digitizr: a wrapper for the magick package, focussed on extracting data...

In alexmitrani/humblr: Provides a few humble tools for R.

a wrapper for the magick package, focussed on extracting data from images containing graphs

Description

a wrapper for the magick package, focussed on extracting data from images containing graphs

Usage

digitizr(
  inputfilename = NULL,
  outputfilename = NULL,
  xvarname = NULL,
  yvarname = NULL,
  xmin = NULL,
  xmax = NULL,
  ymin = NULL,
  ymax = NULL,
  yscalemax = NULL,
  threshold = NULL,
  mygraphsize = 1000
)

Arguments

inputfilename	Name of the input image file. This file should contain only the graph area, not the axes, titles or legends.
outputfilename	Name to be used for the output image file (PNG format).
xvarname	Name to be used for the x variable.
yvarname	Name to be used for the y variable.
xmin	Minimum x value.
xmax	Maximum x value.
ymin	Minimum y value.
ymax	Maximum y value.
yscalemax	Maximum value to be used for the y-scale.
threshold	The threshold is a percentage written as a character string, e.g. "70%". Some experimentation might be needed to find the value that works best.
mygraphsize	The graph size in pixels.

Examples

myinputfile <- system.file("extdata", "ari.png", package = "humblr")
extracted_data <- digitizr(inputfilename=myinputfile, outputfilename="extracted_data_graph.png", xvarname="año", yvarname="millones de pasajeros", xmin=2020, xmax=2050, ymin=0.928253, ymax=4.159696, yscalemax=5, threshold="70%")

alexmitrani/humblr documentation built on April 4, 2022, 8:29 a.m.