Changes to certain time steps of a variable

[John Murray]

To all GrADS users,

I am working with a dataset that has 100080 time steps for every hour from
April 1st 1996 through August 31st 2007.  Each hour has a count of the
high composite reflectivity frequency across the eastern U.S. I am also
reading in wind data at a few select points and am testing to see if it is
from a certain wind direction.  If it is from the desired wind direction,
I will either keep the count variable or make it equal to zero.

I have this procedure in a loop, but the problem is that I keep
overwriting the data and by the last time step, the modifications to the
count variable from testing the point of wind are not saved. If I try to
make another variable with the time dimension from 1 to 100080, I get a
segmentation fault. Is there anyway I can easily modify or update the
count variable after testing the winds at certain time steps?

Any help would be greatly appreciated.

John Murray
Stony Brook University Graduate Student