HP Prime Graphing Wireless Calculator - Manual (Page 212)

208 Functions and commands
spline Given two lists or vectors (one for the x-values and one for the
y-values), as well as a variable and an integer degree, returns
the natural spline through the points given by the two lists. The
polynomials in the spline are in terms of the given variable and
are of the given degree.
spline(ListX, ListY, Var, Integer) or
spline(VectorX, VectorY, Var, Integer)
Example:
spline({0,1,2},{1,3,0},x,3) returns
sqrt Returns the square root of an expression.
sqrt(Expr)
Example:
sqrt(50)
gives
5*sqrt(2)
stddev Returns the standard deviation of the elements of a list or a list
of the standard deviations of the columns of a matrix. The
optional second list is a list of weights.
stddev(List1, [List2]) or
stddev(Vector1, [Vector2]) or stddev(Matrix)
Example:
stddev({1,2,3})
returns
stddevp Returns the population standard deviation of the elements of a list
or a list of the population standard deviations of the columns of a
matrix. The optional second list is a list of weights.
stddevp(List1, [List2]) or
stddevp(Vector1, [Vector2]) or
stddevp(Matrix)
Example:
stddevp({1,2,3})
gives
1
sto Stores a real or string in a variable.
sto((Real or Str),Var)
sturmseq Returns the Sturm sequence for a polynomial or a rational
fraction.
sturmseq(Poly,[Var])
5 –
4
------ x
3
⋅
13
4
------- x ⋅ 1 5
4
--- x 1 – ( )
3
⋅
15 –
4
---------- x 1 – ( )
2 1
2
--- x 1 – ( ) ⋅ – 3 + ⋅ + + +
6
3
-------