Mean t-Statistic Between Two Groups of Growth Curves
The mean-t statistic of the distance between two groups of growth curves.
meanT(y1, y2)
y1 |
matrix of response values for the first group, with a row for each individual and a column for each time. Missing values are allowed. |
y2 |
matrix of response values for the second group. Must have the same number of columns as |
This function computes the pooled two-sample t-statistic between the response values at each time, and returns the mean of these values weighted by the degrees of freedom.
This function is used by compareGrowthCurves.
numeric vector of length one containing the mean t-statistic.
Gordon Smyth
y1 <- matrix(rnorm(4*3),4,3) y2 <- matrix(rnorm(4*3),4,3) meanT(y1,y2) data(PlantGrowth) compareGrowthCurves(PlantGrowth$group,as.matrix(PlantGrowth$weight)) # Can make p-values more accurate by nsim=10000
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