centralImputation: Fill in NA values with central statistics

In DMwR: Functions and data for "Data Mining with R"

Description

This function fills in any NA value in all columns of a data frame with the statistic of centrality (given by the function centralvalue()) of the respective column.

Usage

centralImputation(data)

Arguments

data	The data frame

Value

A new data frame with no NA values

Author(s)

Luis Torgo [e-mail]

References

Torgo, L. (2010) Data Mining using R: learning with case studies, CRC Press (ISBN: 9781439810187).

http://www.dcc.fc.up.pt/~ltorgo/DataMiningWithR

See Also

knnImputation, centralValue, complete.cases, na.omit

Examples

data(algae)
cleanAlgae <- centralImputation(algae)
summary(cleanAlgae)

Example output

Loading required package: lattice
Loading required package: grid
    season       size       speed         mxPH            mnO2       
 autumn:40   large :45   high  :84   Min.   :5.600   Min.   : 1.500  
 spring:53   medium:84   low   :33   1st Qu.:7.700   1st Qu.: 7.775  
 summer:45   small :71   medium:83   Median :8.060   Median : 9.800  
 winter:62                           Mean   :8.012   Mean   : 9.125  
                                     3rd Qu.:8.400   3rd Qu.:10.800  
                                     Max.   :9.700   Max.   :13.400  
       Cl               NO3              NH4                oPO4       
 Min.   :  0.222   Min.   : 0.050   Min.   :    5.00   Min.   :  1.00  
 1st Qu.: 11.066   1st Qu.: 1.312   1st Qu.:   38.78   1st Qu.: 15.90  
 Median : 32.730   Median : 2.675   Median :  103.17   Median : 40.15  
 Mean   : 43.091   Mean   : 3.276   Mean   :  497.31   Mean   : 73.26  
 3rd Qu.: 56.975   3rd Qu.: 4.421   3rd Qu.:  225.65   3rd Qu.: 98.00  
 Max.   :391.500   Max.   :45.650   Max.   :24064.00   Max.   :564.60  
      PO4              Chla               a1              a2        
 Min.   :  1.00   Min.   :  0.200   Min.   : 0.00   Min.   : 0.000  
 1st Qu.: 42.79   1st Qu.:  2.138   1st Qu.: 1.50   1st Qu.: 0.000  
 Median :103.29   Median :  5.475   Median : 6.95   Median : 3.000  
 Mean   :137.54   Mean   : 13.461   Mean   :16.92   Mean   : 7.458  
 3rd Qu.:213.25   3rd Qu.: 17.200   3rd Qu.:24.80   3rd Qu.:11.375  
 Max.   :771.60   Max.   :110.456   Max.   :89.80   Max.   :72.600  
       a3               a4               a5               a6        
 Min.   : 0.000   Min.   : 0.000   Min.   : 0.000   Min.   : 0.000  
 1st Qu.: 0.000   1st Qu.: 0.000   1st Qu.: 0.000   1st Qu.: 0.000  
 Median : 1.550   Median : 0.000   Median : 1.900   Median : 0.000  
 Mean   : 4.309   Mean   : 1.992   Mean   : 5.064   Mean   : 5.964  
 3rd Qu.: 4.925   3rd Qu.: 2.400   3rd Qu.: 7.500   3rd Qu.: 6.925  
 Max.   :42.800   Max.   :44.600   Max.   :44.400   Max.   :77.600  
       a7        
 Min.   : 0.000  
 1st Qu.: 0.000  
 Median : 1.000  
 Mean   : 2.495  
 3rd Qu.: 2.400  
 Max.   :31.600  

DMwR documentation built on May 1, 2019, 9:17 p.m.