Recode

Description

Recodes a set of variables according to a set of rules

Usage

recode.variables(data,recodes)

Arguments

Details

recodes contains a set of recoding rules separated by ";". There are three different types of recoding rules:

1. The simplest codes one value to another. If we wish to recode 1 into 2, we could use the rule "1->2;".

2. A range of values can be coded to a single value using "1:3->4;". This rule would code all values between 1 and 3 inclusive into 4. For factors, a value is between two levels if it is between them in the factor ordering. One sided ranges can be specified using the Lo and Hi key words (e.g."Lo:3->0; 4:Hi->1")

3. Default conditions can be coded using "else." For example, if we wish to recode all values >=0 to 1 and all values <0 to missing, we could use ("0:Hi->1; else->NA")

Value

returns a recoded data.frame

Author(s)

Ian Fellows adapted from code by John Fox

See Also

cut recode in package 'car'

Examples

data<-data.frame(a=rnorm(100),b=rnorm(100),male=rnorm(100)>0)
recode.variables(data[c("a","b")] , "Lo:0 -> 0;0:Hi -> 1;")
data[c("male")] <- recode.variables(data[c("male")] , "1 -> 'Male';0 -> 'Female';else -> NA;")

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> library(Deducer)
Loading required package: ggplot2
Loading required package: JGR
Loading required package: rJava
Loading required package: JavaGD
Loading required package: iplots

Please type JGR() to launch console. Platform specific launchers (.exe and .app) can also be obtained at http://www.rforge.net/JGR/files/.


Loading required package: car
Loading required package: MASS


Note Non-JGR console detected:
	Deducer is best used from within JGR (http://jgr.markushelbig.org/).
	To Bring up GUI dialogs, type deducer().

> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/Deducer/recode.variables.Rd_%03d_medium.png", width=480, height=480)
> ### Name: recode.variables
> ### Title: Recode
> ### Aliases: recode.variables
> 
> ### ** Examples
> 
> data<-data.frame(a=rnorm(100),b=rnorm(100),male=rnorm(100)>0)
> recode.variables(data[c("a","b")] , "Lo:0 -> 0;0:Hi -> 1;")
    recode.other.variable. recode.other.variable..1
1                        0                        1
2                        0                        1
3                        0                        0
4                        1                        0
5                        1                        0
6                        1                        1
7                        1                        1
8                        0                        1
9                        1                        1
10                       1                        1
11                       1                        1
12                       1                        0
13                       0                        0
14                       1                        0
15                       1                        1
16                       0                        0
17                       1                        0
18                       1                        1
19                       0                        0
20                       0                        1
21                       0                        1
22                       1                        1
23                       0                        1
24                       0                        0
25                       0                        0
26                       0                        1
27                       1                        1
28                       1                        0
29                       1                        1
30                       1                        0
31                       1                        0
32                       1                        1
33                       1                        1
34                       0                        0
35                       0                        1
36                       0                        0
37                       0                        1
38                       0                        0
39                       1                        1
40                       0                        0
41                       0                        1
42                       0                        0
43                       0                        1
44                       0                        1
45                       1                        0
46                       1                        1
47                       1                        0
48                       1                        1
49                       0                        0
50                       0                        1
51                       1                        0
52                       0                        1
53                       0                        1
54                       1                        1
55                       1                        1
56                       1                        0
57                       1                        0
58                       0                        0
59                       1                        1
60                       1                        0
61                       0                        1
62                       1                        1
63                       0                        0
64                       0                        0
65                       0                        1
66                       1                        1
67                       0                        0
68                       0                        1
69                       1                        0
70                       1                        1
71                       0                        1
72                       1                        0
73                       1                        0
74                       0                        1
75                       0                        0
76                       1                        0
77                       0                        0
78                       1                        1
79                       1                        0
80                       1                        1
81                       0                        0
82                       1                        0
83                       0                        0
84                       1                        0
85                       1                        0
86                       1                        0
87                       1                        0
88                       1                        1
89                       1                        1
90                       0                        0
91                       0                        0
92                       1                        1
93                       1                        1
94                       0                        0
95                       0                        1
96                       0                        1
97                       0                        1
98                       1                        0
99                       0                        0
100                      0                        1
> data[c("male")] <- recode.variables(data[c("male")] , "1 -> 'Male';0 -> 'Female';else -> NA;")
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>