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NAG[f16ecc] NAG[nag_daxpby] - Multiply real vector by scalar, preserving input vector
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Calling Sequence
f16ecc(n, alpha, x, incx, beta, y, incy, 'fail'=fail)
nag_daxpby(. . .)
Parameters
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n - integer;
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Constraint:  . .
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alpha - float;
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On entry: the scalar  .
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x - Vector(1..dim, datatype=float[8]);
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Note: the dimension, dim, of the array x must be at least  .
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On entry: the vector  .
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incx - integer;
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On entry: the increment in the subscripts of x between successive elements of  .
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Constraint:  . .
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beta - float;
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On entry: the scalar  .
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y - Vector(1..dim, datatype=float[8]);
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Note: the dimension, dim, of the array y must be at least  .
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On entry: the vector  .
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On exit: the updated vector  .
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incy - integer;
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On entry: the increment in the subscripts of y between successive elements of  .
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Constraint:  . .
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'fail'=fail - table; (optional)
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The NAG error argument, see the documentation for NagError.
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Description
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Purpose
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nag_daxpby (f16ecc) performs the operation
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Error Indicators and Warnings
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"NE_BAD_PARAM"
On entry, argument  had an illegal value.
"NE_INT"
On entry,  . Constraint:  .
On entry,  . Constraint:  .
On entry,  . Constraint:  .
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Accuracy
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The BLAS standard requires accurate implementations which avoid unnecessary over/underflow (see Section 2.7 of The BLAS Technical Forum Standard (2001)).
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Examples
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>
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n := 5:
alpha := 2.0:
beta := 3.0:
incx := 1:
incy := 1:
x := Vector([1,2,3,4,5], datatype=float[8]):
y := Vector([1,2,3,4,5], datatype=float[8]):
NAG:-f16ecc(n, alpha, x, incx, beta, y, incy):
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