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Merging vectors

2 messages · Mago84, William Dunlap

Mago84
# 
Dear R addicts,

I?m trying to merge two vectors like these and I don?t want to use loops.

EV
 [1]   9  16  19  21  67  71  82  87 110 112 141 156 201 211 248 264 272 298
331
[20] 341 347 361 373 468 490 493 504 508 806 830 833 883 885 897 953 955

SV
 [1]   3  21  28  33 229 379 396 532 535 541 630 634 643 645 647 654 656 677
680
[20] 685 687 718 727 735 738 746 748 751 766 768 903 926 936 995 999

I need to obtain something like this:
9, 21, 21, 28, 67, 229, 248, 379..

Taking one by one of each vector in order. * EV is always the first one*.

I have never use the function merge, I tried to look for a piece of
information, but I?m not sure that it?s what I should use.

Could somebody help me?

Thanks a lot!

--
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William Dunlap
# 
Does the following do what you want?  You didn't
describe the rule and the example output was truncated:

EV <- c(
   9,16,19,21,67,71,82,87,110,112,141,156,201,211,248,264,272,298,331,
   341,347,361,373,468,490,493,504,508,806,830,833,883,885,897,953,955)

SV <- c(
   3,21,28,33,229,379,396,532,535,541,630,634,643,645,647,654,656,677,680,
   685,687,718,727,735,738,746,748,751,766,768,903,926,936,995,999)

f1 <- function(EV, SV) {
   names(EV) <- rep("EV", length(EV))
   SV <- SV[SV >= min(EV)]
   names(SV) <- rep("SV", length(SV))
   z <- sort(c(SV, EV))
   nms <- names(z)
   unname(z[c(TRUE, nms[-1] != nms[-length(z)])])
}

f1(EV,SV)
# gives [1]   9  21  21  28  67 229 248 379 468 532 806 903 953 995
# wanted 9, 21, 21, 28, 67, 229, 248, 379..

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com