# R Dataset / Package datasets / rock

Webform
Category

Webform
Category

Webform
Category

Webform
Category

Webform
Category

Webform
Category

## Visual Summaries

Embed
<iframe src="https://embed.picostat.com/r-dataset-package-datasets-rock.html" frameBorder="0" width="100%" height="307px" />
Attachment Size
1.27 KB
Dataset Help

On this Picostat.com statistics page, you will find information about the rock data set which pertains to Measurements on Petroleum Rock Samples. The rock data set is found in the datasets R package. You can load the rock data set in R by issuing the following command at the console data("rock"). This will load the data into a variable called rock. If R says the rock data set is not found, you can try installing the package by issuing this command install.packages("datasets") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the rock R data set. The size of this file is about 1,296 bytes.

Documentation

## Measurements on Petroleum Rock Samples

### Description

Measurements on 48 rock samples from a petroleum reservoir.

### Usage

rock

### Format

A data frame with 48 rows and 4 numeric columns.

 [,1] area area of pores space, in pixels out of 256 by 256 [,2] peri perimeter in pixels [,3] shape perimeter/sqrt(area) [,4] perm permeability in milli-Darcies

### Details

Twelve core samples from petroleum reservoirs were sampled by 4 cross-sections. Each core sample was measured for permeability, and each cross-section has total area of pores, total perimeter of pores, and shape.

### Source

Data from BP Research, image analysis by Ronit Katz, U. Oxford.

--

Dataset imported from https://www.r-project.org.