Displaying 3 results from an estimated 3 matches for "25.153".
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15.153
2003 Feb 26
1
calculationg condition numbers
am I right in the assumption, that for calculation of the condition
numbers I have to use the correlation matrix of X, and not t(x) %*% x?
> e <- eigen(t(x) %*% x)
better (x must not have a first column of ones):
> e <- eigen(cor(x))
> e$val
[1] 6.6653e+07 2.0907e+05 1.0536e+05 1.8040e+04 2.4557e+01 2.0151e+00
> sqrt(e$val[1]/e$val)
[1] 1.000 17.855 25.153 60.785 1647.478
2009 Apr 14
3
scatterplot3d
Dear R-help,
I am having trouble with your scatterplot3d program. For help with this
problem I was directed to your address by Martin Maechler at "
r-core-bounces at r-project.org." I'm also sending a CC to "
r-core-owner at r-project.org" as I'm not yet certain of the proper address to
use for this.
I have R version 2.8.1 and have downloaded 'scatterplot3d.'
2013 Apr 22
7
Multiple lon lat points in the map with ggplot2
Hello R users,
For the last few days I am struggling with the following task:
my data.frame:
A1 A2 A3 B1 B2
B3
58.81 53.292 54.501 13.013 17.39 19.407 56.02 56.251 54.033 20.099 13.15
10.411 55.376 53.099 57.625 13.396 21.031 13.22 58.584 53.194 54.218
13.038 16.854 19.289 55.7 55.921 53.847 19.942 13.153 9.828 55.093 52.934