colprods_byname {matsbyname} | R Documentation |
Column products, sorted by name
Description
Calculates column products (the product of all elements in a column) for a matrix.
An optional rowname
for the resulting row vector can be supplied.
If rowname
is NULL
or NA
(the default),
the row name is set to the row type as given by rowtype(a)
.
Usage
colprods_byname(a, rowname = NA)
Arguments
a |
A matrix or data frame from which column products are desired. |
rowname |
The Name of the output row containing column products. |
Value
a row vector of type matrix
containing the column products of a
.
Examples
library(dplyr)
M <- matrix(c(1:6), nrow = 2, dimnames = list(paste0("i", 1:2), paste0("c", 3:1))) %>%
setrowtype("Industries") %>% setcoltype("Commodities")
colprods_byname(M)
colprods_byname(M, rowname = "E.ktoe")
M %>% colprods_byname %>% rowprods_byname
# This also works with lists
colprods_byname(list(M, M))
colprods_byname(list(M, M), rowname = "E.ktoe")
colprods_byname(list(M, M), rowname = NA)
colprods_byname(list(M, M), rowname = NULL)
DF <- data.frame(M = I(list()))
DF[[1,"M"]] <- M
DF[[2,"M"]] <- M
colprods_byname(DF$M[[1]])
colprods_byname(DF$M)
colprods_byname(DF$M, "prods")
res <- DF %>% mutate(
cs = colprods_byname(M),
cs2 = colprods_byname(M, rowname = "prod")
)
res$cs2
[Package matsbyname version 0.6.10 Index]