HP Prime Graphing NW280AAABA manual Lname Returns a list of the variables in an expression

list2mat Returns a matrix of n columns made by splitting a list into rows, each containing n terms. If the number of elements in the list is not divisible by n, then the matrix is completed with zeros.

list2mat(List, Integer)

Example:

list2mat({1,8,4,9},1) returns

1

8

4

9

lname Returns a list of the variables in an expression.

lname(Expr)

Example:

lname(exp(x)*2*sin(y)) gives [x,y]

lnexpand Returns the expanded form of a logarithmic expression.

lnexpand(Expr)

Example:

lnexpand(ln(3*x)) gives ln(3)+ln(x)

logarithmic_ Given a set of points, returns a vector containing the regression coefficients a and b of y=a*ln(x)+b, the natural logarithmic

function which best fits the set of points. The points may be the elements in two lists or the rows of a matrix.

logarithmic_regression(Matrix) or logarithmic_regression(List1, List2)

Example:

logarithmic_regression

1.0 1.0

2.04.0 returns

3.09.0

4.0 9.0

[6.3299…, 0.7207…]

logb Returns the logarithm of base b of a.

logb(a,b)

Example:

logb(5,2) gives ln(5)/ln(2) which is approximately 2.32192809489

Functions and commands 399