US Crudes Data

Description

Cross-section data originating from 99 US oil field postings.

Usage

data("USCrudes")

Format

A data frame containing 99 observations on 3 variables.

price

Crude prices (USD/barrel).

gravity

Gravity (degree API).

sulphur

Sulphur (in %).

Source

The data is from Baltagi (2002).

References

Baltagi, B.H. (2002). Econometrics, 3rd ed. Berlin, Springer.

See Also

Baltagi2002

Examples

data("USCrudes")
plot(price ~ gravity, data = USCrudes)
plot(price ~ sulphur, data = USCrudes)
fm <- lm(price ~ sulphur + gravity, data = USCrudes)

## 3D Visualization
if(require("scatterplot3d")) {
  s3d <- scatterplot3d(USCrudes[, 3:1], pch = 16)
  s3d$plane3d(fm, lty.box = "solid", col = 4)
}

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(AER)
Loading required package: car
Loading required package: lmtest
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: sandwich
Loading required package: survival
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/AER/USCrudes.Rd_%03d_medium.png", width=480, height=480)
> ### Name: USCrudes
> ### Title: US Crudes Data
> ### Aliases: USCrudes
> ### Keywords: datasets
> 
> ### ** Examples
> 
> data("USCrudes")
> plot(price ~ gravity, data = USCrudes)
> plot(price ~ sulphur, data = USCrudes)
> fm <- lm(price ~ sulphur + gravity, data = USCrudes)
> 
> ## 3D Visualization
> if(require("scatterplot3d")) {
+   s3d <- scatterplot3d(USCrudes[, 3:1], pch = 16)
+   s3d$plane3d(fm, lty.box = "solid", col = 4)
+ }
Loading required package: scatterplot3d
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>