Easily Gate or Select Points on a Scatter Plot

Allows user to choose/gate a region on the plot and returns points within it.


Wajid Jawaid 2016-12-15

Installation

gatepoints can be installed from Github or through CRAN.

library(devtools)
install_github("wjawaid/gatepoints")

The package can be downloaded from CRAN using:

install.packages("gatepoints")

Usage example

gatepoints provides an easy to use function, fhs (freehand select) for gating or selecting points freehand on a plot. If using from RStudio please use X11 display for a better user experience. Take the simple plot below:

x <- data.frame(x=1:10, y=1:10, row.names = 1:10)
plot(x, pch = 16, col = "red")

library(gatepoints)
selectedPoints <- fhs(x, mark = TRUE)

To select an arbitrarily complex region run the above commands and proceed as follows:

  1. Mark region of your choice by left clicking around your region of interest.
  2. Close polygon by right clicking. On the Windows platform click stop after right clicking.

The points can be marked as defined by the user with additional parameters passed to the points function. The names of the points as given by the rownames of the data frame x will be returned in selectedPoints. Additionally the points selected for the gate will be returned as the gate attribute.

selectedPoints
#> [1] "4" "5" "7"
#> attr(,"gate")
#>          x        y
#> 1 6.099191 8.274120
#> 2 8.129107 7.048649
#> 3 8.526881 5.859404
#> 4 5.700760 6.716428
#> 5 5.605314 5.953430
#> 6 6.866882 3.764390
#> 7 3.313575 3.344069
#> 8 2.417270 5.217868

News

Reference manual

It appears you don't have a PDF plugin for this browser. You can click here to download the reference manual.

install.packages("gatepoints")

0.1.3 by Wajid Jawaid, 3 months ago


https://github.com/wjawaid/gatepoints


Browse source code at https://github.com/cran/gatepoints


Authors: Wajid Jawaid [aut, cre]


Documentation:   PDF Manual  


GPL (>= 2) license


Suggests testthat, knitr, rmarkdown


See at CRAN