search for: nadeemshafique

Respected All, I need some efficient program or package to draw all possible samples of size two without replacement. I am using "combinat" package to list all possible samples but it hangs my computer for larger populations say 10,000 (i.e. 49995000 all possible samples). I wish to even work for larger populations then this and replicate this procedure for many times. Kindly can anyone

Respected All, I hope you are enjoying good health, I am tring to write a program in R but could not be very sucessful. My program draws random sample form bivariate normal distribution and then compute a variable PIJ. For certian samples some entries of variable PIJ is apearing as negative, which result in negative variance estimator. I want to introduce a loop in my program that verify the each

Respected All, I am writing a program in R and facing some problem with applying "if statment". Program first draw random numbers from bivariate normal distribution then compute variable say Pi and Pij from that sample and then further computation ..... ..... ..... In some samples Pij is appearing with negitive sign and ultimately resulted in an negative variance estimator.