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# Example 3 -- Controlling scales, etc # # Example of how to control axis scales, etc. This example makes # two panels, plotting the same data in different ways. # # # ----- PANEL 2 ------------------------------------------------ # # Set up the x axis. # # Make the x axis run from 0 to 1, with labelled tics each 0.25. set x axis 0 1 .25 # Make the plot 5 cm wide. set x size 5 # 2 cm of space between the left edge of the plot # and the left edge of the paper. set x margin 2 # Give the x-axis the name "t" with subscript 0. set x name "$t_0$" # # Set up the y axis. # # Make the y axis run from 10 to 20, with labelled tics at intervals # of 5 and smaller, unlabelled, tics, at intervals of 1. Other # commands are similar to those for the x-axis. set y axis 10 20 5 1 set y size 10 set y margin 2 set y name "F" # # Now, read our simple data set. open example1.dat read columns x y close # # Draw a curve connecting these (x,y) data. Note that the axes, as # defined above, will be drawn automatically along with the curve. draw curve # # ----- PANEL 2 ----------------------------------------- # # OK, now for a more complicated version. We'll keep the # same data, but redraw it in a new panel, to the right of # the first graph. So, the first step is to increase the # x margin. The rpn command creates a number which is # the sum of the old x margin (stored in the variable # ..xmargin..) and the old plot width (stored in # the variable ..xsize..), plus an extra 1 cm set x margin {rpn ..xsize.. ..xmargin.. + 1 +} # # Set the line thickness for the curve to 1 point (0.3 mm) and the # axis line thickness to 0.2 points (0.1 mm). set line width 1.0 # points set line width axis 0.2 # points # Set the tics to be 1.5 mm. set tic size 0.15 # centimetres # Draw axes and frame, with axes offset from frame. Some # people find this more attractive. set axes style offset draw axes 1 # Now draw the actual curve. draw curve # Superimpose dots (radius 1.5 mm) at the data. set symbol size 0.15 draw symbol bullet # # All done. # Draw a title above the plot. set font size 20 \label = "Example 3 -- scales, axes, etc" draw label "\label" centered at \ {rpn 2 5 + .5 + } \ {rpn ..ytop.. yusertocm 2 +} cm