Compute kth Order Differences of an Expression

Takes in an expression and returns an expression with the kth order differences along the given axis. The output shape is the same as the input except the size along the specified axis is reduced by k.

Usage

cvxr_diff(x, k = 1L, axis = 2L)

Arguments

x

An Expression or numeric value.

k

Integer. The number of times values are differenced. Default is 1. (Mapped from R's lag argument in diff.default; use differences for repeated differencing which maps to k here.)

axis

Integer. The axis along which the difference is taken. 2 = along rows/down columns (default), 1 = along columns/across rows.

Value

An Expression representing the kth order differences.