[R] How to make the "apply" faster

[Debasish Pai Mazumder]

I have 4-dimension array x(lat,lon,time,var)

I am using "apply" to calculate over time
 new = apply(x,c(1,2,4),FUN=function(y) {length(which(y>=70))})

This is very slow. Is there anyway make it faster?

-Debasish

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