germinationmetrics (version 0.1.3)

CUGerm: Coefficient of uniformity of germination

Description

Compute the Coefficient of uniformity of germination (CUG).

Usage

CUGerm(germ.counts, intervals, partial = TRUE)

Arguments

germ.counts

Germination counts at each time interval. Can be partial or cumulative as specified in the argument partial.

intervals

The time intervals.

partial

logical. If TRUE, germ.counts is considered as partial and if FALSE, it is considered as cumulative. Default is TRUE.

Value

The value of the coefficient of uniformity of germination as .

Details

CUG is computed as follows heydecker_seed_1972,bewley_seeds:_1994germinationmetrics.

Where, is the the mean germination time, is the time from the start of the experiment to the th observation (day for the example); is the number of seeds germinated in the th time (not the accumulated number, but the number correspondent to the th observation), and is the last time of germination.

References

See Also

GermSynchrony, MeanGermTime

Examples

# NOT RUN {
x <- c(0, 0, 0, 0, 4, 17, 10, 7, 1, 0, 1, 0, 0, 0)
y <- c(0, 0, 0, 0, 4, 21, 31, 38, 39, 39, 40, 40, 40, 40)
int <- 1:length(x)

# From partial germination counts
#----------------------------------------------------------------------------
CUGerm(germ.counts = x, intervals = int)

# From cumulative germination counts
#----------------------------------------------------------------------------
CUGerm(germ.counts = y, intervals = int, partial = FALSE)

# }