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  If \code{breaks} is specified then \code{zlim} is unused and the
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  If \code{breaks} is specified then \code{zlim} is unused and the
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  algorithm used follows \code{\link{cut}}, so intervals are closed on
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  algorithm used follows \code{\link{cut}}, so intervals are closed on
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  the right and open on the left except for the lowest interval which is
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  the right and open on the left except for the lowest interval which is
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  closed at both ends.
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  closed at both ends.
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  The axes, where plotted, make use of the classes of \code{xlim} and
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  The axes (where plotted) make use of the classes of \code{xlim} and
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  \code{ylim} (and hence by default the classes of \code{x} and
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  \code{ylim} (and hence by default the classes of \code{x} and
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  \code{y}): this will mean that for example dates are labelled as
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  \code{y}): this will mean that for example dates are labelled as
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  such.  (As from \R 3.1.0.)
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  such.  (As from \R 3.0.1.)
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  Notice that \code{image} interprets the \code{z} matrix as a table of
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  Notice that \code{image} interprets the \code{z} matrix as a table of
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  \code{f(x[i], y[j])} values, so that the x axis corresponds to row
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  \code{f(x[i], y[j])} values, so that the x axis corresponds to row
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  number and the y axis to column number, with column 1 at the bottom,
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  number and the y axis to column number, with column 1 at the bottom,
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  i.e. a 90 degree counter-clockwise rotation of the conventional
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  i.e. a 90 degree counter-clockwise rotation of the conventional