Read data in Tilia format

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Description

Reads data in Tilia format used by the Tilia program for plotting stratigraphic diagrams.

Usage

1
read.Tilia(fName)

Arguments

fName

filename to read.

Details

read.Tila reads data in the Tilia format. Tilia is a program written by Eric Grimm to plot stratigraphic diagrams and is popular with palynologists. Note that any spaces or other illegal characters in the species codes will be converted to decimal places on import.

Value

Returns a list with three names elements:

data

data frame with species as columns and sites as rows. Column and row names are taken from the Tilia file.

vars

names and types of each variable in the dataset.

levels

names depths, and optionally ages of each level in the core.

Note

The code uses a combination of C and C++ and needs 1-byte structure alignment to read the Tilia binary file. It works on 32 bit systems but currently generates an error on some 64-bit Linux systems.

Author(s)

Steve Juggins

See Also

read.CEP.

Examples

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## Not run: 
pth <- system.file("example.datasets/WOLSFELD.TIL", package="rioja")
WOLS <- read.Tilia(pth)
sel <- WOLS$vars$Sums == "A" | WOLS$vars$Sums == "B"
spec <- WOLS$data[, sel]
totals <- apply(spec, 1, sum)
spec.pc <- spec / totals * 100
mx <- apply(spec.pc, 2, max)
spec.sub <- spec.pc[, mx > 5]
age <- WOLS$levels$Chron2
strat.plot(spec.sub, scale.percent=TRUE, yvar=age, y.rev=TRUE,
      wa.order="bottomleft")

## End(Not run)

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