FUNCDEF: Difference between revisions
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<code>@f@ FUNCDEF f(x) = 3 x^2 + 2 x + 1</code> tells iMath how to find the value of <code>f</code> for a given value of <code>x</code>. | <code>@f@ FUNCDEF f(x) = 3 x^2 + 2 x + 1</code> tells iMath how to find the value of <code>f</code> for a given value of <code>x</code>. | ||
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== Special notes == | == Special notes == | ||
Revision as of 19:11, 27 June 2017
Syntax
@label@ { options } FUNCDEF * funcname(symbol|exlist) = expression
Implemented in iMath since version 2.2.0 or earlier.
Explanation
Define an equation that can be used to find the value of a user-defined function. The function must first have been declared with FUNCTION.
The starred form will suppress printing of the result.
Example
@f@ FUNCDEF f(x) = 3 x^2 + 2 x + 1 tells iMath how to find the value of f for a given value of x.
See also
Special notes
When you use simplification type expand on a function, it will be replaced by the definition given with FUNCDEF. If you do not want this, simply define the value of your function in a normal equation with EQDEF. Then you can replace your function with its definition by substitution.