Infer source schema

Given data source and headers infer will return a Table Schema based on the data values.

infer(source, options = list())

Arguments

source	data source, one of: string with the local CSV file (path) string with the remote CSV file (url) list of lists representing the rows readable stream with CSV file contents function returning readable stream with CSV file contents
options	any Table.load options

Value

Schema descriptor

Examples

# list of lists data source
source = list(
             list("id"= 1,
                  "age"= 39,
                  "name"= "Paul"),
             list("id"= 2,
                  "age"= 23,
                  "name"= "Jimmy"),
             list("id"= 3,
                  "age"= 36,
                  "name"= "Jane"),
             list("id"= 4,
                  "age"= 28,
                  "name"= "Judy"))

infer(source, options=list(headers=list("id","age","name")))$fields
#> [[1]]
#> [[1]]$name
#> [1] "id"
#> 
#> [[1]]$type
#> [1] "integer"
#> 
#> [[1]]$format
#> [1] "default"
#> 
#> 
#> [[2]]
#> [[2]]$name
#> [1] "age"
#> 
#> [[2]]$type
#> [1] "integer"
#> 
#> [[2]]$format
#> [1] "default"
#> 
#> 
#> [[3]]
#> [[3]]$name
#> [1] "name"
#> 
#> [[3]]$type
#> [1] "string"
#> 
#> [[3]]$format
#> [1] "default"
#> 
#>