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D[ash] <dash type> <element type> <range>....changes the dash type for subsequent plotting of grid, vector and contour elements. Dash types range from 1 to 3. Example : DASH 2 CON 2 4 will change the dash type to 2 for contour elements 2, 3 and 4.
Dash type 0 denotes a solid line, and -1 denotes colour shading for contours and vectors.
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[Dash] specifies the line type. There are 4 types of line which can be drawn in PHOTON. Type 0 is for a solid line.
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The line type of the current GRID.
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The line type of the current VECTOR.
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The line type of the current CONTOUR element if it was drawn with isolines.
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The line type of the current STREAMLINES element.
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The line type of the current SURFACE element.
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[Dash] specifies the line type for [Line], [Polyline], [Arc] and [Circle].
If a plot contains several data elements, you may wish to distinguish them by using various kinds of dashed lines. This may be effetced by way of by the DOTn command, which is used in the same way as the PLOT command. The n in this command represents a single digit and must not be preceded by a space. The value of n determines the type of dashed line to be used, as follows:
DOT1-Short Dash
DOT2-Dash-Dot
DOT3-Medium Dash
DOT4-Long Dash
DOT5-Very Long Dash
Some of the dashed lines generated by these commands may differ slightly, depending on the graphics terminal used.
Suppose you wish to plot three sets of data; the first drawn with solid lines, the second with dashed lines and the third with small circles at the data points. You achieve this by the following sequence of commands:
DATA; PLOT; DATA; DOT; DATA; BLOB; SCALE
The final SCALE ensures that all of the data elements will be shown within the axis window. As another example, suppose that there is one data element to be shown by small circles, and three more to be shown by finely-dashed lines. The following command sequence is now required:
DATA; BLOB; DATA; DATA; DATA; DOT; SCALE
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