763-0421(O)
734-763-0427(O)
734-764-8263(fax)
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