{{alias}}( N, x, strideX, mask, strideMask ) Computes the range of a double-precision floating-point strided array according to a mask. The `N` and `stride` parameters determine which elements are accessed at runtime. Indexing is relative to the first index. To introduce offsets, use a typed array views. If a `mask` array element is `0`, the corresponding element in `x` is considered valid and included in computation. If a `mask` array element is `1`, the corresponding element in `x` is considered invalid/missing and excluded from computation. If `N <= 0`, the function returns `NaN`. Parameters ---------- N: integer Number of indexed elements. x: Float64Array Input array. strideX: integer Index increment for `x`. mask: Uint8Array Mask array. strideMask: integer Index increment for `mask`. Returns ------- out: number Range. Examples -------- // Standard Usage: > var x = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 4.0, 2.0 ] ); > var mask = new {{alias:@stdlib/array/uint8}}( [ 0, 0, 1, 0 ] ); > {{alias}}( x.length, x, 1, mask, 1 ) 4.0 // Using `N` and `stride` parameters: > x = new {{alias:@stdlib/array/float64}}( [ -2.0, 1.0, 1.0, -5.0, 2.0, -1.0, 4.0 ] ); > mask = new {{alias:@stdlib/array/uint8}}( [ 0, 0, 0, 0, 0, 0, 1 ] ); > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 ); > {{alias}}( N, x, 2, mask, 2 ) 4.0 // Using view offsets: > var x0 = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, 4.0 ] ); > var x1 = new {{alias:@stdlib/array/float64}}( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); > var mask0 = new {{alias:@stdlib/array/uint8}}( [ 0, 0, 0, 0, 0, 0, 1 ] ); > var mask1 = new {{alias:@stdlib/array/uint8}}( mask0.buffer, mask0.BYTES_PER_ELEMENT*1 ); > N = {{alias:@stdlib/math/base/special/floor}}( x0.length / 2 ); > {{alias}}( N, x1, 2, mask1, 2 ) 4.0 {{alias}}.ndarray( N, x, strideX, offsetX, mask, strideMask, offsetMask ) Computes the range of a double-precision floating-point strided array according to a mask and using alternative indexing semantics. While typed array views mandate a view offset based on the underlying buffer, the `offset` parameter supports indexing semantics based on a starting index. Parameters ---------- N: integer Number of indexed elements. x: Float64Array Input array. strideX: integer Index increment for `x`. offsetX: integer Starting index for `x`. mask: Uint8Array Mask array. strideMask: integer Index increment for `mask`. offsetMask: integer Starting index for `mask`. Returns ------- out: number Range. Examples -------- // Standard Usage: > var x = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 2.0, 4.0 ] ); > var mask = new {{alias:@stdlib/array/uint8}}( [ 0, 0, 0, 1 ] ); > {{alias}}.ndarray( x.length, x, 1, 0, mask, 1, 0 ) 4.0 // Using offset parameter: > x = new {{alias:@stdlib/array/float64}}( [ 1.0, -2.0, 3.0, 2.0, 5.0, -1.0, 4.0 ] ); > mask = new {{alias:@stdlib/array/uint8}}( [ 0, 0, 0, 0, 0, 0, 1 ] ); > var N = {{alias:@stdlib/math/base/special/floor}}( x.length / 2 ); > {{alias}}.ndarray( N, x, 2, 1, mask, 2, 1 ) 4.0 See Also --------