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| author | Jeffrey H. Kingston <jeff@it.usyd.edu.au> | 2010-09-14 20:41:52 +0000 |
|---|---|---|
| committer | Jeffrey H. Kingston <jeff@it.usyd.edu.au> | 2010-09-14 20:41:52 +0000 |
| commit | 66b683579143de15598c16695df72d1b224c2030 (patch) | |
| tree | 1dfc6d44e7517fb3e1fe838239daac263948bbf5 /doc/user/gra_func | |
| parent | 3c59753b94d0425e7ddcc4b57b11dfb283d0c144 (diff) | |
| download | lout-66b683579143de15598c16695df72d1b224c2030.tar.gz | |
Lout 3.37.
git-svn-id: http://svn.savannah.nongnu.org/svn/lout/trunk@43 9365b830-b601-4143-9ba8-b4a8e2c3339c
Diffstat (limited to 'doc/user/gra_func')
| -rw-r--r-- | doc/user/gra_func | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/doc/user/gra_func b/doc/user/gra_func index a2471bd..a2d6fdc 100644 --- a/doc/user/gra_func +++ b/doc/user/gra_func @@ -11,23 +11,23 @@ available everywhere that x and y coordinates are required: within the @Code xticks and @Code yticks options, within the points within the @Code "objects" option, and within the right parameter of the @Code "@Data" symbol. For example, -@ID @OneRow @Code { -"@Data" -" pairs { solid }" -"{" -" 0 0 pi sin { pi/2 }" -"}" +@ID @OneRow @Code @Verbatim { +@Data + pairs { solid } +{ + 0 0 pi sin { pi/2 } +} } -draws a solid line from @Eq {(0, 0)} to @Eq {(pi, sin(pi "/" 2))}. Section +draws a solid line from @M {(0, 0)} to @M {(pi, sin(pi "/" 2))}. Section {@NumberOf grsummary} lists all the functions; they include the four -arithmetical operators @Eq { non + }, @Eq { non - }, @Eq { non * }, and -@Eq { "/" }, as well as {@Code "sin"}, {@Code "cos"}, {@Code "sqrt"}, and +arithmetical operators @M { non + }, @M { non - }, @M { non * }, and +@M { "/" }, as well as {@Code "sin"}, {@Code "cos"}, {@Code "sqrt"}, and many others. Braces are used for grouping, never parentheses. @PP For plotting functions there are three looping symbols, {@Code "xloop"}, {@Code "yloop"}, and {@Code "zloop"}. For example, the following plots -the two functions @Eq { y = 2 } and @Eq { y = sqrt { pi x "/" 4 } + 1 } -for @Eq { x } from 10 to 500: +the two functions @M { y = 2 } and @M { y = sqrt { pi x "/" 4 } + 1 } +for @M { x } from 10 to 500: @ID -1px @Break @OneRow @Code @Verbatim { -2p @Font @Graph style { axes } @@ -109,7 +109,7 @@ xloop from { -5 } to { +5 } by { 0.2 } do if cond { abs { x } > 0.1 } then { x 1/x } else {} } } -This plots the function @Eq { y = 1 "/" x }, skipping points near +This plots the function @M { y = 1 "/" x }, skipping points near zero. Actually the @Code "else" part could be omitted since its default value is empty. @PP |