Displaying 3 results from an estimated 3 matches for "lowertriangl".
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lowertriangle
2007 Apr 23
1
how to convert the lower triangle of a matrix to a symmetricmatrix
Sorry if this answer was already given, or if I miss the point,
but did you have a look to "lowerTriangle" and "upperTriangle" functions
in the "gdata" package ?
# example
# A<-matrix(rnorm(9),3,3)
# B<-B<-matrix(NA,dim(A)[1],dim(A)[2])
# lowerTriangle(B)<-lowerTriangle(A)
# upperTriangle(B)<-lowerTriangle(A)
# diag(B)<-diag(A)
Hope this helps, sorry if it...
2006 Nov 20
1
My own correlation structure with nlme
...ow how to continue with this structure by using
specific functions (corMatrix, getCovariate, Initialize,...) in order to
get a structure like corAR1, corSymm which will be working for my data.
Thanks in advance.
Regards
M. Feddag
*Correlation structure _
_*
pairCorr <- function(A, B, lowerTriangle = TRUE){
n <- length(A)
m <- length(B)
if (n != m) stop("A and B must have same length")
result <- matrix(0, n, n)
same.A <- outer(A, A, "==")
same.B <- outer(B, B, "==")
A.matches.B <- outer(A, B, "==")
B.matches.A <- ou...
2015 Nov 23
2
Dibujar en tres dimensiones para un dominio dado. Añadir curvas de nivel.
Hola,
Deseo dibujar en tres dimensiones la siguiente función
z= min( 1 - abs(x-0.7), 1 - abs(y-0.2))
en este dominio 0<= x <= y <=1
En el ejemplo que hay abajo, se dibuja para 0<=x<=1, 0<=y<=1. ¿Me pueden ofrecer alguna ayudita para dibujarla en el recinto 0<= x <= y <=1 ?
Y si además me indican cómo dibujar las proyecciones (curvas de nivel) en los planos XY, YZ y