masked from package:base?

On 12/1/05, Arne Henningsen <ahenningsen at email.uni-kiel.de> wrote:

On Friday 02 December 2005 02:50, August Berg wrote:

I am confused by the following description in

http://www.maths.lth.se/help/R/.R/library/systemfit/html/hausman.systemfi
t .

html

what does the "Not run" mean?

This means that the command "library( systemfit )" is not executed when
the
package is checked by "R CMD check".

@Jeff: I think we should remove "library( systemfit )" from the example
section, because everybody should know this.

if we do not load systemfit, how can we run
the following code?

## Not run: library( systemfit )

data( kmenta )
attach( kmenta )
...

I install the package of systemfit, and run the code.

I got the warning:

library( systemfit )
data( kmenta )
attach( kmenta )

        The following object(s) are masked from package:base :

         q

The data set "kmenta" has a (column) name called "q"
R> names(kmenta)
[1] "q" "p" "d" "f" "a"

If you attach these data to the search path, there are two objects with
the
name "q": the quantity from Kmenta's data set and the function to quit R.
Hence, attaching this data set masks the function "q" (quit) from the
package
called "base". However, you don't have to worry, because "q()" and "?q"
still
work as expected.

@Jeff: Since using "attach" is often troublesome, I suggest that we
remove "attach( kmenta )" from the example section and use "systemfit(
..., data =
kmenta )" instead.

Best wishes,
Arne

Thanks. But still report such an error:

pval <- 1 - pchisq( h, dim( fit3sls$bcov )[1] )

Error in pchisq(q, df, lower.tail, log.p) :
        Non-numeric argument to mathematical function