R: extract classes from classInterval object

findCols {classInt} | R Documentation

## extract classes from classInterval object

### Description

This helper function is a wrapper for `findInterval` to extract classes from a "classInterval" object

### Usage

    findCols(clI, factor = FALSE)

### Arguments

`clI` | a "classIntervals" object
`factor` | default "FALSE", if "TRUE" returns cols as a factor with intervals as labels

### Value

an integer vector of class indices

### Author(s)

Roger Bivand <Roger.Bivand@nhh.no>

### See Also

`classIntervals`, `findInterval`

### Examples

    xvar <- c(22361, 9573, 4836, 5309, 10384, 4359, 11016, 4414, 3327, 3408,
      17816, 6909, 6936, 7990, 3758, 3569, 21965, 3605, 2181, 1892,
      2459, 2934, 6399, 8578, 8537, 4840, 12132, 3734, 4372, 9073,
      7508, 5203)
    findCols(classIntervals(xvar, 5, "sd"), factor = FALSE)
    findCols(classIntervals(xvar, 5, "sd"), factor = TRUE)
    if (!require("spData", quietly=TRUE)) {
      message("spData package needed for examples")
      run <- FALSE
    } else {
      run <- TRUE
    }
    if (run) {
    data(jenks71, package="spData")
    fix5 <- classIntervals(jenks71$jenks71, n=5, style="fixed",
     fixedBreaks=c(15.57, 25, 50, 75, 100, 155.30))
    print(fix5)
    }
    if (run) {
    print(findCols(fix5))
    print(findCols(fix5, factor = TRUE))
    }

[Package classInt version 0.4-7 Index]