Texas Instruments TI-84 PLUS SILV Guidebook - Page 404

Error Type RESERVED SINGULAR MAT SINGULARITY STAT STAT PLOT SYNTAX TOL NOT MET UNDEFINED VALIDATION VARIABLE VERSION Possible Causes and Suggested Remedies You attempted to use a system variable inappropriately. See Appendix A. • A singular matrix (determinant = 0) is not valid as the argument for L1. • The SinReg instruction or a polynomial regression generated a singular matrix (determinant = 0) because it could not find a solution, or a solution does not exist. This error is not returned during graphing. The TI-84 Plus allows for undefined values on a graph. expression in the solve( function or the equation solver contains a singularity (a point at which the function is not defined). Examine a graph of the function. If the equation has a solution, change the bounds or the initial guess or both. You attempted a stat calculation with lists that are not appropriate. • Statistical analyses must have at least two data points. • Med-Med must have at least three points in each partition. • When you use a frequency list, its elements must be , 0. • (Xmax N Xmin) à Xscl must be, 47 for a histogram. You attempted to display a graph when a stat plot that uses an undefined list is turned on. The command contains a syntax error. Look for misplaced functions, arguments, parentheses, or commas. Appendix A displays the arguments and punctuation needed to execute the function or instruction. For example, stdDev(list[,freqlist]) is a function of the TI-84 Plus. The arguments are shown in italics. The arguments in brackets are optional and you need not type them. You must also be sure to separate multiple arguments with a comma (,). For example stdDev(list[,freqlist]) might be entered as stdDev(L1) or stdDev(L1,L2) since the frequency list or freqlist is optional. You requested a tolerance to which the algorithm cannot return an accurate result. You referenced a variable that is not currently defined. For example, you referenced a stat variable when there is no current calculation because a list has been edited, or you referenced a variable when the variable is not valid for the current calculation, such as a after Med-Med. Electrical interference caused a link to fail or this graphing calculator is not authorized to run the application. You have tried to archive a variable that cannot be archived or you have tried to unarchive an application or group. Examples of variables that cannot be archived include: • Real numbers LRESID, R, T, X, Y, Theta, Statistic variables under Vars, STATISTICS menu, Yvars, and the AppIdList. You have attempted to receive an incompatible variable version from another graphing calculator. Appendix B: Reference Information 397