chron(age, depths, max.depth, type = "l", linear = TRUE, method = "fmm", ci = TRUE, dates = "points" , length = 0.05, digits = 2)
"points"to display dates as red points, or
"bars"to display dates as error bars spanning the provided standard deviation of calibrated ages.
max depthand with deviation if
ci=TRUE. The deviation is calculated according to the error provided by the user, therefore it does not necessarily correspond to 0.95 intervals.
chroncalculates interpolated ages using linear interpolation or spline as
method. It is based on a three-column matrix with depth of dated interval, calibrated age, and calibrated standard deviation. The interpolated ages are calculated for a set of depths (defined by the user in
depths). Whenever the stratigraphic sequence goes beyond the last dated point, the age for the bottom samples is extrapolated.
max.depthis the maximum depth of the stratigraphic sequence, including dates and sampled points. Confidence intervals correspond to the provided chronology deviation. Therefore, it does not necessarily correspond to 0.95 interval.
If there is need to repeat a depth (e.g the floor and roof of a hiatus), the two numbers must be differentiated by at least decimal positions.
plotfor details on graphic parameters,
approxfor details on linear interpolation, and
splinefor details on non-linear interpolation.