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ndarray-blas-level1

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Readme

ndarray-blas-level1

BLAS Level 1 operations for ndarrays

Usage

This library implements the basic vector operations of the Level 1 Basic Linear Algebra Subprograms (BLAS). Many of these functions are also implemented in ndarray-ops—which also has functions that are not included in BLAS. So the right answer is probably some blend of the two. This library exists mainly to frame things in a relatively standard, coherent framework.

NB: This library performs no checks to ensure you're only passing one-dimensional vectors. That's either a bug or a feature, depending on how you think about it.

Function	Operation	Description
`swap(x,y)`		Swap the elements of x and y
`scal(alpha,x)`		Multiple vector x by scalar alpha
`copy(x,y)`		Copy x into y
`axpy(alpha, x, y)`		Multiple x by alpha and add it to y
`cpsc(alpha, x, y)`		Multiply x by alpha and assign it to y
`dot(x,y)`		Calculate the inner product of x and y.
`nrm2(x)`		Calculate the 2-norm of x
`asum(x)`		Calculate the 1-norm of x
`iamax(x)`		Not yet implemented

Example

Usage should be pretty straightforward. There aren't really any options or variations.

var blas1 = require('ndarray-blas-level1');

var x = ndarray([1,2,3]);
var y = ndarray([3,4,5]);

blas1.axpy( 2, x, y );