help mata add()
help mata subtract()
help mata product()
help mata divide()
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Title

    Fundamental arithmetic operations for use with rpnfcn()


Syntax

                Command name      Argument

                &add()            NULL

                &subtract()       NULL

                &product()        NULL

                &divide()         NULL


Description

    These functions perform the four fundamental arithmetic operations on the
    two top elements of the stack. They remove the top element and replaces
    the upper but one 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 element-wise without
    checking for conformability as they rely on the Mata colon operators :+,
    :-+, :*, and :/, see Mata colon operators.  &subtract() subtracts the
    current top element of the stack element from the element just below,
    &divide() divides the upper but one element of the stack with the top
    element.


Source code

    rpnbinop.mata

Author

    Henrik Støvring, Research Unit of General Practice, University of
    Southern Denmark.  Please email hstovring@health.sdu.dk if you have
    comments, questions or observe any problems.


Also see

    Manual:  [M] Mata Reference Manual

    Online:  help for [M-0] mata,  Evaluation of algorithm matrix using RPN,
             RPN stack manipulation functions, RPN distribution functions,
             RPN functions for integration