R help - Sep 2011 - plot(m, which = 1), where m is a lm linear model. What is 'which' doing?

Sample code from *R CookBook* (awesome book btw) *11.12: Finding the Best
Power Transformation (Box-Cox) Procedure*

require(MASS)
x <- 10:100
eps <- rnorm(length(x), sd = 5)
y <- (x + eps)^(-1 / 1.5)

m <- lm(y ~ x)

# ***************** What does the *which* in this line do???
********************************************
plot(m, which = 1)

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Remember R is object-oriented. Your m is lm object, so check

?plot.lm

Weidong Gu

On Thu, Sep 15, 2011 at 8:14 PM, Idris Raja <idris.raja at gmail.com>
wrote:
> Sample code from *R CookBook* (awesome book btw) *11.12: Finding the Best
> Power Transformation (Box-Cox) Procedure*
>
> require(MASS)
> x <- 10:100
> eps <- rnorm(length(x), sd = 5)
> y <- (x + eps)^(-1 / 1.5)
>
> m <- lm(y ~ x)
>
> # ***************** What does the *which* in this line do???
> ********************************************
> plot(m, which = 1)
>
> ? ? ? ?[[alternative HTML version deleted]]
>
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