rotation {peco} | R Documentation

## Rotate circular variable shift_var to minimize distance between ref_var and shift_var

### Description

Because the origin of the cell cycle phases is arbitrary, we transform the angles prior to computing the distance (rotation and shifting) to minimize the distance between two vectors. After this, one can apply circ_dist to compute the distance between the output value and ref_var.

### Usage

    rotation(ref_var, shift_var)

### Arguments

`ref_var` | A vector of reference angles.
`shift_var` | A vector of angles to be compared to ref_var.

### Value

The transformed values of shift_var after rotation and shifting.

### Author(s)

Matthew Stephens

### Examples

    # a vector of angles
    theta_ref <- seq(0,2*pi, length.out=100)

    # shift the origin of theta_ref to pi
    theta_compare <- shift_origin(theta_ref, origin = pi)

    # rotate theta_compare in a such a way that the distance
    # between theta_ref and thet_compare is minimized
    theta_compare_rotated <- rotation(ref_var=theta_ref, shift_var=theta_compare)

    par(mofrow=c(1,2))
    plot(x=theta_ref, y = theta_compare)
    plot(x=theta_ref, y = theta_compare_rotated)

[Package peco version 1.2.0 Index]