Displaying 20 results from an estimated 100 matches similar to: "help with plotting lines linking two sets of points?"
2012 Jun 30
3
How to adjust the start of a series to zero? (i.e. subtract the first value from the sequence)
Hello,
I'd have a time series, where I am plotting the means and sd of a distance
for a variety of positions along a bird's bill. I'd like to set each line
(represented by "point") to start at zero, so that I can look at the
absolute change along the series. At the moment I only know how to do that
in Excel, by subtracting the value of time 1, point 1 from all other times
2010 Jun 28
2
sampling one random frame from each unique trial?
hello everyone. please bear with me if this is very easy...
I have a data set with many trials, and frames within each trial. I would
like to pull out one random frame from each trial.
here is an example. i have 4 unique trials (file), and various frames within
each (time_pred). I would like to randomly sample 4 rows, but 1 from each
trial (file).
this sample data is called "h"
2013 Jan 08
4
error in a abline loop
Hello
I have data of body length and body weight of people of different skin colors.
I tried to write a code to plot body length and body weight according
to the skin colors.
(Thanks for Petr's advice so far.)
A loop is used but an error shows up in the following code.
It says:
unexpected '}' in
"
2011 Mar 31
2
ANCOVA for linear regressions without intercept
Hello R experts
I have two linear regressions for sexes (Male, Female, Unknown). All have a good correlation between body length (response variable) and head length (explanatory variable). I know it is not recommended, but for a good practical reason (the purpose of study is to find a single conversion factor from head length to body length), the regressions need to go through the origin (0
2013 Jan 12
1
add categorical labels in plot
Hello
I want to draw a plot using the code below.
Further, I want to add labels (White, Yellow, Red) to x-axis.
Please kindly advise how to add the categorical labels, by modifying the
code.
Thank you.
Elaine
Code
dataN <-read.csv("H:/skin_color.csv",header=T, row.names=1)
dim(dataN)
dataN[1,]
str(dataN)
obs.group<-dataN$skin_color
2010 Apr 30
3
3D Surface plot
Dear All,
I want to create a surface plot from the data. My data set is consists of x,
y and z data.
I plotted in very easy way by Excel worksheet as shown in the attached
picture.
I did some steps in R, but I cannot have the same plot as in Excel
worksheet's figure.
the R code is
x <- c(-1,-0.75,-0.5,-0.25,0,0.25,0.5,0.75,1)
y<- c(-1,-0.75,-0.5,-0.25,0,0.25,0.5,0.75,1)
z<-
2008 Jan 15
2
Looking for simpler solution to probabilistic question
Hi
I have two processes which take with a certain probability (p1 and p2) x
number of years to complete (age1 and age2). As soon as thge first
process is completed, the second one begins. I want to calculate the
time it takes for the both processes to be completed.
I have the following script which gives me the answer, butI think there
must be a more elegant way of doing the calculations
2006 May 27
1
Trouble passing list or non-list to function using ...
Hello,
Simply put, I'm trying to call a function "testme" with value "age=NA". I wish to use "dotlist<-list(...)" inside the function and have dotlist become:
$age
[1] NA
I'm modifying existing code and need to minimize changing that code so it's easiest to conform
how I call the existing function.
My sample code fragment, results, and R.version
2004 Aug 09
0
Need help on this problem!
Hi everyone,
I have posted a similar question to this list, but I don't
get a reply. I really want to solve this problem, so I
post it again...
I am trying to use R to fit some mixed-effects models for
a nested data. The data is a simulated data with 111
subjects. Each subject has 6 waves' data. Below are the
first two subjects' data :
> simu1[1:12,]
Grouped Data: gf ~ age |
2002 Nov 26
1
Reshape by multiple variables
Dear list
I'm using the reshape command and want to reshape a wide data set to a
long one
e.g. I have the variables y1,y2,y3,age1,age2,age3,sex,ethnic
I want my new long data set to consist of the variables y (which has
been created from y1,y2,y3), age (which has been created from
age1,age2,age3), sex and ethnic
I have tried to use the command:
2006 Dec 01
1
Box Tidwell / Error Message
Dear R-Users,
I used the box.tidwell () function of the car Package.
When I used the following formula:
semi.sub.in.mi1.boxtidwell_h<-box.tidwell(RENT_LG ~ I(age+1)+I(age2+1)+X06A
+ I(X08B+1) + I(X22+1) + I(X24+1) + X31A, ~B_YEAR + C_X01 + C_X14 + C_X19 +
C_X29A +C_X21 + C_X23 + D_X12 + D_X17 + D_X18 + D_X25 + D_X27 + D_X30 +
D_X32 + D_X35, data = semi.sub.in.mi1)
everything is
2010 Feb 17
1
Ordered Logit in R
I'm trying to run an ordered logistic regression model. I've run the following code, but the output does not provide the p-values. Is there some command to include the p-values in the output.
reg2 <- polr(trade1 ~ age2 + education2 + personal2 + economy2 + partisan2 + employment2 + union2 + home2 + market2 + race2 + income2)
summary(reg2)
Re-fitting to get Hessian#
Call:
2002 Jul 11
1
nls() singular graident matrix error
R-helpers;
I used Proc Model in SAS to fit the following model to data:
proc model data = dbsmv;
a = a1*F**2;
b = b1*F + b2*T + b3*F*T;
tph2 = tph1 *((1 - exp(-a*age2)) / (1 -
exp(-a*age)))**-b;
fit tph2;
and yielded the following estimated parameters after iterations:
a1 = -0.15943, a2 = -1.8177, b1 = -0.01911, b2
2003 Apr 18
1
Help with nlme--freq weights, logit model, and more
Below you will find the output from a failed multi-level model run. I am
trying to estimate the following model:
Pr(PLFP=1)= logistic regression ->
B1_j * bm + B2_j * wm + B3_j bf + B4_j wf + B5 yrsed+ B6 age+ B7 age^2+e_ij
B1_j = G01 + G11 bmxd + d1
B2_j = G02 + G12 wmxd + d2
B3_j = G03 + G13 bfxd + d3
B4_j = G04 + G14 wfxd + d4
d1-d4 freely correlated
Note that there is no
2008 Nov 06
3
unlist & dataframes
Dear all,
I would like to know whether it is possible to unlist elements and keep the
original format of the data.
To make it more clear, let me give an exemple:
I have a list l of dataframes that I created with apply but which looks like
this:
x1=data.frame(Name=LETTERS[1:2],Age=1:2)
x2=data.frame(Name=LETTERS[3:4],Age=3:4)
l=list(x1,x2)
l
[[1]]
Name Age
1 A 1
2 B 2
[[2]]
Name
2013 Jan 10
1
Semi Parametric Bootstrap
Greetings to you all,
I am performing a semi parametric bootstrap in R on a Gamma Distributed
data and a Binomial distributed data. The main challenge am facing is
the fact that the residual variance depends on the mean (if I am correct).
I strongly feel that the script below may be wrong due to mean-variance
relationship
#####R code#######
fit1s
2008 May 12
1
Standard error of combination of parameter estimates
Hi,
Is there a simple command for computing the standard error of a
combination of parameter estimates in a GLM?
For example:
riskdata$age1 <- riskdata$age
riskdata$age2 <- ifelse(riskdata$age<67,0,riskdata$age-67)
model <- glm(death~age1+age2+ldl,
data=riskdata,family=binomial(link=logit))
And we want to find the standard error of the partial linear predictor
for
2011 Sep 26
0
Dragon Age2 (need help installation)
Hi, i'am with Wine 1.3.15 and i had install Dragon Age 2 succesful, but the game didn't want start, Wine crash.
I make some search and i found that, the folder "actvation.exe" tell
:Runtime Error!
Program: C:Program Files/Core/activation.exe
R6034
An application has made an attempt to load the C runtime library incorrectly.
I want to know if i can do something with this?
2008 May 09
2
how to check linearity in Cox regression
Hi, I am just wondering if there is a test available for testing if a linear fit of an independent variable in a Cox regression is enough? Thanks for any suggestions.
John Zhang
____________________________________________________________________________________
[[elided Yahoo spam]]
2007 Mar 05
1
Matrix/dataframe indexing
Hi all,
I am hoping someone can help me out with this:
If I have dataframe of years and ages and the first column and first row
are filled with leading values:
Df<- age1 age2 age3
Yr1 1 0.4 0.16
Yr2 1.5 0 0
Yr3 0.9 0 0
Yr4 1 0 0
Yr5 1.2 0 0
Yr6 1.4 0 0
Yr7 0.8 0 0
Yr8 0.6 0 0
Yr9 1.1 0 0
Now the rest of the cells need to be filled according to the previous
year and age