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welcome|IDL lets you create and interactively man-
showing|ipulate all types of plots, from X-Y plots
interact|to sophisticated polar plots with symbols.
selecto|Select the type of plot to create. Alter
mouse|the plot's attributes using the controls.
perio|Select the period of the signal.
symbo|Select the variance and the symbol.
varia|Select the variance.
color|Select the color.
thick|Select the line thickness.
locat|Select the text location.