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.TH function 1 "April 1993" "Scilab Group" "Scilab keyword"
.so ../sci.an
.SH NAME
function - opens a function definition
endfunction - closes a function definition
.SH SYNTAX
.nf
function <lhs_arguments>=<function_name><rhs_arguments>
<statements>
endfunction
.fi
Where
.TP 15
<function_name>
stands for the name of the function
.TP
<rhs_arguments>
stands for the input argument list. It may be
.RS
.TP
-
a comma separated sequence of variable names enclosed in parenthesis, like
\fV(x1,...,xm)\fR. Last variable name can be the key word
\fVvarargin\fR (see varargin)
.TP
-
the sequence \fV()\fR or nothing,if the function has no input
argument.
.RE
.TP
<lhs_arguments>
stands for the output argument list. It may be
.RS
.TP
-
a comma separated sequence of variable names enclosed in brackets, like
\fV[y1,...,yn]\fR. Last variable name can be the key word
\fVvarargout\fR (see varargout)
.TP
-
the sequence \fV[]\fR ,if the function has no input
argument. In this case the syntax may also be: \fVfunction <function_name><rhs_arguments>\fR
.RE
.TP
<statements>
stands for a set of scilab instructions (statements)
.SH DESCRIPTION
This syntax may be used to define function (see functions) inline or
in a script file (see exec). For compatibility with old Scilab versions,
functions defined in a script file containing only function
definitions can be "loaded" into Scilab using the \fVgetf\fR function.
.LP
The \fVfunction <lhs_arguments>=<function_name><rhs_arguments>\fR
sequence cannot be split over several lines. This sequence can be
followed by statements in the same line if a comma of semi column is
added at its end.
.LP
function definitions can be nested
.SH EXAMPLE
.nf
//inline definition (see function)
function [x,y]=myfct(a,b)
x=a+b
y=a-b
endfunction
[x,y]=myfct(3,2)
//a one line function definition
function y=sq(x),y=x^2,endfunction
sq(3)
//nested functions definition
function y=foo(x)
a=sin(x)
function y=sq(x), y=x^2,endfunction
y=sq(a)+1
endfunction
foo(%pi/3)
// definition in an script file (see exec)
exec SCI/macros/elem/asin.sci;
.fi
.SH SEE ALSO
functions, exec, getf
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