Calculate Total Area — aw_total • areal
Description: aw_total produces a new total area field that contains the total area by source id. This is the second step in the interpolation process after aw_intersect.

# Calculate Total Area

Source: `R/aw_total.R`
`aw_total.Rd`

`aw_total` produces a new total area field that contains the total area by `source` id. This is the second step in the interpolation process after aw_intersect.

    aw_total(.data, source, id, areaVar, totalVar, type, weight)

## Arguments

.data | A `sf` object that has been intersected using aw_intersect
source | A `sf` object with data to be interpolated
id | A unique identification number
areaVar | The name of the variable measuring a feature's area, which is created as part of aw_intersect
totalVar | The name of a new total area field to be calculated
type | One of `"intensive"` or `"extensive"`
weight | One of `"sum"` or `"total"`

## Value

A `sf` object with the intersected data and new total area field.

## Examples

    library(dplyr)

    race <- select(ar_stl_race, GEOID, TOTAL_E)
    wards <- select(ar_stl_wards, WARD)

    wards %>%
        aw_intersect(source = race, areaVar = "area") -> intersect

    aw_total(intersect, source = race, id = GEOID, areaVar = "area",
             totalVar = "totalArea", weight = "sum", type = "extensive")#> Simple feature collection with 287 features and 5 fields
    #> geometry type:  GEOMETRY
    #> dimension:      XY
    #> bbox:           xmin: 733361.8 ymin: 4268411 xmax: 746155.7 ymax: 4295504
    #> projected CRS:  NAD83 / UTM zone 15N
    #> First 10 features:
    #>          GEOID TOTAL_E WARD         area  totalArea
    #> 1  29510106500    2863    1 4.271176e+05  1064776.2
    #> 2  29510106700    3168    1 5.946820e+05  1239241.5
    #> 3  29510107500    1991    1 6.146361e+05   912325.0
    #> 4  29510107600    1958    1 1.071347e+06  1146634.4
    #> 5  29510110100    2820    1 5.563665e+01   994606.5
    #> 6  29510109600    3050    1 3.586828e+03  3157835.4
    #> 7  29510126900    4462    1 8.903340e+05  4334701.5
    #> 8  29510127000    1826    1 1.015451e+03 14726832.5
    #> 9  29510106400    1986    1 6.866924e+05  1107191.4
    #> 10 29510108100    3309    1 1.198667e+02  3216478.2
    #>                          geometry
    #> 1  POLYGON ((738110.9 4283989,...
    #> 2  POLYGON ((738335.2 4283055,...
    #> 3  POLYGON ((740111.6 4286547,...
    #> 4  POLYGON ((739386.1 4285082,...
    #> 5  POLYGON ((739542.5 4283728,...
    #> 6  POLYGON ((740899.6 4285240,...
    #> 7  POLYGON ((739115.9 4285807,...
    #> 8  MULTIPOLYGON (((740936.1 42...
    #> 9  POLYGON ((738500.9 4284750,...
    #> 10 POLYGON ((740163.9 4286467,...