[Rd] lm.{w}fit(x,y,*) : fails when x has no column names (PR#582)

[maechler@stat.math.ethz.ch]

(and bug.report() with vanilla setting is *REALLY* horrible inside ESS ... !)

> X <- matrix(rnorm(10),5,2)
> y <- rnorm(5)
> w <- rnorm(5)^2

> lm.fit (x=X, y=y) ##-> error
Error in names<-.default(*tmp*, value = c("", "", "")) : 
	names attribute must be the same length as the vector

> lm.wfit(x=X, y=y, w=w) ##-> error
Error in names<-.default(*tmp*, value = c("", "", "")) : 
	names attribute must be the same length as the vector
> 

--

Now, since  help(lm.fit) and help(lm.wfit) really do not contain any
information on these, one could argue that the above is not a bug.

However as build blocks for programming (many regressions),
these functions *should* work reasonably generally.

(I'm trying to fix this bug myself).

Martin

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