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"xlog" — Use a logarithmic x axis."ylog" — Use a logarithmic y axis."xexact" — Force x-axis minimum and maximum to be set to the scan endpoints(as opposed to being rounded)."colors" — Enable the use of colors."dots" — Draw graphics-mode points with large dots."lines" — Connect graphics-mode points with lines."ebars" — Draw vertical lines through each point of length equal to the twicethe square root of the y value."persist" — Keep graphics mode on after ordinary user input."perpetual" — Keep graphics mode on continuously (appropriate if using Xwindows, for example).Other plot_cntl() options are:"colors=bgnd:win:text:axis:symb:..." — Assigns colors for drawing the variousgraphics-mode elements. The values for bgnd (the background colorof the area outside the axis), win (the background color of the areainside the axis), text (the color of the text), axis (the color of the axis)and symb ... (the color of the plotting symbols) are integers.The first 10 colors are standardized according to the following table:0 background (normally white or black)1 foreground (normally black or white)2 blue 3 red4 green 5 yellow6 cyan 7 magenta8 white 9 blackOther colors may be available depending on the particular device. Youdon’thave to assign values to all colors."colors[numb]" — Returns the current color assignments, where numb is anumber between zero and 67. Numbers zero through three return thecolors assigned to the bgnd , win , text and axis elements re<strong>spec</strong>tively.Numbers from 4 through 67 return the colors assigned to the symbolsfor data elements zero through 63."filternumb" — Selects filter number numb ,where numb can be any of thenumerals from 1 through 5. All plotting commands are directed to thisfilter. The default filter is filter 1. Each filter is associated with a separateprocess. On an X windows display, each filter is associated with aseparate window.INTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION REFERENCE MANUAL 111

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