repl.txt (2578B)
1 2 {{alias}}( N, x, stride ) 3 Computes the arithmetic mean of a single-precision floating-point strided 4 array using a one-pass trial mean algorithm with pairwise summation. 5 6 The `N` and `stride` parameters determine which elements in `x` are accessed 7 at runtime. 8 9 Indexing is relative to the first index. To introduce an offset, use a typed 10 array view. 11 12 If `N <= 0`, the function returns `NaN`. 13 14 Parameters 15 ---------- 16 N: integer 17 Number of indexed elements. 18 19 x: Float32Array 20 Input array. 21 22 stride: integer 23 Index increment. 24 25 Returns 26 ------- 27 out: number 28 The arithmetic mean. 29 30 Examples 31 -------- 32 // Standard Usage: 33 > var x = new {{alias:@stdlib/array/float32}}( [ 1.0, -2.0, 2.0 ] ); 34 > {{alias}}( x.length, x, 1 ) 35 ~0.3333 36 37 // Using `N` and `stride` parameters: 38 > x = new {{alias:@stdlib/array/float32}}( [ -2.0, 1.0, 1.0, -5.0, 2.0, -1.0 ] ); 39 > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 ); 40 > var stride = 2; 41 > {{alias}}( N, x, stride ) 42 ~0.3333 43 44 // Using view offsets: 45 > var x0 = new {{alias:@stdlib/array/float32}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0 ] ); 46 > var x1 = new {{alias:@stdlib/array/float32}}( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); 47 > N = {{alias:@stdlib/math/base/special/floor}}( x0.length / 2 ); 48 > stride = 2; 49 > {{alias}}( N, x1, stride ) 50 ~-0.3333 51 52 {{alias}}.ndarray( N, x, stride, offset ) 53 Computes the arithmetic mean of a single-precision floating-point strided 54 array using a one-pass trial mean algorithm with pairwise summation and 55 alternative indexing semantics. 56 57 While typed array views mandate a view offset based on the underlying 58 buffer, the `offset` parameter supports indexing semantics based on a 59 starting index. 60 61 Parameters 62 ---------- 63 N: integer 64 Number of indexed elements. 65 66 x: Float32Array 67 Input array. 68 69 stride: integer 70 Index increment. 71 72 offset: integer 73 Starting index. 74 75 Returns 76 ------- 77 out: number 78 The arithmetic mean. 79 80 Examples 81 -------- 82 // Standard Usage: 83 > var x = new {{alias:@stdlib/array/float32}}( [ 1.0, -2.0, 2.0 ] ); 84 > {{alias}}.ndarray( x.length, x, 1, 0 ) 85 ~0.3333 86 87 // Using offset parameter: 88 > var x = new {{alias:@stdlib/array/float32}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0 ] ); 89 > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 ); 90 > {{alias}}.ndarray( N, x, 2, 1 ) 91 ~-0.3333 92 93 See Also 94 -------- 95