Creates a diagram as described by Taylor (2001). The graph is in the form
of a semicircle, with radial lines and spokes connecting at a focus point on
the flat (lower) edge. The radius of a point on the graph indicates the
standard deviation of the corresponding quantity, i.e. x and the columns in
y. The angle connecting a point on the graph to the focus provides an
indication of correlation coefficient with respect to x. The ``east'' side
of the graph indicates \(R=1\), while \(R=0\) is at the
"north" edge and \(R=-1\) is at the "west" side. The x
data are indicated with a bullet on the graph, appearing on the lower edge
to the right of the focus at a distance indicating the standard deviation of
`x`. The other points on the graph represent the columns of `y`,
coded automatically or with the supplied values of `pch` and
`col`.
The example shows two tidal models of the Halifax sealevel data, computed
with tidem() with just the M2 component and the S2 component;
the graph indicates that the M2 model is much better than the S2 model.
plotTaylor(x, y, scale, pch, col, labels, pos, ...)Arguments
- x
a vector of reference values of some quantity, e.g. measured over time or space.
- y
a matrix whose columns hold values of values to be compared with those in x. (If
yis a vector, it is converted first to a one-column matrix).- scale
optional scale, interpreted as the maximum value of standard deviation.
- pch
list of characters to plot, one for each column of
y.- col
list of colors for points on the plot, one for each column of
y.- labels
optional vector of strings to use for labelling the points.
- pos
optional vector of positions for labelling strings. If not provided, labels will be to the left of the symbols.
- ...
optional arguments passed by
plotTaylorto more child functions.
References
Taylor, Karl E., 2001. Summarizing multiple aspects of model performance in a single diagram, J. Geophys. Res., 106:D7, 7183--7192.
