p7Calc: P7. Annual temperature range
In BioCalc: Bioclim Variables Calculator

Description Usage Arguments Details Value Author(s) References See Also Examples

Calculates the isothermality (P5 - P6) based upon previously calculated bioclimatics

1	p7Calc(p5, p6, outfile, format='')

`p5`	a RasterLayer object being P5: max. temp. warmest month
`p6`	a RasterLayer object being P6: min. temp. coldest month
`outfile`	Name of the output file
`format`	The format of your input files. Can be GRD, ASCII, BIL...

This function is based upon several features of the raster package (available at sourceforge.net). Application of the functions take very long since they are cell-by-cell calculations (when not enough space in memory is available). So, any efficient contributions would be very useful.

A RasterLayer object with the averaged values of the monthly input files, and the raster itself stored as a file.

Julian Ramirez, dawnpatrolmustaine@gmail.com

Busby J.R. 1991. BIOCLIM: a bioclimatic analysis and prediction system. In C.R. Margules, M.P. Austin, eds. Nature conservation: cost effective biological surveys and data analysis, pp. 64, 68. Canberra, Australia, Commonwealth Scientific and Industrial Research Organisation (CSIRO).

BioCalc, LoadMonthlyFiles

# Folder where your data is stored (in ascii format, for example)
#
# Load the files
# p5 <- raster("C://MyOutput//P5.asc")
# p6 <- raster("C://MyOutput//P6.asc")
#
# Now calculate the bioclimatic variable
# outputfile <- "C://MyOutput//P7.asc"
# p7 <- p7Calc(p5, p6, outputfile, format='ascii')
#