Texas Instruments Voyage 200, Руководство пользователя

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838 Appendix A: Functions and Instructions
log()
CATALOG
log( expression1[,expression2] )
⇒
expression
log ( list1[,expression2] )
⇒
list
Returns the base-
expression2
logarithm of the
argument.
For a list, returns the base-
expression2
logarithm of
the elements.
If expression 2 is omitted, 10 is used.
log(2.0)
¸
.301
...
If complex format mode is REAL:
log({
ë
3,1.2,5})
¸
Error: Non-real result
If complex format mode is RECTANGULAR:
log({
ë
3,1.2,5})
¸
{
ln(3)
ln(10) +
p
ln(10)
ø
i
.079 ...
ln(5)
ln(10)
}
log(
squareMatrix1
)
⇒ ⇒ ⇒ ⇒
squareMatrix
Returns the matrix base-
expression2
logarithm of
squareMatrix1
. This is not the same as calculating
the base-
expression2
logarithm of each element.
For information about the calculation method,
refer to
cos()
.
squareMatrix1
must be diagonalizable. The result
always contains floating-point numbers.
In Radian angle mode and Rectangular complex
format mode:
log([1,5,3;4,2,1;6,
ë
2,1])
¸






.795…+.753…
ø
i
.003…
ì
.647…
ø
i
…
.194…
ì
.315…
ø
i
.462…+.270
ø
i
…
ë
.115…
ì
.904…
ø
i
.488…+.777…
ø
i
…
log(
x,b
)
⇒ ⇒ ⇒ ⇒
expression
log(
squareMatrix1
)
⇒ ⇒ ⇒ ⇒
squareMatrix
In a list, returns the base-
expression2
logarithm of the
elements.
Log(10,3) – log(5,3)
¸
Log
3
(2)
Log(2.0,4)
¸
.5
4444
logbase
MATH/String menu
expression
4444
logbase( expression1 )
⇒
⇒ ⇒
⇒
expression
Causes the input expression to be
simplified to an expression using base
expression1.
Log(10,3) – log(5,5)
4
logbase(5)
¸
) 3 ( log
) 30 ( log
5
5