Texas Instruments TI-86 User Manual
Page 407
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
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
A
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
N
xMin
)
à
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
N
rt
in the
SOLVER
. If the equation has
a solution, change bounds
and
à
or the initial guess.