Displaying 20 results from an estimated 4000 matches similar to: "Count based on 2 conditions [Beginner Question]"
2012 Sep 20
3
Applying glm coefficients (Beginner Question)
Hello,
I am working with a dataset with three variables and one binomial parameter.
The glm function provides coefficients for these three variables, e.g.
-1.5 | 27.2 | -2.9
If I'm not mistaken, $fitted.values gives me an estimate of how likely my
parameter is to be true/1 . I would like to apply these coefficients on
other variables to predict the binomial parameter but I'm not sure how
2008 Apr 09
1
Replace values according to conditions
Greetings R-users,
I have the following data called mydata in a data.frame
Col1 Col2 Col3 Col4 Col5
1 2 4 6 7
8 8 7 3 5
4 4 5 6 7
I want to replace the data according to the following conditions
Condition 1 if data <= 3, replace with -1
Condition 2 if data >=6, replace with 1
Condition 3 if data = 4 or data =5, replace with 0
2010 Apr 06
2
Merging data frames on two conditions
Hi Guys
I have two data frames which I would like to merge on two conditions.
I am doing the following (abstract form)
new.data.frame <- merge(df1,df2, by=c("Col1","Col2"))
It is giving me a null result.
Basically I need to apply two conditions.
I also tried sqldf but it is running forever. Will indexing help ?
temp <- sqldf("select
2011 Mar 16
3
making dataframes
Dear all,
I have a dataframe which looks like this (dummy):
date<-c("jan", "feb", "mar", "apr", "may", "june", "july",
"aug","sep","oct","nov","dec")
col1<-c(8.2,5.4,4.3,4.1,3.1,2.5,1.1,4.5,3.2,1.9,7.8,6.5)
col2<-c(3.1,2.3,4.7,6.9,7.5,1.1,3.6,8.5,7.5,2.5,4.1,2.3)
2006 Mar 16
3
Did I use "step" function correctly? (Is R's step() function reliable?)
Hi all,
I put up an exhaustive model to use R's "step" function:
------------------------
mygam=gam(col1 ~ 1
+ col2 + col3 + col4
+ col2 ^ 2 + col3 ^ 2 + col4 ^ 2
+ col2 ^ 3 + col3 ^ 3 + col4 ^ 3
+ s(col2, 1) + s(col3, 1) + s(col4, 1)
+ s(col2, 2) + s(col3, 2) + s(col4, 2)
+ s(col2, 3) + s(col3, 3) + s(col4, 3)
+ s(col2, 4) + s(col3, 4) + s(col4, 4)
+ s(col2, 5) + s(col3,
2012 Aug 13
4
if else elseif for data frames
Hi all,
It seems like I cannot use normal 'if' for data frames. What would be the
best way to do the following.
if data$col1='high'
data$col2='H'
else if data$col1='Neutral'
data$col2='N'
else if data$col='low'
data$col2='L'
else
#chuch a warning?
Note that col2 was not an existing column and was newly assigned for this
2018 Feb 25
3
include
Thank you Jim,
I read the data as you suggested but I could not find K1 in col1.
rbind(preval,mydat) Col1 Col2 col3
1 <NA> <NA> <NA>
2 X1 <NA> <NA>
3 Y1 <NA> <NA>
4 K2 <NA> <NA>
5 W1 <NA> <NA>
6 Z1 K1 K2
7 Z2 <NA> <NA>
8 Z3 X1 <NA>
9 Z4 Y1 W1
On Sat, Feb 24, 2018 at 6:18 PM, Jim
2017 Aug 23
2
Comparing 2 dale columns
Dear R fellows,
I created a new column Date_flag to compare the dates of COL1 and COL2 using the code
below. But it showed that 5/1/15 is greater than 6/1/2014 and 5/1/2015 greater than
7/1/2014 despite the year is greater. How do I fix that? I did try to format as %y/%m/%d
but it does not fix that.
data$Date_Flag <- ifelse(data$COL2 > data$COL1, 0,1)
COL1 COL2
6/1/14
2018 Feb 25
0
include
Hi Val,
My fault - I assumed that the NA would be first in the result produced
by "unique":
mydat <- read.table(textConnection("Col1 Col2 col3
Z1 K1 K2
Z2 NA NA
Z3 X1 NA
Z4 Y1 W1"),header = TRUE,stringsAsFactors=FALSE)
val23<-unique(unlist(mydat[,c("Col2","col3")]))
napos<-which(is.na(val23))
preval<-data.frame(Col1=val23[-napos],
2006 Jun 07
2
help with combination problem
hello:
I have 3 data.frame objects.
First df object:
Of dim (149,31). Columns 2:31 are marked as T1..T14
and N1..N16.
Name T1 T2 N1 T3 N2 N3 N4 T4
mu1 10 10 9 10 9 9 8 10
mu2 11 11 9 11 9 9 9 11
...
muN 12 12 9 11 9 9 8 12
Second df object:
of Dim (50000,31). Columns 2:31 are maked as T1...T14
and N1..N16.
2018 Feb 25
2
include
HI Jim and all,
I want to put one more condition. Include col2 and col3 if they are not
in col1.
Here is the data
mydat <- read.table(textConnection("Col1 Col2 col3
K2 X1 NA
Z1 K1 K2
Z2 NA NA
Z3 X1 NA
Z4 Y1 W1"),header = TRUE,stringsAsFactors=FALSE)
The desired out put would be
Col1 Col2 col3
1 X1 0 0
2 K1 0 0
3 Y1 0 0
4 W1 0 0
6 K2 X1
2018 Feb 25
2
include
Sorry , I hit the send key accidentally here is my complete message.
Thank you Jim and all, I got it.
I have one more question on the original question
What does this "[-1] " do?
preval<-data.frame(Col1=unique(unlist(mydat[,c("Col2","col3")]))[-1],
Col2=NA,col3=NA)
mydat <- read.table(textConnection("Col1 Col2 col3
Z1 K1 K2
Z2
2013 Jan 11
3
split & rbind (cast) dataframe
Hi,
I would like to split dataframe based on one colum and want
to connect the two dataframes by rows (like rbind). Here a small example:
# The orgininal dataframe
df1 <- data.frame(col1 = c("A","A","B","B"),col2 = c(1:4), col3 = c(1:4))
# The datafame how it could look like
df2 <- data.frame(A.col2 = c(1,2), A.col3 = c(1,2), B.col2 = c(3,4),
B.col3
2017 Jun 21
4
selecting dataframe columns based on substring of col name(s)
Suppose I have the following sort of dataframe, where each column name
has a common structure: prefix, followed by a number (for this example,
col1, col2, col3 and col4):
d = data.frame( col1=runif(10), col2=runif(10),
col3=runif(10),col4=runif(10))
What I haven't been able to suss out is how to efficiently
'extract/manipulate/play with' columns from the data frame, making use
2004 Jul 05
2
More difficulties in getting data into R
In order to get around the problems of my posting a few minutes ago, I
thought:
$ awk -F\| '(NR > 2) {print $2}' cmie_firm_data.text > col2
$ awk -F\| '(NR > 2) {print $4}' cmie_firm_data.text > col4
$ paste col2 col4 | head -2
-510.45 -510.27
60700 101900
$ paste col2 col4 | tail -2
28648.12 31617.02
491014.77 494308.52
$ wc -l col2 col4
89323 col2
2017 Aug 23
0
Comparing 2 dale columns
Patrick,
## Run the following script an notice the different values of the dataframe "data" in each instance.
# I understand you have done something like the following:
data <- data.frame(COL1 = c("6/1/14", "7/1/14"),
COL2 = c("5/1/15", "5/1/15"), stringsAsFactors = FALSE)
data$Date_Flag <- ifelse(data$COL2 >
2010 Jul 24
2
union data in column
Is there any function/way to merge/unite the following data
GENEID col1 col2 col3 col4
G234064 1 0 0 0
G234064 1 0 0 0
G234064 1 0 0 0
G234064 0 1
2010 Oct 11
2
Split rows depending on time frame
Hi,
I have the following data frame, where col2 is a startdate and col3 an
enddate
COL1 COL2 COL3
A 40462 40482
B 40462 40478
The above timeframe of 3 weeks I would like to splits it in weeks like this
COL1 COL2 COL3 COL4
A 40462 40468 1
A 40469 40475 1
A 40476 40482 1
B
2017 Aug 23
2
Comparing 2 dale columns
Thanks. But when I apply your codes I get all NA instead of TRUE and FALSE
________________________________
From: PIKAL Petr <petr.pikal at precheza.cz>
Sent: Wednesday, August 23, 2017 11:20:00 AM
To: Patrick Casimir; r-help at r-project.org
Subject: RE: Comparing 2 dale columns
Hi
your code is wrong.
I get
> test<-read.table("clipboard", header=T)
> str(test)
2010 Mar 22
1
help needed with boxplot
I am new to R, can anyone help with boxplot for a dataset like:
file1 col1 col2 col3 col4 col5
050350005 101 56.625 48.318 RED
051010002 106 50.625 46.990 GREEN
051190007 25 65.875 74.545 BLUE
051191002 246 52.875 57.070 RED
220050004 55 70 80.274 BLUE
220150008 75 67.750 62.749 RED
220170001 77 65.750 54.307 GREEN
file2
col1 col2 col3 col4 col5
050350005 101 56.625 57 RED
051010002 106 50.625 77