Displays table data as a contour plot.
CONTOUR(table, levels, incolor, labeling, factor)
table 
 
A multicolumn series. 

levels 
 
Optional. An Integer. The number of contour levels to draw. Defaults to 10. 

incolor 
 
Optional. An integer, the color flag:


labeling 
 
Optional. 4 or 8 Real numbers representing end points of labeling axes. Each axis is defined by two (x, y) coordinate pairs, either as x1, y1, x2, y2; or x1,y1, x2, y2, x3, y3, x4, y4. If four label points are entered, labels are drawn on an axis from (x1, y1) to (x2, y2). If eight label points are entered, labels are drawn on two axes: one axis from (x1, y1) to (x2, y2), and the second axis from (x3, y3) to (x4, y4). Defaults to no labels. 

factor 
 
Optional integer specifying the contour label factor. The factor specifies that every nth intersecting contour will be labeled. Defaults to 1. 
W1: spline2(rand(20), 4)
W2: contour(W1, 6, 0, 0.0, 0.0, 20.0, 20.0, 5)
shows contents of W1 as a 6 level contour, with labels drawn wherever the contour lines cross an Imaginary line with endpoints of (0.0, 0.0) and (20.0, 20.0) (i.e., a diagonal line). The background of the plot is not filled and every 5th intersecting contour is labeled.
W3: contour(W1, 6, 1, 0.0, 0.0, 20.0, 20.0, 5)
Same as above, except the background of the contour is filled based on the magnitude of the data and the current color map.
CONTOUR can be obtained by pressing [F7] or executing SETPLOTTYPE(2).
Up to two axes (eight real numbers specifying a total of four coordinates) can be specified for labeling.