Learning Guide Learning Guide

298 • IndexXML, 283ExportMatrix, 274ExportVector, 274expression sequences, 19expression trees, 181expressionsaccessing subexpressions, 39comma delimited, see expressionsequencesconverting, 34converting to functions, 49expanding, 16extracting subexpressions, 39factoring, 16identification of, 179indeterminates of, 184multiple assignments, 20multiple, applying commandsto, 36naming, 17, 51naming multiple, 20number of parts, 38operands of, 179querying contents, 182solving, assumptions, 44substituting, 28types of, 183unevaluated, 15, 197extending by continuity, 228ExternalCalling, 79extracting1-D array elements, 262-D array elements, 27coefficients, 62list items, 24range of subexpressions, 39set items, 45subexpressions, 39Factor, 152factor, 16, 33vs. solve, 62factored normal form, 35, 155factorial, 7factorial, integer, 9factoring, 62, 150–153constants, 40expressions, 16fractions, 33integers, 8modulo p, 152polynomials, 33feasible, 95fieldplot, 133filesreading columns from, 270reading commands from, 272reading data from, 270writing columns to, 273finance, 79findingbasis, 89limits, 64roots, 43, 53–55, 57floating-point accuracy, 11–12floating-point approximations, 11–13maximum length, 11floating-point arithmetic, forcing,12floating-point conversions, 12floating-point errors, 13floating-point numbersdefault accuracy of, 12vs. rational numbers, 8–10frac, 164fractional part function, 15fractionson common denominator, 35denominator, 38denominators of, 178expanded normal form, 36