r - How to find the amount of positive numbers -


i new in world of r, , have rather easy questions, troubles me.

i have load of numbers: 

abc=rnorm(100, mean=0, sd=1)

i want find out how many of these numbers positive. tried:

length(which(abc>0)

but didn't work. suggestions?

what want is: 

sum(abc > 0)

try abc > 0 first. give boolean vector true abc values positive, length of both abc , boolean vector identical. since true equal 1 , false equal 0, sum of elements of vector give desired count. common trick in r, why felt answer in case.

another useful trick doing same mean, e.g. mean(abc > 0) give proportion of values in abc positive.

your original approach work (provided correct bracketing), taste which() not function intended such use.


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