printMatEqn | R Documentation |
This function is designed to print a collection of matrices, vectors, character strings and matrix expressions side by side. A typical use is to illustrate matrix equations in a compact and comprehensible way.
printMatEqn(..., space = 1, tol = sqrt(.Machine$double.eps), fractions = FALSE)
... |
matrices and character operations to be passed and printed to the console. These
can include named arguments, character string operation symbols (e.g., |
space |
amount of blank spaces to place around operations such as |
tol |
tolerance for rounding |
fractions |
logical; if |
NULL; A formatted sequence of matrices and matrix operations is printed to the console
Phil Chalmers
showEqn
A <- matrix(c(2, 1, -1, -3, -1, 2, -2, 1, 2), 3, 3, byrow=TRUE) x <- c(2, 3, -1) # provide implicit or explicit labels printMatEqn(AA = A, "*", xx = x, '=', b = A %*% x) printMatEqn(A, "*", x, '=', b = A %*% x) printMatEqn(A, "*", x, '=', A %*% x) # compare with showEqn b <- c(4, 2, 1) printMatEqn(A, x=paste0("x", 1:3),"=", b) showEqn(A, b) # decimal example A <- matrix(c(0.5, 1, 3, 0.75, 2.8, 4), nrow = 2) x <- c(0.5, 3.7, 2.3) y <- c(0.7, -1.2) b <- A %*% x - y printMatEqn(A, "*", x, "-", y, "=", b) printMatEqn(A, "*", x, "-", y, "=", b, fractions=TRUE)
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