[R] Choosing a column for analysis in a function
Hello all,
I'm having a problem concerning choosing columns from a dataset in a
function.
I'm writing a function for data input etc., which first reads the data,
and then does several data manipulation tasks.
The function can be then used, with just giving the path of the .txt
file where the data is being held.
These datasets consists of over 20 different analytes. Though,
statistical analyses should be made seperately analyte by analyte. So
the function needs to be able to choose a certain analyte based on what
the user of the function gives as a parameter when calling the function.
The name of the analyte user gives, is the same as a name of a column in
the data set.
The question is: how can I refer to the parameter which the user gives,
inside the function? I cannot give the name of the analyte directly
inside the function, as the same function should work for all the 20
analytes.
I'm giving some code for clarification:
datainput - function(data1,data2,data3,data4,data5,data6,analyte)
{
...
##data1-data6 being the paths of the six datasets I want to combine and
analyte being the special analyte I want to analyze and which can be
found on each of the datasets as a columnname.##
##Then:##
...
data.whole - subset(data.whole,
select=c(Sample.Name,Analyte.Values,Day,Plate))
##Is for choosing the columns needed for analysis. The Analyte should
now be the column of the analyte, the users is referring to when calling
the datainput-function. How to do it? ##
I've tried something like
data.whole$Analyte.Values - data.whole$analyte ##(Or in quotes
analyte)
But this does not work. I've tried several other tricks also, but
cannot get it to work. Can someone help?
Thanks in advance,
Jouni
__
R-help@stat.math.ethz.ch 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.
Re: [R] Choosing a column for analysis in a function
Perhaps the use of as.character() like following might help?
data.whole$Analyte.Values - data.whole$as.character(analyte)
Junnila, Jouni wrote:
Hello all,
I'm having a problem concerning choosing columns from a dataset in a
function.
I'm writing a function for data input etc., which first reads the data,
and then does several data manipulation tasks.
The function can be then used, with just giving the path of the .txt
file where the data is being held.
These datasets consists of over 20 different analytes. Though,
statistical analyses should be made seperately analyte by analyte. So
the function needs to be able to choose a certain analyte based on what
the user of the function gives as a parameter when calling the function.
The name of the analyte user gives, is the same as a name of a column in
the data set.
The question is: how can I refer to the parameter which the user gives,
inside the function? I cannot give the name of the analyte directly
inside the function, as the same function should work for all the 20
analytes.
I'm giving some code for clarification:
datainput - function(data1,data2,data3,data4,data5,data6,analyte)
{
...
##data1-data6 being the paths of the six datasets I want to combine and
analyte being the special analyte I want to analyze and which can be
found on each of the datasets as a columnname.##
##Then:##
...
data.whole - subset(data.whole,
select=c(Sample.Name,Analyte.Values,Day,Plate))
##Is for choosing the columns needed for analysis. The Analyte should
now be the column of the analyte, the users is referring to when calling
the datainput-function. How to do it? ##
I've tried something like
data.whole$Analyte.Values - data.whole$analyte ##(Or in quotes
analyte)
But this does not work. I've tried several other tricks also, but
cannot get it to work. Can someone help?
Thanks in advance,
Jouni
__
R-help@stat.math.ethz.ch 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.
__
R-help@stat.math.ethz.ch 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.
Re: [R] Choosing a column for analysis in a function
Thank you for the tip.
I already got a tip from Steve Ellison and it works for me. I'm now
using
data.whole$Analyte.Values - data.whole[[analyte]]
and everything goes smoothly!
I tested also your suggestion, but got the following
error: attempt to apply non-function
So I'm sticking with Steve's suggestion. Thanks anyway!!
-Jouni
-Original Message-
From: Adaikalavan Ramasamy [mailto:[EMAIL PROTECTED]
Sent: 31. toukokuuta 2007 16:57
To: Junnila, Jouni
Cc: r-help@stat.math.ethz.ch
Subject: Re: [R] Choosing a column for analysis in a function
Perhaps the use of as.character() like following might help?
data.whole$Analyte.Values - data.whole$as.character(analyte)
Junnila, Jouni wrote:
Hello all,
I'm having a problem concerning choosing columns from a dataset in a
function.
I'm writing a function for data input etc., which first reads the
data, and then does several data manipulation tasks.
The function can be then used, with just giving the path of the .txt
file where the data is being held.
These datasets consists of over 20 different analytes. Though,
statistical analyses should be made seperately analyte by analyte. So
the function needs to be able to choose a certain analyte based on
what the user of the function gives as a parameter when calling the
function.
The name of the analyte user gives, is the same as a name of a column
in the data set.
The question is: how can I refer to the parameter which the user
gives, inside the function? I cannot give the name of the analyte
directly inside the function, as the same function should work for all
the 20 analytes.
I'm giving some code for clarification:
datainput - function(data1,data2,data3,data4,data5,data6,analyte)
{
...
##data1-data6 being the paths of the six datasets I want to combine
and analyte being the special analyte I want to analyze and which can
be found on each of the datasets as a columnname.## ##Then:## ...
data.whole - subset(data.whole,
select=c(Sample.Name,Analyte.Values,Day,Plate))
##Is for choosing the columns needed for analysis. The Analyte
should now be the column of the analyte, the users is referring to
when calling the datainput-function. How to do it? ## I've tried
something like
data.whole$Analyte.Values - data.whole$analyte ##(Or in quotes
analyte)
But this does not work. I've tried several other tricks also, but
cannot get it to work. Can someone help?
Thanks in advance,
Jouni
__
R-help@stat.math.ethz.ch 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.
__
R-help@stat.math.ethz.ch 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.
