Mercer and Hall wheat yield data

Description

This data was taken from the R package `spdep'. The description from the package is as follows:

Mercer and Hall wheat yield data, based on version in Cressie (1993), p. 455.

Format

This is a three column csv file, the data in which was made available by Hongfei Li. There are 500 observations on the following 6 variables.

• lat: local coordinates northings ordered north to south

• lon: local coordinates eastings

• yield: Mercer and Hall wheat yield data

Note

• These are /local/ lat-lon coordinates.

• The value of 4.03 was changed to 4.33 (wheat[71,]) 13 January 2014; thanks to Sandy Burden; cross-checked with http://www.itc.nl/personal/rossiter/teach/R/mhw.csv, which agrees.

References

Cressie, N. A. C. (1993) Statistics for Spatial Data. Wiley, New York, p. 455.
Mercer, W. B. and Hall, A. D. (1911) The experimental error of field trials. Journal of Agricultural Science 4, 107-132.