projnorm {hierSDR}

Norm of difference of projections

Description

Measures distance between two subspaces

Usage

projnorm(B1, B2)

Arguments

B1

first matrix

B2

second matrix

Value

scalar value of the projection difference norm between B1 and B2

Examples

b1 <- matrix(rnorm(10 * 2), ncol = 2)
b2 <- matrix(rnorm(10 * 2), ncol = 2)
projnorm(b1, b2)

## angle here should be smalls
b1 <- matrix(rnorm(10 * 2), ncol = 2)
b2 <- b1 + matrix(rnorm(10 * 2, sd = 0.2), ncol = 2)
projnorm(b1, b2)