Venus Semidiameters

Fifteen observations of the vertical semidiameter of Venus, made by Lieutenant Herndon, with the meridian circle at Washington, in the year 1846.

Herndon's observations are a classic dataset commonly used in examples demonstrating outlier detection.

Usage

var data = require( '@stdlib/datasets/herndon-venus-semidiameters' );

data()

Returns fifteen observations of the vertical semidiameter of Venus, made by Lieutenant Herndon, with the meridian circle at Washington, in the year 1846.

var d = data();
// returns [ -0.30, -0.44, ..., 0.39, 0.10 ]

Examples

var incrgrubbs = require( '@stdlib/stats/incr/grubbs' );
var data = require( '@stdlib/datasets/herndon-venus-semidiameters' );

var opts;
var acc;
var d;
var i;

// Get the data:
d = data();

// Create a new accumulator for detecting an outlier using Grubbs' test:
opts = {
    'init': d.length
};
acc = incrgrubbs( opts );

// Update the accumulator...
for ( i = 0; i < d.length; i++ ) {
    acc( d[ i ] );
}

// Print the test results:
console.log( acc().print() );

CLI

Usage

Usage: herndon-venus-semidiameters [options]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.

Notes

Data is written to stdout as newline-delimited data.

Examples

$ herndon-venus-semidiameters
-0.30
-0.44
1.01
0.48
-0.24
0.06
0.63
-0.13
-1.40
-0.22
-0.05
0.20
0.18
0.39
0.10

References

Chauvenet, William. 1868. A Manual of Spherical and Practical Astronomy. 5th ed. Vol. 5. London, England: Trübner & Co.
Grubbs, Frank E. 1950. "Sample Criteria for Testing Outlying Observations." The Annals of Mathematical Statistics 21 (1). The Institute of Mathematical Statistics: 27–58. doi:10.1214/aoms/1177729885.
Grubbs, Frank E. 1969. "Procedures for Detecting Outlying Observations in Samples." Technometrics 11 (1). Taylor & Francis: 1–21. doi:10.1080/00401706.1969.10490657.
Tietjen, Gary L., and Roger H. Moore. 1972. "Some Grubbs-Type Statistics for the Detection of Several Outliers." Technometrics 14 (3). Taylor & Francis: 583–97. doi:10.1080/00401706.1972.10488948.

License

The data files (databases) are licensed under an Open Data Commons Public Domain Dedication & License 1.0 and their contents are licensed under Creative Commons Zero v1.0 Universal. The software is licensed under Apache License, Version 2.0.