R solve() Equation with Examples

R solve() is a generic function that solves the linear algebraic equation a %*% x = b for x, where b can be either a vector or a matrix. For example 10 * x = 20, in this equation, 10 is the coefficient; 20 is a constant and solve() calculates x which is 2. 1. Quick Examples of solve() Function in R Following are quick examples of solve() function that solves the different equations. # calculate x using solve() solve(10, 20) solve(3, 6) solve(4, 20) # with two variables a <- matrix(c(3,1,4,1),nrow=2,ncol=2) b <- matrix(c(10,4),nrow=2,ncol=1) print(a) print(b) res <- solve(a,b) print(res) # with matrix a <- c(2, 1) b <- c(5, 3) xyz <- rbind(a, b) print(xyz) solve(xyz) # with 4x4 matrix a <- c(2, 1, 3, 3) b <- c(5, 3, 5, 4) c <- c(6, 5, 9, 6) d <- c(1, 3, 2, 2) xyz <- rbind(a, b, c, d) print(xyz) res <- solve(a=xyz) print(res) 2. solve() Syntax Below is the syntax of the solve() equation function. # Syntax of solve() solve(a, b, …) The following are the parameters. a – A square numeric or complex matrix. It is the coefficients of the equation. b – A numeric or complex vector or matrix of the equation. It is optional. Further arguments passed to or from other methods.