It converts a list of symmetric matrices into a stacked matrix. Dimensions of the symmetric matrices have to be the same. It tries to preserve the dimension names if possible. Dimension names will be created if there is no dimension names in the first symmetric matrix.

1 | ```
list2matrix(x, diag = FALSE)
``` |

`x` |
A list of |

`diag` |
Logical. If it is |

A *k* x *p** stacked matrix where *p*
= p(p-1)/2* for `diag`

=`FALSE`

or *p* = p(p+1)/2* for `diag`

=`TRUE`

.

Mike W.-L. Cheung <mikewlcheung@nus.edu.sg>

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | ```
C1 <- matrix(c(1,0.5,0.4,0.5,1,0.2,0.4,0.2,1), ncol=3)
C2 <- matrix(c(1,0.4,NA,0.4,1,NA,NA,NA,NA), ncol=3)
## A list without dimension names
list2matrix(list(C1, C2))
# x2_x1 x3_x1 x3_x2
# [1,] 0.5 0.4 0.2
# [2,] 0.4 NA NA
dimnames(C1) <- list( c("x","y","z"), c("x","y","z") )
dimnames(C2) <- list( c("x","y","z"), c("x","y","z") )
## A list with dimension names
list2matrix(list(C1, C2))
# y_x z_x z_y
# [1,] 0.5 0.4 0.2
# [2,] 0.4 NA NA
``` |

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