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132 Alphabetical Listing
rowSwap()
Catalog >
rowSwap(Matrix1, rIndex1, rIndex2) ⇒
matrix
Returns Matrix1 with rows rIndex1 and
rIndex2 exchanged.
rref()
Catalog >
rref(Matrix1[, Tol]) ⇒ matrix
Returns the reduced row echelon form of
Matrix1.
Optionally, any matrix element is treated as
zero if its absolute value is less than Tol.
This tolerance is used only if the matrix has
floating-point entries and does not contain
any symbolic variables that have not been
assigned a value. Otherwise, Tol is ignored.
• If you use /· or set the Auto or
Approximate mode to Approximate,
computations are done using floating-
point arithmetic.
• If Tol is omitted or not used, the default
tolerance is calculated as:
5E−14 •max(dim(Matrix1)) •rowNorm
(Matrix1)
Note: See also ref(), page 122.
S
sec()
µ key
sec(Value1) ⇒ value
sec(List1) ⇒ list
Returns the secant of Value1 or returns a
list containing the secants of all elements
in List1.
In Degree angle mode:
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