Readers,
Data set:
20170101,10020,A,b,Y
20170101,10020,B,b,N
20170101,10020,C,d,Y
20170102,20001,C,d,Y
20170102,20001,D,m,Y
20170102,20001,L,a,Y
testtable<-read.csv('~/tmp/data.csv',header=F)
testtablea<-testtable[grep('^10',testtable[,2]),]
testtable
V1V2 V3 V4 V5
1 20170101 1002
Readers,
Could someone please explain how to apply the function 'ifelse' to
change a vector, for various conditions?
testseq<-seq(1:20)
testchange<-ifelse(testseq<=4,'x',testseq)
testchange<-c(ifelse(testseq<=4,'x',testseq),ifelse(testseq>=5,'y',testseq))
The last instruction causes the vecto
Readers,
The attempt is to create a bar plot with text labels adjacent to each
datum value.
Data file:
1,3,A
1,8,B
1,1,C
1,9,D
2,5,C
2,4,E
2,2,F
2,0,G
testbarplot<-read.csv('data1.csv', header=FALSE)
barplot(axes=FALSE, ann=FALSE, horiz=TRUE, testbarplot[,2], ylab=
'group', xlab= '(x values)
Readers,
For data set:
a, 90, 10
b, 60, 40
c, ,
d, , 50
A plot was attempted:
dataset<-as.matrix(read.csv("datafile.csv",header=FALSE))
barplot<-(dataset,horiz=TRUE)
A warning message is returned, about NAs introduced by coercion and an
undesirable graph. The desired out
Readers,
For a matrix:
1 10 20 30
2 15 40 60
3 20 80 120
Using a spreadsheet, a differential function can be applied to the data
as a formula:
|(10-15)/(1-2)| ... repeated for each pair of adjacent values
What is the corresponding function in R please?
Is it better to write a new function, or
On 2014-05-22 13:08, Sarah Goslee wrote:
It's possible that a package is not available for your OS or version
of R, but you don't tell us either.
For the record, GNU/Linux R2110
That FAQ doesn't say that R is capable of downloading it for you: you
need to download the package manually, the
repository?
Sometimes, a dependent package is reported as being un-available, e.g.:
install.packages("mclust")
Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
package ‘mclust’ is not available
Alternatively, tried the command 'R CMD':
R CMD IN
On 2014-05-22 11:00, Berend Hasselman wrote:
uniroot(function(x) 5*x - 55, c(0, 10))
Error in uniroot(function(x) 5 * x - 55, c(0, 10)) :
f() values at end points not of opposite sign
I don’t believe this.
The error message says it all.
5*0-55 ==> -55
5*10-55 ==> -5
The error
On 2014-05-20 10:00, r-help-requ...@r-project.org wrote:
--
Message: 32
Date: Mon, 19 May 2014 23:04:27 +0100
From: Rui Barradas
To: message , r-help@r-project.org
uniroot(function(x) 5*x - 55, c(0, 20))
Why does this instruction fail if the interval is changed
Readers,
The function 'solve' states that it is applicable to a vector or matrix
object.
Please what is the syntax to solve a very simple equation like:
5x + 1 = 56
The books read so far give explanations for simultaneous linear
equations or differential equations, but there have not been a
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