[R] Help batch saving elements of a list into unique files

Tue Mar 22 23:57:45 CET 2016

This is what I ran:

> drop_token1<-function(x) {
+   return(paste(x[2:length(x)],sep="."))
+ }
> for(affdf in 1:length(out)) {
+   names(out[[affdf]])<-lapply(unlist(strsplit(names(out[[affdf]]),"[.]")),drop_token1)
+   write.csv(out[[affdf]],file=paste("affymetrix",affdf,".txt",sep=""))
+ }
Error in names(out[[affdf]]) <- lapply(unlist(strsplit(names(out[[affdf]]),  : 
  'names' attribute [1148] must be the same length as the vector [118]
> 

This is what the header was before:

X0.Classical.10.11.1_.HuEx.1_0.st.v2..CEL

There was no output due to the error.

uab.edu
Knowledge that will change your world

________________________________________
From: Jim Lemon <drjimlemon at gmail.com>
Sent: Tuesday, March 22, 2016 5:46 PM
To: Christian T Stackhouse (Campus)
Cc: r-help at r-project.org
Subject: Re: [R] Help batch saving elements of a list into unique files

Sorry, should be:

names(out[[affdf]])<-
 lapply(unlist(strsplit(names(out[[affdf]]),"[.]")),drop_token1)

Jim

On Wed, Mar 23, 2016 at 9:43 AM, Christian T Stackhouse (Campus)
<ctstackh at uab.edu> wrote:
> Thank you, Jim. I got this error returned:
>
> Error in strsplit(names(out[[affdf]])) :
>   argument "split" is missing, with no default
>
> Christian T. Stackhouse | Graduate Student
> GBS Neuroscience Theme
> Department of Neurosurgery
> Department of Radiation Oncology
> UAB | The University of Alabama at Birmingham
> Hazelrig-Salter Radiation Oncology Center | 1700 6th Ave S | Birmingham, AL 35233
> M: 919.724.6890 | ctstackh at uab.edu | cstackhouse at uabmc.edu | ctstackh at gmail.com
>
> uab.edu
> Knowledge that will change your world
>
>
> ________________________________________
> From: Jim Lemon <drjimlemon at gmail.com>
> Sent: Tuesday, March 22, 2016 5:39 PM
> To: Christian T Stackhouse (Campus)
> Cc: r-help at r-project.org
> Subject: Re: [R] Help batch saving elements of a list into unique files
>
> Okay, I just snipped off the first token in the header labels assuming
> that there would be no more periods. Try this:
>
> drop_token1<-function(x) {
>  return(paste(x[2:length(x)],sep="."))
> }
> for(affdf in 1:length(out)) {
> names(out[[affdf]])<-lapply(unlist(strsplit(names(out[[affdf]]))),drop_token1)
> write.csv(out[[affdf]],file=paste("affymetrix",affdf,".txt",sep=""))
> }
>
> Jim
>
> On Wed, Mar 23, 2016 at 9:13 AM, Christian T Stackhouse (Campus)
> <ctstackh at uab.edu> wrote:
>> Jim,
>>
>> It worked! It wrote out the files, but unfortunately, it didn't work for the file headers. I should have mentioned this is what the headers look like: X0.Classical.10.11.1_.HuEx.1_0.st.v2..CEL
>> After running your script, that header changes to: 10. I'd just like to remove the "X0." prefix or in the case of file 189 the "X188." prefix leaving: Classical.10.11.1_.HuEx.1_0.st.v2..CEL
>>
>> Thank you so much for your help! I'll try playing with it myself, but if you have any further insights they would be greatly appreciated!
>>
>> Best,
>>
>> Christian T. Stackhouse | Graduate Student
>> GBS Neuroscience Theme
>> Department of Neurosurgery
>> Department of Radiation Oncology
>> UAB | The University of Alabama at Birmingham
>> Hazelrig-Salter Radiation Oncology Center | 1700 6th Ave S | Birmingham, AL 35233
>> M: 919.724.6890 | ctstackh at uab.edu | cstackhouse at uabmc.edu | ctstackh at gmail.com
>>
>> uab.edu
>> Knowledge that will change your world
>>
>>
>> ________________________________________
>> From: Jim Lemon <drjimlemon at gmail.com>
>> Sent: Tuesday, March 22, 2016 4:48 PM
>> To: Christian T Stackhouse (Campus)
>> Cc: r-help at r-project.org
>> Subject: Re: [R] Help batch saving elements of a list into unique files
>>
>> Hi Christian,
>> This untested script might get you going (assuming you want a CSV format):
>>
>> for(affdf in 1:length(out)) {
>>  names(out[[affdf]])<-lapply(strsplit(names(out[[affdf]]),"[.]"),"[",2)
>>  write.csv(out[[affdf]],file=paste("affymetrix",affdf,".txt",sep=""))
>> }
>>
>> Jim
>>
>>
>> On Wed, Mar 23, 2016 at 6:32 AM, Christian T Stackhouse (Campus)
>> <ctstackh at uab.edu> wrote:
>>> Hello!
>>>
>>>
>>> The overall goal I have is taking a large data frame and splitting it into several smaller data frames (preserving column headers) which I can save as txt files to feed into my APACHE ANY23 server for conversion into RDF.
>>>
>>>
>>> This is what I call to split up the original file:
>>>
>>>
>>> out <- split(affymetrix, (seq(nrow(affymetrix))-1) %/% 140)
>>>
>>>
>>> I have a list (out) of length 187 for which each element is a dataframe. I want to iteratively save each data frame as a separate tab file with a naming structure such as: affymetrix1.txt, affymetrix2.txt, ... affymetrix187.txt
>>>
>>>
>>> Before that, I need to modify the headers to remove a prefix "X0. , X1., ... X187." that was introduced during my original splitting. I need to remove all characters before and including the first "."
>>>
>>>
>>> If anyone has a better way of doing this, please let me know. Otherwise, help with how to perform batch editing of the headers and batch saving of the files would be greatly appreciated!
>>>
>>>
>>> Best,
>>>
>>> Christian T. Stackhouse | Graduate Student
>>> GBS Neuroscience Theme
>>> Department of Neurosurgery
>>> Department of Radiation Oncology
>>> UAB | The University of Alabama at Birmingham
>>> Hazelrig-Salter Radiation Oncology Center | 1700 6th Ave S | Birmingham, AL 35233
>>> M: 919.724.6890 | ctstackh at uab.edu | cstackhouse at uabmc.edu | ctstackh at gmail.com
>>>
>>> uab.edu<http://uab.edu/>
>>> Knowledge that will change your world
>>>
>>>
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