Texas Instruments TI-86 User Manual

Page 407

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Appendix

395

99APPX.DOC TI-86, Appendix, US English Bob Fedorisko Revised: 02/27/01 1:20 PM Printed: 02/27/01 1:26 PM Page 395 of 26

18 ILLEGAL NEST

You attempted to use an invalid function in an argument for

seq(

or a

CALC

function; for example,

der1(der1(x^3,x),x))

19 BOUND

You defined an upper bound that is less than the specified lower bound or a
lower bound that is greater than the specified upper bound.

20 GRAPH
WINDOW

♦

One or more window variable values is incompatible with the others for
defining the graph screen; for example, you defined

xMax

xMin

♦

Window variables are too small or too large to graph correctly; for
example, you attempted to zoom out beyond the calculator’s range.

21 ZOOM

ZOOM

operation resulted in an error; you attempted to define

ZBOX

with a line.

22 LABEL

In programming, the

Goto

instruction label is not defined with a

Lbl

instruction.

23 STAT

♦

You attempted a stat calculation with at least one inappropriate list, such
as a list with less than two data points.

♦

At least one element of a frequency list is < 0.

♦

(

xMax

xMin

)

xScl

63 must be true when plotting a histogram.

24 CONVERSION

When converting measurements, the units are incompatible, as in volts to liters.

25 SOLVER

♦

In the solver editor, the equation does not contain a variable.

♦

You attempted to graph with the cursor positioned on bound.

26 SINGULARITY

In the solver editor, the equation contains a singularity, which is a point at
which the function is not defined.

27 NO SIGN CHNG

The solver did not detect a sign change.

28 ITERATIONS

The solver has exceeded the maximum permitted number of iterations.

29 BAD GUESS

♦

The initial guess was outside the specified bounds.

♦

The initial guess and several points around the guess are undefined.

Errors 26 through 29 occur
during the solving process.
Examine a graph of the
function or a graph of the
variable vs. left

in the

SOLVER

. If the equation has

a solution, change bounds
and

or the initial guess.

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