Dear Community,
i have read in a table with two column from a *txt-File. What i get is a
data-frame wit two column.
After that i allocate this 2 column to x and y. Plotting this, i obtain a
picture that looks like a bar plot (something like a grid).
Is that because x and y is in factor-formatted? A conversion with
"asnumeric" doesnt work. I get a vector with "NA".
Here is my code:
daten<-read.table("C:/Users/Robert/Desktop/regen.txt",
header=FALSE,
colClasses=c("real","real"))
x<-daten[,1]
y<-daten[,2]
plot(x,y)
Greetings
--
View this message in context:
http://r.789695.n4.nabble.com/Simple-x-y-Plot-tp4638262.html
Sent from the R help mailing list archive at Nabble.com.
Hi,
As there is not much information like str() or the data, it is difficult to
comment.
But, try this (considering your x and y are factors):
x<-c("1","4","7","9","10","15")
?y<-c("3","5","8","6","5","14")
?dat1<-data.frame(x,y)
?str(dat1)
'data.frame':??? 6 obs. of? 2 variables:
?$ x: Factor w/ 6 levels "1","10","15",..: 1 4 5 6
2 3
?$ y: Factor w/ 5 levels
"14","3","5","6",..: 2 3 5 4 3 1
dat2<-dat1
?dat2$x<-as.numeric(as.character(dat2$x) )
?is.numeric(dat2$x)
#[1] TRUE
?dat2$y<-as.numeric(as.character(dat2$y))
?is.numeric(dat2$y)
#[1] TRUE
#Now try plot
?x1<-dat2[,1]
?y1<-dat2[,2]
?plot(x1,y1)
Hope this helps.
A.K.
----- Original Message -----
From: sappy <robert.wittkopf at gmx.de>
To: r-help at r-project.org
Cc:
Sent: Sunday, July 29, 2012 11:18 AM
Subject: [R] Simple x,y Plot
Dear Community,
i have read in a table with two column from a *txt-File. What i get is a
data-frame wit two column.
After that i allocate this 2 column to x and y. Plotting this, i obtain a
picture that looks like a bar plot (something like a grid).
Is that because x and y is in factor-formatted? A conversion with
"asnumeric" doesnt work. I get a vector with "NA".
Here is my code:
daten<-read.table("C:/Users/Robert/Desktop/regen.txt",
header=FALSE,
colClasses=c("real","real"))
x<-daten[,1]
y<-daten[,2]
plot(x,y)
Greetings
--
View this message in context:
http://r.789695.n4.nabble.com/Simple-x-y-Plot-tp4638262.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help at r-project.org 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.
On 29.07.2012 17:18, sappy wrote:> Dear Community, > > i have read in a table with two column from a *txt-File. What i get is a > data-frame wit two column. > After that i allocate this 2 column to x and y. Plotting this, i obtain a > picture that looks like a bar plot (something like a grid). > Is that because x and y is in factor-formatted? A conversion with > "asnumeric" doesnt work. I get a vector with "NA". > > Here is my code: > > daten<-read.table("C:/Users/Robert/Desktop/regen.txt", header=FALSE, > colClasses=c("real","real"))As you are german, I suppose you used the comma as decimal separator. You need to specify that in read.table by dec="," or R won't be able to parse your numbers. daten<-read.table("C:/Users/Robert/Desktop/regen.txt", header=FALSE,dec=",) Viele Gr??e, Moritz -- GnuPG Key: 0x7340821E
On 2012-07-29 08:18, sappy wrote:> Dear Community, > > i have read in a table with two column from a *txt-File. What i get is a > data-frame wit two column. > After that i allocate this 2 column to x and y. Plotting this, i obtain a > picture that looks like a bar plot (something like a grid). > Is that because x and y is in factor-formatted? A conversion with > "asnumeric" doesnt work. I get a vector with "NA".Why don't you run str(daten) on the data.frame to see what you actually imported? It's a good idea to always run a str() after reading data. And I wouldn't use 'real' as a colClass (although it does have an 'as' method); I don't see it mentioned on the help page for read.table. Peter Ehlers> > Here is my code: > > daten<-read.table("C:/Users/Robert/Desktop/regen.txt", header=FALSE, > colClasses=c("real","real")) > x<-daten[,1] > y<-daten[,2] > plot(x,y) > > Greetings > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Simple-x-y-Plot-tp4638262.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org 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. >