entropy: Compute the Shannon entropy index from regions - industries...

Description Usage Arguments Author(s) References See Also Examples

View source: R/entropy.r

Description

This function computes the Shannon entropy index from regions - industries matrices from (incidence) regions - industries matrices

Usage

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entropy(mat)

Arguments

mat

An incidence matrix with regions in rows and industries in columns

Author(s)

Pierre-Alexandre Balland p.balland@uu.nl

References

Shannon, C.E., Weaver, W. (1949) The Mathematical Theory of Communication. Univ of Illinois Press.

Frenken, K., Van Oort, F. and Verburg, T. (2007) Related variety, unrelated variety and regional economic growth, Regional studies 41 (5): 685-697.

See Also

diversity

Examples

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## generate a region - industry matrix
set.seed(31)
mat <- matrix(sample(0:100,20,replace=T), ncol = 4)
rownames(mat) <- c ("R1", "R2", "R3", "R4", "R5")
colnames(mat) <- c ("I1", "I2", "I3", "I4")

## run the function
entropy (mat)

PABalland/EconGeo documentation built on Nov. 13, 2020, 2:50 a.m.