Reference: Difference between revisions
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* <code>CLEAREQUATIONS</code> | * <code>CLEAREQUATIONS</code> | ||
iMath stores all equations and functions that it encounters. If you want to make a fresh start in your document, use this command | iMath stores all equations and functions that it encounters. If you want to make a fresh start in your document, use this command | ||
* <code>FUNCTION { hints, symbol, expression } | * <code>FUNCTION { hints, symbol, expression }</code> | ||
Declare a user-defined function. <code>symbol</code> is the name of the function. The expression declares the arguments of the function and can be either a single symbol or a list of symbols. The way that iMath treats this function can be influenced by function hints: | Declare a user-defined function. <code>symbol</code> is the name of the function. The expression declares the arguments of the function and can be either a single symbol or a list of symbols. The way that iMath treats this function can be influenced by function hints: | ||
** none: No function hints (must be used because iMath requires three arguments to the <code>FUNCTION</code> declaration | ** none: No function hints (must be used because iMath requires three arguments to the <code>FUNCTION</code> declaration |
Revision as of 18:35, 17 March 2011
It is recommended to always use the iMath menus to create or modify iFormulas. Nevertheless, sometimes it will be necessary to fine-tune equations by editing them directly.
All iMath commands start with the string %%ii
at the beginning of a line, which will be interpreted as a comment by Openoffice. When the document is recalculated, iMath parses the string and generates the formula that is displayed. The generated lines are marked by %%gg
at the end of the line. Editing such a line makes no sense because it will be deleted at the next recalculation! Always modify the %%ii
lines if you want to tweak an iFormula. Formulas may also have lines without either %%ii
or %%gg
, these will not be touched by iMath.
Elements
The following elements can be part of an iFormula definition string
symbol
The name of a mathematical symbol or function, e.g. x
or a_n
expression
A mathematical expression in Openoffice math format
list = { element; element; ... }
A list of other elements, enclosed in parentheses and separated by semicolons
Commands
After the initial %%ii
, the following commands are possible:
READFILE { "path/to/file" }
Open the given file and parse the iMath commands in this file. This command can be used to put common formulas in a file to re-use them. At the moment, the path is operation-system dependent, not a Openoffice URL!
CLEAREQUATIONS
iMath stores all equations and functions that it encounters. If you want to make a fresh start in your document, use this command
FUNCTION { hints, symbol, expression }
Declare a user-defined function. symbol
is the name of the function. The expression declares the arguments of the function and can be either a single symbol or a list of symbols. The way that iMath treats this function can be influenced by function hints:
- none: No function hints (must be used because iMath requires three arguments to the
FUNCTION
declaration - lib: A library function: It will not be affected by
CLEAREQUATIONS
- trig: For trigonometric functions. Tells iMath that this function will get special treatment when printing (e.g. <math>sin^2 x</math> instead of <math>(sin x)^2</math>)
- expand: The function is to be expanded immediately. Useful for functions that are really abbreviations, e.g.
square(x)
will be expanded to <math>x^2</math> - nobracket: The function does not require brackets around the argument (e.g.
sqrt(x)
is printed as <math>root x</math>) - defdiff: Differentiate the definition of the function, not the function itself
- none: No function hints (must be used because iMath requires three arguments to the