{{alias}}( N, alpha, x, strideX, y, strideY ) Multiplies a vector `x` by a constant `alpha` and adds the result to `y`. The `N` and `stride` parameters determine which elements in `x` and `y` are accessed at runtime. Indexing is relative to the first index. To introduce an offset, use typed array views. If `N <= 0` or `alpha == 0`, the function returns `y` unchanged. Parameters ---------- N: integer Number of indexed elements. alpha: number Constant. x: Float32Array Input array. strideX: integer Index increment for `x`. y: Float32Array Destination array. strideY: integer Index increment for `y`. Returns ------- y: Float32Array Input array `y`. Examples -------- // Standard usage: > var x = new {{alias:@stdlib/array/float32}}( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] ); > var y = new {{alias:@stdlib/array/float32}}( [ 1.0, 1.0, 1.0, 1.0, 1.0 ] ); > var alpha = 5.0; > {{alias}}( x.length, alpha, x, 1, y, 1 ) [ 6.0, 11.0, 16.0, 21.0, 26.0 ] // Using `N` and `stride` parameters: > x = new {{alias:@stdlib/array/float32}}( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ); > y = new {{alias:@stdlib/array/float32}}( [ 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 ] ); > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 ); > {{alias}}( N, alpha, x, 2, y, -1 ) [ 26.0, 16.0, 6.0, 1.0, 1.0, 1.0 ] // Using view offsets: > var x0 = new {{alias:@stdlib/array/float32}}( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ); > var y0 = new {{alias:@stdlib/array/float32}}( [ 7.0, 8.0, 9.0, 10.0, 11.0, 12.0 ] ); > var x1 = new {{alias:@stdlib/array/float32}}( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); > var y1 = new {{alias:@stdlib/array/float32}}( y0.buffer, y0.BYTES_PER_ELEMENT*3 ); > N = {{alias:@stdlib/math/base/special/floor}}( x0.length / 2 ); > {{alias}}( N, 5.0, x1, -2, y1, 1 ) [ 40.0, 31.0, 22.0 ] > y0 [ 7.0, 8.0, 9.0, 40.0, 31.0, 22.0 ] {{alias}}.ndarray( N, alpha, x, strideX, offsetX, y, strideY, offsetY ) Multiplies a vector `x` by a constant `alpha` and adds the result to `y`, using alternative indexing semantics. While typed array views mandate a view offset based on the underlying buffer, the `offsetX` and `offsetY` parameters support indexing semantics based on starting indices. Parameters ---------- N: integer Number of indexed elements. alpha: number Constant. x: Float32Array Input array. strideX: integer Index increment for `x`. offsetX: integer Starting index for `x`. y: Float32Array Destination array. strideY: integer Index increment for `y`. offsetY: integer Starting index for `y`. Returns ------- y: Float32Array Input array `y`. Examples -------- // Standard usage: > var x = new {{alias:@stdlib/array/float32}}( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] ); > var y = new {{alias:@stdlib/array/float32}}( [ 1.0, 1.0, 1.0, 1.0, 1.0 ] ); > var alpha = 5.0; > {{alias}}.ndarray( x.length, alpha, x, 1, 0, y, 1, 0 ) [ 6.0, 11.0, 16.0, 21.0, 26.0 ] // Advanced indexing: > x = new {{alias:@stdlib/array/float32}}( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ); > y = new {{alias:@stdlib/array/float32}}( [ 7.0, 8.0, 9.0, 10.0, 11.0, 12.0 ] ); > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 ); > {{alias}}.ndarray( N, alpha, x, 2, 1, y, -1, y.length-1 ) [ 7.0, 8.0, 9.0, 40.0, 31.0, 22.0 ] See Also --------