EMMAgeo (version 0.9.8)

test.l.max: Find maximum possible wight transformation value.

Description

This function approximates the highest possible value for l in a nested loop. It uses test.l and does not need any further parameters. It starts with l between zero and 0.5 and iteratively approximates the last possible vlaues for which the weight-transformed matrix of the input data still allows eigenspace extraction.

Usage

test.l.max(X, n = 10, ...)

Value

Numeric scalar, maximal possible l value.

Arguments

X

Numeric matrix, input data set with m samples (rows) and n variables (columns).

n

Numeric scalar, number of loop runs and values per loop.

...

Further arguments passed to the function.

Author

Michael Dietze, Elisabeth Dietze

References

Dietze E, Hartmann K, Diekmann B, IJmker J, Lehmkuhl F, Opitz S, Stauch G, Wuennemann B, Borchers A. 2012. An end-member algorithm for deciphering modern detrital processes from lake sediments of Lake Donggi Cona, NE Tibetan Plateau, China. Sedimentary Geology 243-244: 169-180.
Klovan JE, Imbrie J. 1971. An Algorithm and FORTRAN-IV Program for Large-Scale Q-Mode Factor Analysis and Calculation of Factor Scores. Mathematical Geology 3: 61-77.

See Also

EMMA, test.l

Examples

## load example data set
data(example_X)

## create weight transformation limits vector
l <- seq(from = 0, to = 0.6, by = 0.05)

## test l.max (uncomment to run, may take more than 10 sec to run)
# l.max <- test.l.max(X = X)