Displaying 3 results from an estimated 3 matches for "galton2".
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galton
2004 Feb 20
3
problem with abline for x.y
...ith both regression
lines and data ellipses,
and I must be doing something wrong, because the lines do not intersect
at \bar{x}, \bar{y}.
The problem is likely in the line for x.y, but I don't know how to
specify that correctly.
The data is read in grouped form( galton), and then ungrouped (galton2):
galton <- read.table("~/sasuser/data/galton.txt", header=TRUE)
# ungroup
galton2<-galton[rep(1:nrow(galton), galton$frequency), 1:2]
attach(galton)
sunflowerplot(child, parent, number=frequency, xlim=c(61,75),
ylim=c(61,75),
xlab="Child height", ylab="Mid Par...
2003 Sep 25
3
ungrouping grouped data
...72.5 69.2 2
72.5 70.2 1
72.5 71.2 2
72.5 72.2 7
72.5 73.2 2
72.5 74.2 4
71.5 65.2 1
71.5 66.2 3
71.5 67.2 4
71.5 68.2 3
71.5 69.2 5
71.5 70.2 10
...
and need the ungrouped equivalent, where each input observation
appears the number of times represented by its frequency. In SAS
this would be
data galton2;
set galton;
do i=1 to frequency;
output;
end;
I can replicate this in R, but surely there must be an easier way.
(In APL2 it would be frequency\[1]galton)
thanks,
-Michael
--
Michael Friendly Email: friendly at yorku.ca
Professor, Psychology Dept.
York University V...
2003 Sep 25
0
AW: ungrouping grouped data
...70.2 1
72.5 71.2 2
72.5 72.2 7
72.5 73.2 2
72.5 74.2 4
71.5 65.2 1
71.5 66.2 3
71.5 67.2 4
71.5 68.2 3
71.5 69.2 5
71.5 70.2 10
...
and need the ungrouped equivalent, where each input observation
appears the number of times represented by its frequency. In SAS
this would be
data galton2;
set galton;
do i=1 to frequency;
output;
end;
I can replicate this in R, but surely there must be an easier way.
(In APL2 it would be frequency\[1]galton)
thanks,
-Michael
--
Michael Friendly Email: friendly at yorku.ca
Professor, Psychology Dept.
York Univ...