[R] non-standard reshape from long to wide

Yuan Chun Ding ycd|ng @end|ng |rom coh@org
Thu Jan 7 20:09:50 CET 2021

Hi Bert,

No, this Is not home work related.  Original data have 87352 rows. I used the standard reshape function and got warning message. So I reformatted the wide format to meet my research purpose.

mut2 <-mut[,c("Tumor_Sample_Barcode","mut.id", "Hugo_Symbol")]
mut2 <-mut2[order(mut2$Hugo_Symbol),]
mut3 <-mut2[!duplicated(mut2),]
mut4 <-reshape(mut3, idvar = "Hugo_Symbol", timevar = "Tumor_Sample_Barcode", direction = "wide")

There were 50 or more warnings (use warnings() to see the first 50)
> View(mut4)
> warnings()
Warning messages:
1: In reshapeWide(data, idvar = idvar, timevar = timevar,  ... :
  multiple rows match for Tumor_Sample_Barcode=TCGA-A8-A09Z-01A-11W-A019-09: first taken
2: In reshapeWide(data, idvar = idvar, timevar = timevar,  ... :
From: Bert Gunter [mailto:bgunter.4567 using gmail.com]
Sent: Thursday, January 7, 2021 10:52 AM
To: Yuan Chun Ding <ycding using coh.org>
Cc: r-help using r-project.org
Subject: Re: [R] non-standard reshape from long to wide

Is this homework? There is a no-homework policy on this list.

If not, note that you are usually asked to show what you tried and the error messages you received.

Bert Gunter

"The trouble with having an open mind is that people keep coming along and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )

On Thu, Jan 7, 2021 at 10:40 AM Yuan Chun Ding <ycding using coh.org<mailto:ycding using coh.org>> wrote:
Dear R user,

I want to reshape a long data frame to wide format, I made the following example files.  Can you help me?

Thank you,

Yuan Chun Ding

sample <-c("xr" , "xr" , "fh" , "fh" , "fh" , "uy" , "uy" , "uy" , "uy");
marker <-c("x" , "y" , "g" , "x" , "k" , "y" , "x" , "u" , "j");
df.long <-data.frame(sample, marker);

xr <-c(1,1,NA,NA,NA,NA);
fh <-c(1,NA,1,1,NA,NA);
uy <-c(1,1,NA,NA,1,1);

df.wide <- t(data.frame(xr,fh,uy));
colnames(df.wide)<-c("x","y","g","k", "u","j");


This message and any attachments are intended solely for the individual or entity to which they are addressed. This communication may contain information that is privileged, confidential, or exempt from disclosure under applicable law (e.g., personal health information, research data, financial information). Because this e-mail has been sent without encryption, individuals other than the intended recipient may be able to view the information, forward it to others or tamper with the information without the knowledge or consent of the sender. If you are not the intended recipient, or the employee or person responsible for delivering the message to the intended recipient, any dissemination, distribution or copying of the communication is strictly prohibited. If you received the communication in error, please notify the sender immediately by replying to this message and deleting the message and any accompanying files from your system. If, due to the security risks, you do not wish to receive further communications via e-mail, please reply to this message and inform the sender that you do not wish to receive further e-mail from the sender. (LCP301)

R-help using r-project.org<mailto:R-help using r-project.org> mailing list -- To UNSUBSCRIBE and more, see
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html<https://urldefense.com/v3/__http:/www.R-project.org/posting-guide.html__;!!Fou38LsQmgU!8Xh6f5YkEhmPfDyrfZAdBKkVH3I-iNCUoXNhMSZyF6JgRliIYBMD4qvlyPfu$>
and provide commented, minimal, self-contained, reproducible code.

	[[alternative HTML version deleted]]

More information about the R-help mailing list