Operation Manual

Appendix A: Functions and Instructions 370
Tan gent(
expression,
value[,color#,linestyle#])
Draws a line tangent to expression at X=value with
specified color #: 10-24 and line style
linestyle #: 1-2.
y <
DRAW
5:Tangent(
tanh(
value)
Returns hyperbolic tangent of a real number,
expression, or list.
y N
tanh(
tanh
L1
(value)
Returns the hyperbolic arctangent of a real number,
expression, or list.
y N
tanh
L1
(
tcdf(
lowerbound,
upperbound,df)
Computes the Student-t distribution probability
between lowerbound and upperbound for the specified
degrees of freedom
df.
y =
DISTR
6:tcdf(
Tex t(
row,column,text1,
text2,...,text n)
Writes text on graph beginning at pixel (row,column),
where 0  row  164 and 0  column  264.
Full mode, row must be <=148; column must be 256
Horiz mode, row must be row<=66 and column must
be <=256
G-T mode, row must be row <=126; column must be
176
y <
DRAW
0:Text(
Tex tColor
[color#]
Set text color prior to using the Text( command.
Color #: 10-24.
† y <
DRAW
A:TextColor(
Then
See If:Then
Thick Resets all Y=editor line-style settings to Thick. † z T
Thick
Thin Resets all Y=editor line-style settings to Thin. † z T
Thin
Time
Sets sequence graphs to plot with respect to time. † y .
Time
timeCnv(
seconds)
Converts seconds to units of time that can be more
easily understood for evaluation. The list is in
{days,hours,minutes,seconds}
format.
y N
timeCnv
TInterval
[listname,
freqlist,confidence level]
(Data list input)
Computes a
t confidence interval.
† …
TESTS
8:TInterval
TInterval
v,Sx,n
[,confidence level]
(Summary stats input)
Computes a
t confidence interval.
† …
TESTS
8:TInterval
tpdf(
x,df)
Computes the probability density function (pdf) for
the Student-
t distribution at a specified x value with
specified degrees of freedom
df.
y =
DISTR
5:tpdf(
Trace
Displays the graph and enters TRACE mode. r
F
unction or
Instruction/Arguments
Result
Key or
Keys/Menu or
Screen/Item