R help - Oct 2006 - Problem with rbinom

Hello!

I have the following problem: I calculate a variable called pd in Excel, 
save it as pd.txt, so that it looks like the following:

pd
0.070568471
0.011275136
0.006892258
0.028592432
0.028489582
0.01881913
0.035426606
0.011517305

There were 4857 cases in pd.txt.

After that I start R and load the data through the following command:
daten <- read.table("pd.txt", header=T)

Then I want to execute the function rbinom:

rbinom(4857,1,daten)

I get the following error message:
Fehler in rbinom(n, size, prob) : ung?ltige Argumente
(error in rbinom(n, size, prob) : bad arguments

The problem is daten, because if I excecute rbinom(4857,1,0.5), then it 
works.

So, I have no idea, what the problem could be.

Alex

-- 
Alexander Geisler * Moserhofgasse 36/1 * A-8010 Graz
StV Technische Mathematik | FakV TMTP
email: alexande at sbox.tugraz.at | ageisler at htu.tugraz.at
phone: +43 650 / 811 61 90

Using read.table creates a data frame that you store in dataen, rbinom wants a
vector not a data frame, so try:
> rbinom(4857,1,dataen$pd) 
Or 
> rbinom(4857,1,dataen[[1]])
Hope this helps, 


-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
 

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at
stat.math.ethz.ch] On Behalf Of Alexander Geisler
Sent: Monday, October 02, 2006 4:01 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Problem with rbinom

Hello!

I have the following problem: I calculate a variable called pd in Excel, save it
as pd.txt, so that it looks like the following:

pd
0.070568471
0.011275136
0.006892258
0.028592432
0.028489582
0.01881913
0.035426606
0.011517305

There were 4857 cases in pd.txt.

After that I start R and load the data through the following command:
daten <- read.table("pd.txt", header=T)

Then I want to execute the function rbinom:

rbinom(4857,1,daten)

I get the following error message:
Fehler in rbinom(n, size, prob) : ung?ltige Argumente (error in rbinom(n, size,
prob) : bad arguments

The problem is daten, because if I excecute rbinom(4857,1,0.5), then it works.

So, I have no idea, what the problem could be.

Alex

--
Alexander Geisler * Moserhofgasse 36/1 * A-8010 Graz StV Technische Mathematik |
FakV TMTP
email: alexande at sbox.tugraz.at | ageisler at htu.tugraz.at
phone: +43 650 / 811 61 90

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