Web host forum - Chapter 21 . Working with Words and Images
Chapter 21 . Working with Words and Images 563 Adding Equations, Tables, and Pictures To interpret special macros for equations, tables, and line drawings, you must run separate commands (eqn, tbl, and pic commands) on the source file before you run the groff command. Alternatively, you can add options to the groff command line to have the file preprocessed automatically by any of the commands (-e for eqn, -t for tbl, and -p for pic). Here are some examples of EQN, TBL, and PIC markup included in a Groff document. The first example shows an equation that can be processed by eqn: .EQ a ~ mark = ~ 30 .EN .sp .EQ a sup 2 ~ + ~ b sup 2~lineup = ~ 1000 .EN .sp .EQ x sup 3 ~ + ~ y sup 3 ~ + ~ z sup 3~lineup = ~ 1400 .EN If this appeared in a memo called memoeqn.mm, the memo would be preprocessed by eqn and then sent to the printer using the following command: $ groff -Tps -l -mm -e memoeqn.mm All data between the .EQ and .EN macros are interpreted as equations. The resulting output from the equation would appear as shown in Figure 21-7. Figure 21-7: Produce equations in documents with the use of the eqn command s .EQ and .EN macros.
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