Displaying 2 results from an estimated 2 matches for "xprob".
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1999 Nov 22
1
variance?,...
hi
I'm learning R and making some examples.
One of them is that for given distribution
I show density function, distribution function
expected value and variance(?).
I know
EX <- function(xval,xprob) sum( (xval*xprob) );
where xval is vector of values and xprob vector of probabalities,
but
DX <- function(xval,xprob) EX((xval^2),xprob) - (EX(xval,xprob))^2;
doesn't work as I thought.
I've looked intto FAQs and archives but my question
is probably too simple.
Can somebody tell me wha...
2009 Mar 21
2
limiting simulated animal movement
Hi,
I am trying to simulate animal movement in a gridded landscape made up of
cells. At each time step (iteration), the animal moves from one cell to
another in a random fashion.
This is how I am simulating movement, where a and b are the x,y co-ordinates
of the animal at the previous time step:
for (i in 1:no.of.steps){
direction <- sample(1:8, 1)
if(direction == 1){
a <- a
b <- b -