Displaying 2 results from an estimated 2 matches for "behabiour".
2010 Oct 28
1
Unexpected behabiour of min, tapply and POSIXct/POSIXlt classes?
Hello,
I found rather surprising the behaviour of POSIXct and POSIXlt classes
when combined with min and tapply.
The details can be deduced from the script below:
############# Start of the script ####################
before <- Sys.time()
Sys.sleep( 1 )
now1 <- now2 <- Sys.time()
my.times <- c( before, now1, now2 )
class( my.times ) ## [1] "POSIXct"
2000 Feb 14
2
Error in the inverse of a diagonal matrix?
I?m new to R so maybe this issue has been asked before and I still could not read the complete set of past messages sent to the list.
I found a weird behabiour that I will explain with a simple example. Lets consider the following block of commands:
> x <- diag(c(1,4,10))
> x
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 4 0
[3,] 0 0 10
> invx <- x^-1
> invx
[,1] [,2] [,3]
[1,] 1 Inf Inf
[2,] Inf 0.25 Inf...