Call: PLOT_CONTOURS

matrix

The Matrix to be plotted.

This matrix should be 2-dimensional, and have a length of at least 2 in both directions. In the descriptions, the first index of the matrix will be written x, the second y.

The overall size of the matrix is limited to an amount that depends on the graphics system used (NAG or HIGZ) but is in both cases very large (around 10000 words at least).

n_contours

Number of contours to be drawn. If the ROUND option is used, this number is used as an indication only - the actual number will usually be larger.

The permissible range depends on the underlying graphics system, but usually covers [2,50].

options

A string containing options chosen from the following list. Most options are only applicable to one graphics system and are neglected on the others.

Option	Effect	Notes
`POLAR`	Polar coordinate system	Not with HIGZ
`CARTESIAN`	Cartesian coordinate system	-
`ROUND`	Select nearest round numbers for contour heights	-
`LABEL`	Labels the contours	Not with HIGZ
`COLOUR`	Produces a colour map, or colours the contours	Not with NAG
`TYPE`	Distinguish the contours by line type	Not with NAG

x-vector

A 1-dimensional Matrix with the x-coordinates of the matrix that is to be plotted.

Only the first and last element are used to set the scale along the x-axis of the plot.

If omitted, a range of [0, 1] is assumed.

y-vector

A 1-dimensional Matrix with the y-coordinates of the matrix that is to be plotted.

Only the first and last element are used to set the scale along the x-axis of the plot.

If omitted, a range of [0, 1] is assumed.

x-label

A String to be placed along the x-axis.

This label will be shown using the text representation LABELS.

If omitted, the name of the global variable associated with x-vector is used, if there is one, otherwise the string 'x-axis' is taken.

y-label

A String to be placed along the y-axis.

This label will be shown using the text representation LABELS.

If omitted, the name of the global variable associated with y-vector is used, if there is one, otherwise the string 'y-axis' is taken.

title

A String to be placed above the plot.

The title will be shown using the text representation TITLE.

If omitted, the name of the global variable associated with matrix is used, if there is one, otherwise the title is left blank.

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Formatted on 21/01/18 at 16:55.