Using earth.dist function

Hi Everyone,

I am a graduate student who will be using R to do my analysis.  I need to do
a spatial analysis, and the first step is to calculate the geographic
distance between my study sites.  I am hoping to use earth.dist because it
allows for multiple pairwise distances to be calculated at one time.  I have
done a sample calculation, and I seem to have a problem between the steps of
using create.lats and earth.dist.  I've copied the steps I've taken in R
since I am NOT computer literate and have a real problem debugging computer
programming.  Hopefully someone can help.

create.lats(weatherstations,loc="locality",long="longitude",lat="latitude")

                    longitude latitude
Adra                 -119.58    49.73
Bankier Chain Lake   -120.28    49.70
Chute Lake           -119.53    49.68
Douglas Lake         -120.20    50.16
Hedley               -120.08    49.36
Hedley NP Mine       -120.02    49.37

data(weatherstations.lats)

Warning message:
In data(weatherstations.lats) : data set ?weatherstations.lats? not found

earth.dist(weatherstations.lats)

Error in earth.dist(weatherstations.lats) :
   object 'weatherstations.lats' not found

earth.dist(weatherstations)

    1  2  3  4  5
2 NA
3 NA NA
4 NA NA NA
5 NA NA NA NA
6 NA NA NA NA NA
There were 50 or more warnings (use warnings() to see the first 50)
Thanks! Cloe

Hi Everyone,

I am a graduate student who will be using R to do my analysis. ?I need to do
a spatial analysis, and the first step is to calculate the geographic
distance between my study sites. ?I am hoping to use earth.dist because it
allows for multiple pairwise distances to be calculated at one time. ?I have
done a sample calculation, and I seem to have a problem between the steps of
using create.lats and earth.dist. ?I've copied the steps I've taken in R
since I am NOT computer literate and have a real problem debugging computer
programming. ?Hopefully someone can help.

create.lats(weatherstations,loc="locality",long="longitude",lat="latitude")

? ? ? ? ? ? ? ? ? longitude latitude
Adra ? ? ? ? ? ? ? ? -119.58 ? ?49.73
Bankier Chain Lake ? -120.28 ? ?49.70
Chute Lake ? ? ? ? ? -119.53 ? ?49.68
Douglas Lake ? ? ? ? -120.20 ? ?50.16
Hedley ? ? ? ? ? ? ? -120.08 ? ?49.36
Hedley NP Mine ? ? ? -120.02 ? ?49.37

data(weatherstations.lats)

Warning message:
In data(weatherstations.lats) : data set ?weatherstations.lats? not found

earth.dist(weatherstations.lats)

Error in earth.dist(weatherstations.lats) :
?object 'weatherstations.lats' not found

earth.dist(weatherstations)

? 1 ?2 ?3 ?4 ?5
2 NA
3 NA NA
4 NA NA NA
5 NA NA NA NA
6 NA NA NA NA NA
There were 50 or more warnings (use warnings() to see the first 50)

Thanks! Cloe

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