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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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 at 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"); > > ---------------------------------------------------------------------- > ------------------------------------------------------------ > -SECURITY/CONFIDENTIALITY WARNING- > > 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 at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. >[[alternative HTML version deleted]]
Hello,
Here is a dplyr solution. The main trick is to create a column of 1's,
then pipe to pivot_wider.
library(dplyr)
library(tidyr)
df.long %>%
mutate(values = 1) %>%
pivot_wider(
id_cols = sample,
names_from = marker,
values_from = values,
values_fill = NA
)
Note: your df.wide is not a data.frame, the transpose coerces it to
matrix. In this case it doesn't matter because it was just an example of
expected output but in other, real use cases you must be careful.
df.wide <- as.data.frame(df.wide)
would solve it.
Hope this helps,
Rui Barradas
?s 18:39 de 07/01/21, Yuan Chun Ding escreveu:> 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");
>
> ----------------------------------------------------------------------
> ------------------------------------------------------------
> -SECURITY/CONFIDENTIALITY WARNING-
>
> 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 at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>
Hi
dcast from reshape is close, however column order is different
mydf <- dcast(df.long, sample~marker)
(!is.na(mydf[,-1]))*1
g j k u x y
[1,] 1 0 1 0 1 0
[2,] 0 1 0 1 1 1
[3,] 0 0 0 0 1 1
You just need to change 0 to NA and add rownames from mydf.
Cheers
Petr
> -----Original Message-----
> From: R-help <r-help-bounces at r-project.org> On Behalf Of Yuan Chun
Ding
> Sent: Thursday, January 7, 2021 7:40 PM
> To: r-help at r-project.org
> Subject: [R] non-standard reshape from long to wide
>
> 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");
>
> ----------------------------------------------------------------------
> ------------------------------------------------------------
> -SECURITY/CONFIDENTIALITY WARNING-
>
> 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 at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.