[R] non-standard reshape from long to wide

[Yuan Chun Ding]

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");

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