Nothing
## ----include = FALSE----------------------------------------------------------
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>"
)
## ----setup, include = FALSE---------------------------------------------------
library(dplyr)
library(matsbyname)
library(tibble)
## -----------------------------------------------------------------------------
mysum <- function(a, margin = c(1, 2)) {
sum_func <- function(a_mat, margin) {
# When we get here, we will have a single matrix a
if (1 %in% margin & 2 %in% margin) {
return(sum(a_mat))
}
if (margin == 1) {
return(rowSums(a_mat) %>% matrix(nrow = nrow(a_mat)))
}
if (margin == 2) {
return(colSums(a_mat) %>% matrix(ncol = ncol(a_mat)))
}
}
unaryapply_byname(sum_func, a, .FUNdots = list(margin = margin))
}
## -----------------------------------------------------------------------------
m <- matrix(1:4, nrow = 2, byrow = TRUE)
m
# Works for single matrices
mysum(m, margin = 1)
mysum(m, margin = 2)
mysum(m, margin = c(1, 2))
## -----------------------------------------------------------------------------
# Works for lists of matrices
mysum(list(one = m, two = m), margin = 1)
mysum(list(one = m, two = m), margin = 2)
## -----------------------------------------------------------------------------
# Works in data frames and tibbles
DF <- tibble::tibble(mcol = list(m, m, m))
res <- DF %>%
dplyr::mutate(
rsums = mysum(mcol, margin = 1),
csums = mysum(mcol, margin = 2)
)
res$rsums
res$csums
## -----------------------------------------------------------------------------
tryCatch(mysum(list(m, m, m), margin = c(1, 2)),
error = function(e) {strwrap(e, width = 60)})
## -----------------------------------------------------------------------------
mysum(list(m, m), margin = c(1, 2))
## -----------------------------------------------------------------------------
mysum(list(m, m, m), margin = list(c(1, 2)))
## -----------------------------------------------------------------------------
mysum(list(m, m, m), margin = list(1, 2, c(1, 2)))
## -----------------------------------------------------------------------------
tryCatch(mysum(list(m, m, m), margin = list(1, 2)),
error = function(e) {strwrap(e, width = 60)})
## -----------------------------------------------------------------------------
mysum2 <- function(a, margin = c(1, 2)) {
margin <- prep_vector_arg(a, margin)
sum_func <- function(a_mat, margin) {
# When we get here, we will have a single matrix a
if (1 %in% margin & 2 %in% margin) {
return(sum(a_mat))
}
if (margin == 1) {
return(rowSums(a_mat) %>% matrix(nrow = nrow(a_mat)))
}
if (margin == 2) {
return(colSums(a_mat) %>% matrix(ncol = ncol(a_mat)))
}
}
unaryapply_byname(sum_func, a, .FUNdots = list(margin = margin))
}
## -----------------------------------------------------------------------------
mysum2(list(m, m, m), margin = c(1, 2))
## -----------------------------------------------------------------------------
mysum2(list(m, m), margin = c(1, 2))
## -----------------------------------------------------------------------------
mysum2(list(m, m), margin = list(c(1, 2)))
## -----------------------------------------------------------------------------
DF2 <- tibble::tibble(mcol = list(m, m), margin = c(1, 2))
DF2
DF2$margin %>% class()
## -----------------------------------------------------------------------------
res2 <- DF2 %>%
dplyr::mutate(
sums = mysum2(mcol, margin = margin)
)
res2$sums
## -----------------------------------------------------------------------------
DF3 <- tibble::tibble(mcol = list(m, m, m), margin = list(1, c(1, 2), c(1, 2))) %>%
dplyr::mutate(
sumcol = mysum2(mcol, margin = margin)
)
DF3$sumcol
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