Displaying 1 result from an estimated 1 matches for "cmp_fun".
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cmp_func
2006 May 08
2
On the speed of apply and alternatives?
...,
I have to handle a large matrix (1000 x 10001) where in the
last column i have a value that all the preceding values in the same row
has to be compared to.
I have made the following code :
# generate a (1000 x 10001) matrix, testm
# generate statistics matrix 1000 x 4:
qnt <- c(0.01, 0.05)
cmp_fun <- function(x)
{
LAST <- length(x)
smpls <- x[1:(LAST-1)]
real <- x[LAST]
ret <- vector(length=length(qnt)*2)
for (i in 1:length(qnt))
{
q_i <- quantile(smpls, qnt[i]) # the quantile i
m_i <- mean(smpls[smpls<q_i ] ) # mean of obs less...