[R] Creating a vector based on lookup function

Charles C. Berry cberry at tajo.ucsd.edu
Wed Nov 26 21:30:31 CET 2008

On Wed, 26 Nov 2008, PDXRugger wrote:

> I am still searching for a solution to what i think is a simple problem i am
> having with building a vector in a for loop.  I have built a more
> understandable example so hopefully that will help..help you, help me, if
> you know what i mean.
> dev=400
> #test location model TAZs to reference
> cands=c(101,105,109)
> #Create Object of length of cands
> candslength=length(cands)
> #TEST TAZ Vector
> CANDS=(100:110)
> #Test Dev Vector
> TAZDEVS=c(120,220,320,420,520,620,720,820,920,1020,1120)
> #Creates datframe of CANDS and DEVS
> for(i in 1:candslength){
> 	cand=cands[i]
> 	#Creates an object based on the value of "cands" in TAZLIST
> 	}
> What i would like to see is TAZDet filled with the "cands" corresponding
> values found in "TAZLIST"'s second column TAZDEVS, they would be
> 120,520,920.


 	101 is the second element of CANDS
 	220 is the second element of TAZDEVS

So, 120 is not 'corresponding' in any sense I know of. et cetera.

  So if things worked the way i would like them TAZDet would be
> a vector containing these three values (102,520,920).  At this point it
> gives me NAs.

Which happens because you have an obvious bug. What is


> Any help would be desirable, Thanks guys and gals.

Is this what you seek?




> Cheers,
> JR
> -- 
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901

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