R: removing the last elements of a vector

Question

How can I remove the last 100 elements of a zoo series?

I know the name[-element] notation but I can\'t get it work to substract a full section

Answer 1

Actually, there's a much faster way:

y <- x[1:(length(x)-1)]

Code show:

> microbenchmark( y <- head(x, -1), y <- x[-length(x)],y <- x[1:(length(x)-1)], times=10000)
 Unit: microseconds
                      expr    min      lq     mean  median      uq      max
          y <- head(x, -1) 71.399 76.4090 85.97572 78.9230 84.2775 2795.076
        y <- x[-length(x)] 53.623 55.5585 65.15008 56.5680 61.1585 2523.141
 y <- x[1:(length(x) - 1)] 25.722 28.2925 36.43029 29.1855 30.4010 2410.975