PostScript setup

The setup section of a Frida PostScript file (between markers ewu and ecu) controls the appearance of every element in the plot. It is a copy of g3.ps and can be customized.

Size and aspect ratio

10 dup autolabel defsiz    % global figure size = 10; autolabel scales symbols
1 dup geld stdred           % reduction factor 1; geld ≈ 0.76 (landscape)

autolabel applies a sublinear transformation so that symbols and labels remain legible when a figure is embedded at a smaller size. stdred sets the reduction and aspect ratio simultaneously.

The effect: the same data at large embedding size (top) versus small (bottom). Without autolabel, symbols and labels become unreadably tiny; with defsiz 6, defred 2 they scale back up.

Predefined aspect ratio operators:

Operators starting with capital G are the inverses (portrait orientations). Omit the operator entirely for a square frame.

To double the figure size: replace 1 with 2 in the stdred line.

Symbols and colors

1 dup 2 SymGSet        % symbol size=1, linewidth=1, error bars=mode 2
F /pcol x def          % F=colored symbols, T=black/white
{ 8 aCol5 iColA } /ipCol x bind def   % color sequence aCol5, 8 colors

Predefined color sequences aCol1–aCol5 offer different palettes. Individual colors are set by i ni aColX where i ∈ [0, ni−1].

Plot symbols are selected with pstyle:

i pstyle    % select plot style i from the pStyles array

Curve styles

1. [ ] lset        % solid line, width 1
1. [4 2] lset      % dashed line, 4 on / 2 off
i cstyle           % select curve style i from cStyles array