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<H1><A NAME="SECTION00400000000000000000">MATC Function Statement</A></H1>
<P>
The syntax of the function definition is given below.
<P>
<PRE>function name(arg1,arg2,...)
!
! Optional function description (seen with help("name"))
!
import var1,var2
export var3,var4
{
expr;
...
expr;
_name = value
}</PRE>
<P>
Functions have their own list of variables. Global variables are not seen
in this function unless imported by import or given as arguments. Local
variables can be made global by the export statement.
<P>
Functions, if returing matrices, behave in many ways as variables do. So if
you have defined function mult as follows
<P>
<PRE>function mult(a,b)
{
_mult = a*b;
}</PRE>
<P>
you can get element (3,5) of the a times b matrix by the following statement
<P>
<PRE>mult(x,y)[3,5]</PRE>
<P>
or diagonal values of the same matrix by
<P>
<PRE>diag(mult(x,y)).</PRE>
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<BR> <HR>
<P><ADDRESS>
<I>Juha Ruokolainen <BR>
Fri Feb 14 15:59:30 EET 1997</I>
</ADDRESS>
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