posmod: Modify Specific Elements of a Vector in Different Ways

In danjamesadams/Dantools: A Veritable Plethora of Helper Functions

Description

Carry out alternative arithmetic operations on different elements of a vector. Intended for use when specifying plot annotations using objects.

Usage

posmod(vector, positions, operations, numbers)

Arguments

vector	The vector to alter.
positions	The indices of the elements of the vector to alter.
operations	Mathematical operations to carry out (in conjunction with numbers) on the specified vector elements. Some degree of work-around may be needed (i.e. to square a number, set operations to '*' and the numbers element to the same as the vector element).
numbers	The numbers that are used at the end of the operation.

Examples

vector <- rep(1, times = 5)
posmod(vector = vector, positions = c(2, 4), operations = c('+', '-'), numbers = c(1, 1))
[1] 1 2 1 0 1

danjamesadams/Dantools documentation built on Aug. 24, 2019, 6:15 p.m.