问题描述
我有一个数据集,其中包含每个房产地址的纬度和经度。此外,我还创建了两个新列(icelat、icelog),其中包含犹他州一座特定建筑物的纬度和经度。
数据如下:
RowID PropertyAddressLatitude PropertyAddressLongitude icelat icelog
1: 000D655E-1AEA-E811-80C3-3863BB430E3F 38.65195 -109.4085 40.2351 -111.6384
2: 000F655E-1AEA-E811-80C3-3863BB430E3F 38.50952 -109.4763 40.2351 -111.6384
3: 0012CB31-D004-E911-80C7-3863BB43E813 NA NA 40.2351 -111.6384
4: 0013655E-1AEA-E811-80C3-3863BB430E3F 38.54184 -109.5031 40.2351 -111.6384
5: 0014655E-1AEA-E811-80C3-3863BB430E3F NA NA 40.2351 -111.6384
6: 0015655E-1AEA-E811-80C3-3863BB430E3F NA NA 40.2351 -111.6384
我想创建一个名为“距离”的新列,表示从每个房产的经纬度到犹他州特定建筑物的距离(以英里为单位)。
我尝试了几种不同的使用 Geosphere 包的方法,但无法让它运行所有“PropertyAddressLatitude”和“PropertyAddressLongitude”观测值,并自动对“icelat”和“icelog”进行数学运算。>
解决方法
默认单位将以米为单位,因此我将就地转换。
meter2mile <- 0.000621371
dat[,distance := meter2mile * geosphere::distVincentyEllipsoid(
cbind(PropertyAddressLongitude,PropertyAddressLatitude),cbind(icelog,icelat)) ]
dat
# RowID PropertyAddressLatitude PropertyAddressLongitude icelat icelog distance
# 1: 000D655E-1AEA-E811-80C3-3863BB430E3F 38.65195 -109.4085 40.2351 -111.6384 161.7148
# 2: 000F655E-1AEA-E811-80C3-3863BB430E3F 38.50952 -109.4763 40.2351 -111.6384 166.0397
# 3: 0012CB31-D004-E911-80C7-3863BB43E813 NA NA 40.2351 -111.6384 NA
# 4: 0013655E-1AEA-E811-80C3-3863BB430E3F 38.54184 -109.5031 40.2351 -111.6384 163.4240
# 5: 0014655E-1AEA-E811-80C3-3863BB430E3F NA NA 40.2351 -111.6384 NA
# 6: 0015655E-1AEA-E811-80C3-3863BB430E3F NA NA 40.2351 -111.6384 NA
数据
dat <- as.data.table(structure(list(RowID = c("000D655E-1AEA-E811-80C3-3863BB430E3F","000F655E-1AEA-E811-80C3-3863BB430E3F","0012CB31-D004-E911-80C7-3863BB43E813","0013655E-1AEA-E811-80C3-3863BB430E3F","0014655E-1AEA-E811-80C3-3863BB430E3F","0015655E-1AEA-E811-80C3-3863BB430E3F"),PropertyAddressLatitude = c(38.65195,38.50952,NA,38.54184,NA),PropertyAddressLongitude = c(-109.4085,-109.4763,-109.5031,icelat = c(40.2351,40.2351,40.2351),icelog = c(-111.6384,-111.6384,-111.6384)),row.names = c(NA,-6L),class = c("data.table","data.frame")))
(我从您的示例数据中推断出 data.table
,如果这不正确,请告知。)