Hi Richard,
I have not considered the 4 digit zip codes, I have taken only 5 digits. I
have attached two folders, in the 'air' folder I have some specific zip
codes and in output I got proper results, whereas in the 'par' folder I got
'NA's in the minimum distance column. Actually, the problem was to find the
nearest store for a specific brand.
Thanks,
*Debasmita*
On Wed, Aug 5, 2020 at 7:08 AM Richard M. Heiberger <r...@temple.edu> wrote:
> verify that you actually have five-digit zip codes stored as
> characters. New Jersey and Massachusetts have zero as
> the first digit. When these codes are saved as numbers, they become
> four-digit codes and will probably cause errors.
> For example Cambridge, Mass is '02138', and would be reported as 2138
> when interpreted as a number..
>
> On Tue, Aug 4, 2020 at 9:29 PM Debasmita Sur <ds071...@gmail.com> wrote:
> >
> > Dear R-experts,
> > I have two lists of US zip codes and want to pick the nearest zip code
> from
> > second list against my first list.e.g.30043 (from second list) is closest
> > to the zip code 30094 (from first list).So,it should come against
> 30094.The
> > code should compare the distance from each zip and pick the nearest one.
> > I have written the following code. It is giving proper results for many,
> > but in mindist, it is showing 'NAs'. But for some of the zip codes, it is
> > giving proper minimum distance. Please note it will be effective for 5
> > digit zip codes. Any help will be highly appreciated.
> >
> > df1<-read.csv("C:/Users/dxsur/Desktop/ZIP1.csv")
> > df2<-read.csv("C:/Users/dxsur/Desktop/ZIP2.csv")
> >
> > results<-merge(x=df1,y=zipcode,all.x=TRUE)
> > results1<-merge(x=df2,y=zipcode,all.x=TRUE)
> >
> distance<-distm(subset(results,select=c(longitude,latitude)),subset(results1,select=c(longitude,latitude)))
> >
> > rnum=apply(distance, 1, which.min)
> > mindist=apply(distance, 1, min)
> >
> > final<-cbind(results,results1$zip[unlist(rnum)],mindist)
> >
> >
> > Thanks & Regards,
> > *Debasmita *
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
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> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
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