feat: add support for accessor arrays and refactor stats/base/stdevyc

Author: Hecker165

lib/node_modules/@stdlib/stats/base/stdevyc/lib/stdevyc.js

@@ -48,17 +48,17 @@ var varianceyc = require( '@stdlib/stats/base/varianceyc' ).ndarray;
 * var v = stdevyc( x.length, 1, x, 1, 0 );
 * // returns ~2.0817
 */
-function stdevyc( N, correction, x, strideX, offsetX ) {
-	var o;
+function stdevyc( N, correction, x, strideX ) {
+    var o;
 
-	if ( N <= 0 ) {
-		return NaN;
-	}
-	o = arraylike2object( x );
-	if ( o.accessorProtocol ) {
-		return accessors( N, correction, o, strideX, offsetX );
-	}
-	return sqrt( varianceyc( N, correction, x, strideX, offsetX ) );
+    if ( N <= 0 ) {
+        return NaN;
+    }
+    o = arraylike2object( x );
+    if ( o.accessorProtocol ) {
+        return accessors( N, correction, o, strideX, 0 );
+    }
+    return sqrt( varianceyc( N, correction, x, strideX ) );
 }
 
 

lib/node_modules/@stdlib/stats/base/stdevyc/test/test.stdevyc.js

@@ -21,7 +21,6 @@
 // MODULES //
 
 var tape = require( 'tape' );
-var floor = require( '@stdlib/math/base/special/floor' );
 var sqrt = require( '@stdlib/math/base/special/sqrt' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var Float64Array = require( '@stdlib/array/float64' );
@@ -122,7 +121,6 @@ tape( 'if provided a `correction` parameter yielding `N-correction` less than or
 });
 
 tape( 'the function supports a `stride` parameter', function test( t ) {
-	var N;
 	var x;
 	var v;
 
@@ -137,15 +135,13 @@ tape( 'the function supports a `stride` parameter', function test( t ) {
 		2.0
 	];
 
-	N = floor( x.length / 2 );
-	v = stdevyc( N, 1, x, 2 );
+	v = stdevyc( 4, 1, x, 2 );
 
 	t.strictEqual( v, 2.5, 'returns expected value' );
 	t.end();
 });
 
 tape( 'the function supports a negative `stride` parameter', function test( t ) {
-	var N;
 	var x;
 	var v;
 
@@ -160,8 +156,7 @@ tape( 'the function supports a negative `stride` parameter', function test( t )
 		2.0
 	];
 
-	N = floor( x.length / 2 );
-	v = stdevyc( N, 1, x, -2 );
+	v = stdevyc( 4, 1, x, -2 );
 
 	t.strictEqual( v, 2.5, 'returns expected value' );
 	t.end();
@@ -182,7 +177,6 @@ tape( 'if provided a `stride` parameter equal to `0`, the function returns `0`',
 tape( 'the function supports view offsets', function test( t ) {
 	var x0;
 	var x1;
-	var N;
 	var v;
 
 	x0 = new Float64Array([
@@ -198,9 +192,8 @@ tape( 'the function supports view offsets', function test( t ) {
 	]);
 
 	x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element
-	N = floor(x1.length / 2);
 
-	v = stdevyc( N, 1, x1, 2 );
+	v = stdevyc( 4, 1, x1, 2 );
 	t.strictEqual( v, 2.5, 'returns expected value' );
 
 	t.end();