[R] arrange data for simple regression analysis

[Petr Pikal]

Hi

not sure what do you want to do but what about

y<-colMeans(your.data)
x<-c(0,30,60,120)
fit<-lm(y~x)

Is this what you want?

Better to use advice suggested in posting guide and to show some 
reproducible example.

HTH
Petr


On 24 Apr 2006 at 5:15, Tomás Revilla wrote:

Date sent:      	Mon, 24 Apr 2006 05:15:58 -0400
From:           	"Tomás Revilla" <tomlists at gmail.com>
To:             	r-help at stat.math.ethz.ch
Subject:        	[R] arrange data for simple regression analysis

> Hello, I want to arrange data from a table to perform a simple
> regression. All the examples I saw deal with paired data, e.g. 'x' and
> 'y' have the same dimensions (e.g. 5 values for x and 5 for y).
> 
> But I have more than one 'y' for each 'x' value, e.g. the data file
> has a x = 0, 30, 60, and 120 columns. And for each of them I have
> several replicate responses (e.g. individuals), not allways the same
> number. After I read the data with read.table(), ending with 4
> columns, what is next? how can I regress this against c(0, 30, 60,
> 120)?
> 
> 0       -->   n1 y values
> 30     -->  n2 y values
> 60     --> n3 y values
> 120  --> n4 y values
> 
> Thanks,
> 
> Tomas
> 
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Petr Pikal
petr.pikal at precheza.cz