image_locator

a raster object, or an image loaded by
<code>magick::image_read</code> or the filename of 
that image.

if it is FALSE (default), 
the result list 
contains the width and height values. 
If it is TRUE, only the left, right, top, bottom values 
of the rectangle 
designated by your clicking are returned.

rectangle

This function simply gets the width and 
height values of the points on which you click.
The result is a list of two vectors, the first 
vector is for width, the second for height.

An extension to 'ggplot2' and 'magick'. It contains
three groups of functions: Functions in the first group draw 'ggplot2' - based plots: geom_shading_bar() draws barplot
with shading colors in each bar. geom_rect_cm(), geom_circle_cm() and geom_ellipse_cm() draw rectangles, circles
and ellipses with centimeter as their unit. Thus their sizes do not change when the coordinate system or the aspect ratio
changes. annotation_transparent_text() draws labels with transparent texts. annotation_shading_polygon() draws irregular
polygons with shading colors. Functions in the second group generate coordinates for regular shapes and make linear transformations. Functions in the third group are 'magick' - based functions facilitating image processing.

image_locator: Get the Width and Height of the Mouse Clicked Points

Description

Usage

Arguments