hadamardproduct_byname: Name-wise matrix Hadamard multiplication

In matsbyname: An Implementation of Matrix Mathematics that Respects Row and Column Names

Name-wise matrix Hadamard multiplication

Description

Performs a union and sorting of names of rows and columns for both multiplicand and multiplier for each sequential multiplication step. Zeroes are inserted for missing matrix elements. Doing so ensures that the dimensions of the multiplicand and multiplier are be conformable for each sequential multiplication.

Usage

hadamardproduct_byname(..., .summarise = FALSE)

Arguments

...	Operands; constants, matrices, or lists of matrices.
.summarise	When TRUE, operands are multiplied down lists. When FALSE (the default), items multiplied across lists.

Details

The Hadamard product is also known as the entrywise product.

Value

Name-wise element product of operands.

Examples

library(dplyr)
hadamardproduct_byname(2, 2)
commoditynames <- c("c1", "c2")
industrynames <- c("i1", "i2")
U <- matrix(1:4, ncol = 2, dimnames = list(commoditynames, industrynames)) %>%
  setrowtype("Commodities") %>% setcoltype("Industries")
G <- matrix(1:4, ncol = 2, dimnames = list(rev(commoditynames), rev(industrynames))) %>%
  setrowtype("Commodities") %>% setcoltype("Industries")
U * G # Not what is desired, because names aren't aligned
hadamardproduct_byname(U, G)
hadamardproduct_byname(U, G, G)
hadamardproduct_byname(U, 0)
hadamardproduct_byname(0, G)
# This also works with lists
hadamardproduct_byname(list(U, U), list(G, G))
DF <- data.frame(U = I(list()), G = I(list()))
DF[[1,"U"]] <- U
DF[[2,"U"]] <- U
DF[[1,"G"]] <- G
DF[[2,"G"]] <- G
hadamardproduct_byname(DF$U, DF$G)
DF %>% mutate(entrywiseprods = hadamardproduct_byname(U, G))
# Also works down lists with `.summarise = TRUE`.
hadamardproduct_byname(list(U, G), .summarise = TRUE)

matsbyname documentation built on May 29, 2024, 8:10 a.m.