racurves: Multiple rank-abundance curves
In goeveg: Functions for Community Data and Ordinations

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

View source: R/racurves.r

This function draws multiple rank-abundance curves for selected samples into one diagram. If you wish to draw a simple rank-abundance curve see racurve.

1	racurves(matrix, main = "Rank-abundance diagram", bw = TRUE)

`matrix`	Community data, a matrix-like object with samples in rows and species in columns. Rank-abundance curves are drawn for all selected rows (samples).
`main`	The main title (optional).
`bw`	If set on `FALSE` the lines will be drawn in colours instead of black/white lines with different line types.

Rank abundance curves or Whittaker plots (see Whittaker 1965) are used to display relative species abundance as biodiversity component. They are a means to visualise species richness and species evenness.

The axes of the diagram will be scaled according automatically. As the line type is used to differenciate between samples, a maximum of 6 curves per diagram is feasible in black/white mode.

Friedemann Goral ([email protected])

Whittaker, R. H. (1965). Dominance and Diversity in Land Plant Communities: Numerical relations of species express the importance of competition in community function and evolution. Science 147 : 250-260.

racurve

## Draw multiple rank-abundance curves for selected samples
racurves(schedenveg[c(1,7,20,25), ])

## Draw multiple rank-abundance curves for selected samples with coloured lines
racurves(schedenveg[c(1,7,20,25), ], bw = FALSE)