Displaying 5 results from an estimated 5 matches for "atrix".
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2004 Feb 06
1
How to get the pseudo left inverse of a singular squarem atrix?
>I'm rusty, but not *that* rusty here, I hope.
>
>If W (=Z*Z' in your case) is singular, it can not
have >inverse, which by
>definition also mean that nothing multiply by it will
>produce the identity
>matrix (for otherwise it would have an inverse and
>thus nonsingular).
>
>The definition of a generalized inverse is something
>like: If A is a
>non-null matrix, and G satisfy AGA = A, then G is
>called a generalized
>inverse of A. This is not unique, but a unique one
>that satis...
2003 Aug 14
0
How to get the pseudo left inverse of a singular square m atrix?
I'm rusty, but not *that* rusty here, I hope.
If W (=Z*Z' in your case) is singular, it can not have inverse, which by
definition also mean that nothing multiply by it will produce the identity
matrix (for otherwise it would have an inverse and thus nonsingular).
The definition of a generalized inverse is something like: If A is a
non-null matrix, and G satisfy AGA = A, then G is called a generalized
inverse of A. This is not unique, but a unique one that satisfy some
additional properties is...
2008 Jul 18
1
manipulate a matrix2
Building upon Jim's answer below (Thanks Jim, that helped a lot), I need
to pickup where this thread left off. I'm using Vegan to calculate the
Jaccard's Index and the Row.Names and column names are represented in my
matrix as seen here.
[,3] [,5] [,6] [,9] [,11]
[3,] 0 6 11 16 21
[5,] 2 0 12 17 22
[6,] 3 8 0 18 23
[9,] 4 9 14 0 24
[11,] 5 10 15 20 0
When I use the command;
xy <- cbind(row=as.vector(row.names(x)), col=as.vector(colnames...
2010 Nov 07
1
can't load nlme on windoze 7
...-c corStruct.c -
o corStruct.o
gcc -I"C:/pfs/R/R-2.11.1/include"???????? -O3 -Wall? -std=gnu99 -c gnls.c -o gnl
s.o
gcc -I"C:/pfs/R/R-2.11.1/include"???????? -O3 -Wall? -std=gnu99 -c init.c -o ini
t.o
gcc -I"C:/pfs/R/R-2.11.1/include"???????? -O3 -Wall? -std=gnu99 -c matrix.c -o m
atrix.o
gcc -I"C:/pfs/R/R-2.11.1/include"???????? -O3 -Wall? -std=gnu99 -c nlOptimizer.c
?-o nlOptimizer.o
gcc -I"C:/pfs/R/R-2.11.1/include"???????? -O3 -Wall? -std=gnu99 -c nlme.c -o nlm
e.o
gcc -I"C:/pfs/R/R-2.11.1/include"???????? -O3 -Wall? -std=gnu99 -c nlm...
2011 Nov 16
0
Rip Blu-ray to Transformer Prime-Mac Blu-ray to Transformer
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