Description Usage Arguments Value
Internal function. Calculates the crude one-sided difference quotients and the second-order difference quotients based on the height data and the observed time points.
1 |
data |
As in |
tobs |
As in |
YI |
An N times (n-1) matrix with rows given by the values of the one-sided difference quotients y_i, i=1…, n-1 for the N subjects. |
Xtilda |
An n by N matrix with columns given by the values of the second-order difference quotients y for the N subjects. |
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