Appendix B: Reference Information 653
SINGULAR MAT • 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.
SINGULARITY 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.
STAT 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.
•(
XmaxNXmin)àXscl must be‚47 for a
histogram.
STAT PLOT You attempted to display a graph when a stat plot that
uses an undefined list is turned on.
Error Type Possible Causes and Suggested Remedies