Dear R- users and Helpers

Is there some way to re initialise or clear the array elements?  Pardon me for being vague but the problem itself quite vague. I have attached the code along with email. 
When I run the saved r- code using source("random1.txt") , command.

The program runs fine..but at times there is an error see below # ;  but again after the error if re-excuted it would work fine…I  probably missed some array detail in my program any suggestions

#Error in var(parrX[1, ]) : missing observations in cov/cor

parrX[] is an array .

 2) Also pardon me for the lengthy procedural code
        but as you could see in it..i have used the for loop for finding the positions (indexes) of the missing values and later carry out updating the new array element values at those particular positions/
         So how can I escape the for loop in this case ?  i.e get the missing position indexes and save another object ay vector or array ?

        And also later wanted to use matrix or vector multiplication (%*%)  for the updating statement
                        newy[i]<- u2 + covXY/varX * (sample$x[i] - u1)

         is any of the apply function good out here ?

  I really feel that I am doing something very routine and donkey work and I am most certain that powerful R – functions could just execute the same 10 liner for loop condition to mere 4 lines ? but how…I am getting lost in the sea of functions here…

Thank u for reading
Regards
Kunal
