102 Alphabetical Listing
►ln
Catalog >
Expr►ln ⇒ expression
Causes the input Expr to be converted to an
expression containing only natural logs (ln).
Note: You can insert this operator from the
computer keyboard by typing @>ln.
ln()
/u keys
ln(Expr1) ⇒ expression
ln(List1) ⇒ list
Returns the natural logarithm of the
argument.
For a list, returns the natural logarithms of
the elements.
If complex formatmode is Real:
If complex formatmode is Rectangular:
ln(squareMatrix1) ⇒ squareMatrix
Returns the matrix natural logarithm of
squareMatrix1. This is not the same as
calculating the natural logarithm of each
element. For information about the
calculation method, refer to cos() on.
squareMatrix1 must be diagonalizable. The
result always contains floating-point
numbers.
In Radian angle mode and Rectangular
complex format:
To see the entire result, press £ and then
use ¡and¢ to move the cursor.
LnReg
Catalog >
LnReg X, Y[, [Freq] [, Category, Include]]
Computes the logarithmic regression y =
a+b•ln(x) on lists X and Y with frequency
Freq. A summary of results is stored in the
stat.results variable. (See page 172.)
All the lists must have equal dimension
except for Include.
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