I want to do operation with ff vector from packages ff like simple operation
in R like this. (I have read data from file)
Example
a=1:10
b=a[a>5]
how to do this operation with ff packages:
Example :
a=ff(1, length=15*10^7)
I know that I could get logical vector like this:
k=bit(15*10^7) # from bit packages
a=ff(-1,15*10^7)
system.time(
for (i in chunk(a)){ k[i]<- a[i]<1}
)
Any suggestions?
Best,
Krystian
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