ggtikzTransform: Transform TikZ coordinates according to scale transformations

In osthomas/ggtikz: Post-Process 'ggplot2' Plots with 'TikZ' Code Using Plot Coordinates

Transform TikZ coordinates according to scale transformations

Description

ggtikzTransform extracts coordinates definitions in an annotation's TikZ code and transforms them with the transformer functions stored in the underlying plot's x or y scales, respectively.

Usage

ggtikzTransform(ggtikzCanvas, ggtikzAnnotation)

Arguments

ggtikzCanvas	A link{ggtikzCanvas} object.
ggtikzAnnotation	A link{ggtikzAnnotaton} object.

Details

This function does not have to called directly. It is automatically called when annotations are added to a canvas, if transform = TRUE in the ggtikzAnnotation construction call.

Coordinates components with physical lengths are not changed. For a plot with a linear x scale and a log10-transformed y scale,

• the TikZ coordinate (10,10) becomes (10,1),

• the TikZ coordinate (10cm,10) becomes (10cm,1),

• the TikZ coordinate (10,10cm) becomes (10,10cm)

• the TikZ coordinate (0,0) will raise an error.

Value

A link{ggtikzAnnotation} object, with transformations applied to the coordinates in the TikZ code.

osthomas/ggtikz documentation built on June 16, 2024, 6:55 a.m.