img2coord

R package to guess coordinates from a scatter plot (as an image).

Have a look at the blog post introducing this package.

Installation and usage

devtools::install_github("privefl/img2coord")
library(img2coord)
?get_coord

Example

Input image

Code

get_coord(
  "tmp-png/prs_bc.png",
  x_ticks = seq(0, 12, 2),
  y_ticks = 52:57 / 100, 
  K_min = 10, 
  K_max = 30
)

Guessed points

$x
 [1]  0.01520296  0.06552700  0.12944550  0.20691062  0.30601816  0.44235022
 [7]  0.64579483  0.94394015  1.37816199  2.01197712  2.93945782  4.29281100
[13]  6.27131190  9.15847062 13.37825095

$y
 [1] 0.5690193 0.5697159 0.5688519 0.5672777 0.5669924 0.5662357 0.5641564 0.5626848
 [9] 0.5586805 0.5497790 0.5453504 0.5513921 0.5612438 0.5511934 0.5183720

attr(,"stat")
       10        11        12        13        14        15        16        17 
2.5465144 2.9717697 3.7322112 5.0965441 5.7161786 6.8027607 5.0551897 4.4568252 
       18        19        20        21        22        23        24        25 
3.1147767 2.5863611 2.2906541 1.8843363 1.5162134 1.2102533 1.1990416 1.0414757 
       26        27        28        29        30 
0.9038069 0.7874264 0.7213993 0.6518794 0.6580587