thr3ads.net - R help - [R] relating data in two data frames [Aug 2012]

If this information is useful, please help other people find it:
Share via:

Sapana Lohani

2012-Aug-20 00:56 UTC

[R] relating data in two data frames

Hi, 


My data.frame "A" has FID like this

FID

a

a
b
b
b
c
c
d
d
d
d

Now my second data.frame "B" has age value for a, b, c, d like

FID Age

a      5

b      7
c      9
d      3

How can search for the Age column in "B" and replace the values in
"A" so that my new "A" looks like this

FID Age

a      5
a      5
b      7
b      7
b      7
c      9
c      9
d      3
d      3
d      3
d      3

Thanks you

	[[alternative HTML version deleted]]

David Winsemius

2012-Aug-20 01:43 UTC

head link

[R] relating data in two data frames

On Aug 19, 2012, at 5:56 PM, Sapana Lohani wrote:
> Hi,
>
>
> My data.frame "A" has FID like this
>
> FID
>
> a
>
> a
> b
> b
> b
> c
> c
> d
> d
> d
> d
>
> Now my second data.frame "B" has age value for a, b, c, d like
>
> FID Age
>
> a      5
>
> b      7
> c      9
> d      3
>
> How can search for the Age column in "B" and replace the values
in
> "A" so that my new "A" looks like this
? merge

Perhaps

merge(A, B)
# although the ambiguities inherent in posting only screen output  
instead of the greatly-to-be-preferred output of dput() makes this a  
guess.
>
> FID Age
>
> a      5
> a      5
> b      7
> b      7
> b      7
> c      9
> c      9
> d      3
> d      3
> d      3
> d      3
>
> Thanks you
>
> 	[[alternative HTML version deleted]]
And posting html is a deprecated format for rhelp.>
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
(Console output does not qualify as reproducible.)


-- 

David Winsemius, MD
Alameda, CA, USA

arun

2012-Aug-20 12:43 UTC

head link

[R] relating data in two data frames

Hi,
Try this:
A<-data.frame(FID=c("a","a","b","b","c","c","d","d","d","d"))
B<-read.table(text="
FID Age
a????? 5
b????? 7
c????? 9
d????? 3 
",sep="",header=TRUE) 
library(plyr)
join(A,B,type="inner")
Joining by: FID
?? FID Age
1??? a?? 5
2??? a?? 5
3??? b?? 7
4??? b?? 7
5??? c?? 9
6??? c?? 9
7??? d?? 3
8??? d?? 3
9??? d?? 3
10?? d?? 3
A.K.



----- Original Message -----
From: Sapana Lohani <lohani.sapana at ymail.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc: 
Sent: Sunday, August 19, 2012 8:56 PM
Subject: [R] relating data in two data frames

Hi, 


My data.frame "A" has FID like this

FID

a

a
b
b
b
c
c
d
d
d
d

Now my second data.frame "B" has age value for a, b, c, d like

FID Age

a????? 5

b????? 7
c????? 9
d????? 3

How can search for the Age column in "B" and replace the values in
"A" so that my new "A" looks like this

FID Age

a????? 5
a????? 5
b????? 7
b????? 7
b????? 7
c????? 9
c????? 9
d????? 3
d????? 3
d????? 3
d????? 3

Thanks you

??? [[alternative HTML version deleted]]


______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Sapana Lohani

2012-Aug-21 05:54 UTC

head link

[R] irregular splits in dataframe

Hello everyone, 


My dataframe (Soil Type) looks something like this

Granitic Hills 16-20 PZ
Loamy Upland 16-20 PZ
Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
Loamy Upland 16-20 PZ

I want to separate them at "/", but when there is just one type, I
want "NA" in the second column, How can I do that ??

Thank you
	[[alternative HTML version deleted]]

jim holtman

2012-Aug-21 09:45 UTC

head link

[R] irregular splits in dataframe

try this:

> x <- scan(text = "Granitic Hills 16-20 PZ+ Loamy Upland 16-20 PZ
+ Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
+ Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
+ Loamy Upland 16-20 PZ", what = '', sep = '\n')
Read 5 items> x[1] "Granitic Hills 16-20 PZ"
[2] "Loamy Upland 16-20 PZ"
[3] "Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ"
[4] "Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ"
[5] "Loamy Upland 16-20 PZ"> y <- strsplit(x, '/')
> # now put NA is there is only one entry
> y <- lapply(y, function(.line){+     if (length(.line) == 1) .line <- c(.line, NA)  # add NA
+     .line
+ })> do.call(rbind, y)     [,1]                          [,2]
[1,] "Granitic Hills 16-20 PZ"     NA
[2,] "Loamy Upland 16-20 PZ"       NA
[3,] "Sandy Loam Upland 12-16 PZ " " Sandy Loam, Deep 12-16
PZ"
[4,] "Loamy Upland 12-16 PZ "      " Sandy Loam Upland 12-16
PZ"
[5,] "Loamy Upland 16-20 PZ"       NA>

On Tue, Aug 21, 2012 at 1:54 AM, Sapana Lohani <lohani.sapana at
ymail.com> wrote:> Hello everyone,
>
>
> My dataframe (Soil Type) looks something like this
>
> Granitic Hills 16-20 PZ
> Loamy Upland 16-20 PZ
> Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
> Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
> Loamy Upland 16-20 PZ
>
> I want to separate them at "/", but when there is just one type,
I want "NA" in the second column, How can I do that ??
>
> Thank you
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.


-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

Noia Raindrops

2012-Aug-21 10:16 UTC

head link

[R] irregular splits in dataframe

How about this?

read.table(text = "Granitic Hills 16-20 PZ
Loamy Upland 16-20 PZ
Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
Loamy Upland 16-20 PZ", header = FALSE, sep = "/", fill = TRUE,
na.strings = "", strip.white = TRUE)
##                           V1                         V2
## 1    Granitic Hills 16-20 PZ                       <NA>
## 2      Loamy Upland 16-20 PZ                       <NA>
## 3 Sandy Loam Upland 12-16 PZ  Sandy Loam, Deep 12-16 PZ
## 4      Loamy Upland 12-16 PZ Sandy Loam Upland 12-16 PZ
## 5      Loamy Upland 16-20 PZ                       <NA>

-- 
Noia Raindrops
noia.raindrops at gmail.com

arun

2012-Aug-21 10:45 UTC

head link

[R] irregular splits in dataframe

Hi,
Try this:
dat1 <- readLines(textConnection("Granitic Hills 16-20 PZ
?Loamy Upland 16-20 PZ
?Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
?Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
?Loamy Upland 16-20 PZ"))?

dat3<-strsplit(dat1,"/")
?data.frame(col1=do.call(rbind,lapply(dat3,`[`,1)),col2=do.call(rbind,lapply(dat3,`[`,2)))
# ? ? ? ? ? ? ? ? ? ? ? ? ?col1??????????????????????? col2
#1????? Granitic Hills 16-20 PZ??????????????????????? <NA>
#2??????? Loamy Upland 16-20 PZ??????????????????????? <NA>
#3? Sandy Loam Upland 12-16 PZ??? Sandy Loam, Deep 12-16 PZ
#4?????? Loamy Upland 12-16 PZ?? Sandy Loam Upland 12-16 PZ
#5??????? Loamy Upland 16-20 PZ??????????????????????? <NA>?

A.K.

----- Original Message -----
From: Sapana Lohani <lohani.sapana at ymail.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc: 
Sent: Tuesday, August 21, 2012 1:54 AM
Subject: [R] irregular splits in dataframe

Hello everyone, 


My dataframe (Soil Type) looks something like this

Granitic Hills 16-20 PZ
Loamy Upland 16-20 PZ
Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
Loamy Upland 16-20 PZ

I want to separate them at "/", but when there is just one type, I
want "NA" in the second column, How can I do that ??

Thank you
??? [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

arun

2012-Aug-21 13:00 UTC

head link

[R] irregular splits in dataframe

Hi,


Slight modification to my earlier code to make it more simple.
dat1 <- readLines(textConnection("Granitic Hills 16-20 PZ
?Loamy Upland 16-20 PZ
?Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
?Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
?Loamy Upland 16-20 PZ")) 

dat3<-strsplit(dat1,"/")

data.frame(do.call(rbind,lapply(dat3,`[`,c(1,2))))
#??????????????????????????? X1????????????????????????? X2
#1????? Granitic Hills 16-20 PZ??????????????????????? <NA>
#2??????? Loamy Upland 16-20 PZ??????????????????????? <NA>
#3? Sandy Loam Upland 12-16 PZ??? Sandy Loam, Deep 12-16 PZ
#4?????? Loamy Upland 12-16 PZ?? Sandy Loam Upland 12-16 PZ
#5??????? Loamy Upland 16-20 PZ??????????????????????? <NA>
A.K.

----- Original Message -----
From: Sapana Lohani <lohani.sapana at ymail.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc: 
Sent: Tuesday, August 21, 2012 1:54 AM
Subject: [R] irregular splits in dataframe

Hello everyone, 


My dataframe (Soil Type) looks something like this

Granitic Hills 16-20 PZ
Loamy Upland 16-20 PZ
Sandy Loam Upland 12-16 PZ / Sandy Loam, Deep 12-16 PZ
Loamy Upland 12-16 PZ / Sandy Loam Upland 12-16 PZ
Loamy Upland 16-20 PZ

I want to separate them at "/", but when there is just one type, I
want "NA" in the second column, How can I do that ??

Thank you
??? [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Seemingly Similar Threads

Search for more reasonably related threads

R help - Aug 2012 - relating data in two data frames

[R] relating data in two data frames

[R] relating data in two data frames

[R] relating data in two data frames

[R] irregular splits in dataframe

[R] irregular splits in dataframe

[R] irregular splits in dataframe

[R] irregular splits in dataframe

[R] irregular splits in dataframe

Seemingly Similar Threads