HP Prime Graphing Calculator - Manual (Page 402)

398 Functions and commands
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(Lst(l),Intg(n))
Example:
list2mat([1,8,4,9],1)
gives
[[1],[8],[4],[9]]
LN Returns the natural logarithm of an expression.
ln(Expr)
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)
LOCAL Used in programming to define local variables.
LOCAL var1,var2,…varn
locus locus(M,A) draws the locus of M.
locus(d,A) draws the envelope of d.
A:=element(C) (C is a curve).
locus(Pnt,Elem)
LOG Returns the natural logarithm of an expression.
LOG(Expr)
log10 Returns the log base 10 of an expression.
log10(Expr)
Example:
log10(10)
gives
1