<html> <head> <title>Gri: tertiary operators</title> </head> <body bgcolor="#FFFFFF" text="#000000" link="#0000EE" vlink="#551A8B" alink="FF0000"> <!-- newfile TertiaryOperators.html "Gri: tertiary operators" "Programming Gri" --> <!-- @node Tertiary Operators, Binary Operators, Rpn Function, rpn Mathematics --> <a name="TertiaryOperators" ></a> <img src="./resources/top_banner.gif" usemap="#navigate_top" border="0"> <table summary="top banner" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="150" valign="top"> <font size=-1> <br> Chapters: </br> <a href="Introduction.html">1: Introduction</a><br> <a href="SimpleExample.html">2: Simple example</a><br> <a href="InvokingGri.html">3: Invocation</a><br> <a href="GettingMoreControl.html">4: Finer Control</a><br> <a href="X-Y.html">5: X-Y Plots</a><br> <a href="ContourPlots.html">6: Contour Plots</a><br> <a href="Images.html">7: Image Plots</a><br> <a href="Examples.html">8: Examples</a><br> <a href="Commands.html">9: Gri Commands</a><br> <a href="Programming.html">10: Programming</a><br> <a href="Environment.html">11: Environment</a><br> <a href="Emacs.html">12: Emacs Mode</a><br> <a href="History.html">13: History</a><br> <a href="Installation.html">14: Installation</a><br> <a href="Bugs.html">15: Gri Bugs</a><br> <a href="TestSuite.html">16: Test Suite</a><br> <a href="Acknowledgments.html">17: Acknowledgments</a><br> <a href="License.html">18: License</a><br> <br> Indices:</br> <a href="ConceptIndex.html"><i>Concepts</i></a><br> <a href="CommandIndex.html"><i>Commands</i></a><br> <a href="BuiltinIndex.html"><i>Variables</i></a><br> </font> <td width="500" valign="top"> <map name="navigate_top"> <area alt="index.html#Top" shape="rect" coords="5,2,218,24" href="index.html#Top"> <area alt="ReversePolishMath.html#rpnMathematics" shape="rect" coords="516,2,532,24" href="ReversePolishMath.html#rpnMathematics"> <area alt="Gri: RPN function" shape="rect" coords="557,2,573,24" href="RpnFunction.html"> <area alt="Gri: RPN binary operators" shape="rect" coords="581,2,599,24" href="BinaryOperators.html"> </map> <map name="navigate_bottom"> <area alt="index.html#Top" shape="rect" coords="5,2,218,24" href="index.html#Top"> <area alt="Gri: RPN binary operators" shape="rect" coords="581,2,599,24" href="BinaryOperators.html"></map> <h3>10.9.3: Tertiary Rpn Operators</h3> <dl> <dt> <tt>{rpn 0 4 "hello" substr }</tt> <dd>Extract 4 characters from the indicated string, starting at character number 0 (i.e. the start of the string). In other words, replace the three items on the top of the stack with the single item `<font color="#82140F"><code>\"hell\"</code></font>'. </dl> </table> <img src="./resources/bottom_banner.gif" usemap="#navigate_bottom" border="0"> </body> </html>