Gives the result of raising all elements of a matrix or list of matrices to a power.

pow_byname(a, pow)

Arguments

a

a matrix of list of matrices

pow

the power to which elements of a will be raised

Value

a with each element raised to pow

Examples

library(dplyr) pow_byname(2, 3)
#> [1] 8
m <- matrix(2, nrow = 2, ncol = 3, dimnames = list(paste0("r", 1:2), paste0("c", 1:3))) %>% setrowtype("rows") %>% setcoltype("cols") pow_byname(m, 2)
#> c1 c2 c3 #> r1 4 4 4 #> r2 4 4 4 #> attr(,"rowtype") #> [1] "rows" #> attr(,"coltype") #> [1] "cols"
DF <- data.frame(m = I(list()), pow = I(list())) DF[[1, "m"]] <- m DF[[2, "m"]] <- m DF[[1, "pow"]] <- 0.5 DF[[2, "pow"]] <- -1 DF %>% mutate( sqrtm = pow_byname(m, 0.5), mtopow = pow_byname(m, pow) )
#> m pow sqrtm #> 1 2, 2, 2,.... 0.5 1.414214, 1.414214, 1.414214, 1.414214, 1.414214, 1.414214 #> 2 2, 2, 2,.... -1 1.414214, 1.414214, 1.414214, 1.414214, 1.414214, 1.414214 #> mtopow #> 1 1.414214, 1.414214, 1.414214, 1.414214, 1.414214, 1.414214 #> 2 0.5, 0.5, 0.5, 0.5, 0.5, 0.5