{smcl}
{* 25jun2007}{...}
{cmd:help mata add()}
{cmd:help mata subtract()}
{cmd:help mata product()}
{cmd:help mata divide()}{right:(SJ7-4: pr0034)}
{hline}
{* index rpn binary operators mata}{...}
{* index add()}{...}
{* index subtract()}{...}
{* index product()}{...}
{* index divide()}{...}

{title:Title}

{p 4 4 2} {bf:Fundamental arithmetic operations for use with rpnfcn()}


{title:Syntax}

{p 16 12 2}
{bf:{ul:Command name}}{space 5} {ul:Argument}

{p 16 12 2}
{cmd:&add()}{space 11} NULL

{p 16 12 2}
{cmd:&subtract()}{space 6} NULL

{p 16 12 2}
{cmd:&product()}{space 7} NULL

{p 16 12 2}
{cmd:&divide()}{space 8} NULL


{title:Description}

{p 4 4 2} These functions perform the four fundamental arithmetic
operations on the two top elements of the stack. They remove the top
element and replace the upper element with the result of the
operation; i.e., the number of elements in the stack are reduced by one
and the result is the new top element. All four perform their
operations elementwise without checking for conformability as they
rely on the Mata colon operators {cmd::+}, {cmd::-+}, {cmd::*}, and
{cmd::/}, see {helpb m2_op_colon:[M-2] op_colon}.
{cmd:&subtract()} subtracts the current top element of the stack
element from the element just below, and {cmd:&divide()} divides the
upper element of the stack with the top element.


{title:Source code}

{p 4 4 2}
{view rpnbinop.mata, adopath asis:rpnbinop.mata}


{title:Author}

{p 4 4 2}{browse "http://www.almen.dk/hstovring":Henrik Støvring},
Research Unit of General Practice, University of Southern Denmark.
Please email
{browse "mailto:hstovring@health.sdu.dk":hstovring@health.sdu.dk}
if you have comments or questions or observe any problems.


{title:Also see}

{p 4 13 2}
Manual:  {hi:[M-0] mata}

{p 4 13 2}
Online:  
{bf:{help mata:[M-0] mata}},
{bf:{help mf_rpnfcn}},
{bf:{help mf_rpnbinop}}, 
{bf:{help mf_rpndist}},
{bf:{help mf_rpnint}}
{p_end}