fix: implementation

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---

Author: gururaj1512

lib/node_modules/@stdlib/stats/base/nanmax-by/lib/accessors.js

@@ -27,11 +27,13 @@ var isPositiveZero = require( '@stdlib/math/base/assert/is-positive-zero' );
 // MAIN //
 
 /**
-* Calculates the maximum value of a strided array via a callback function, ignoring `NaN` values.
+* Computes the maximum value of a strided array via a callback function, ignoring `NaN` values.
 *
 * @param {PositiveInteger} N - number of indexed elements
-* @param {Collection} x - input array/collection
-* @param {integer} strideX - index increment
+* @param {Object} x - input array object
+* @param {Collection} x.data - input array data
+* @param {Array<Function>} x.accessors - array element accessors
+* @param {integer} strideX - stride length
 * @param {NonNegativeInteger} offsetX - starting index
 * @param {Callback} clbk - callback
 * @param {*} [thisArg] - execution context
@@ -63,11 +65,12 @@ function nanmaxBy( N, x, strideX, offsetX, clbk, thisArg ) {
 
 	// Cache a reference to the element accessor:
 	get = x.accessors[0];
+
 	if ( N <= 0 ) {
 		return NaN;
 	}
 	if ( N === 1 || strideX === 0 ) {
-		v = clbk.call( thisArg, get( xbuf, 0 ), 0, 0, x );
+		v = clbk.call( thisArg, get( xbuf, 0 ), 0, offsetX, x );
 		if ( v === void 0 || isnan( v ) ) {
 			return NaN;
 		}

lib/node_modules/@stdlib/stats/base/nanmax-by/lib/index.js

@@ -19,7 +19,7 @@
 'use strict';
 
 /**
-* Calculate the maximum value of a strided array via a callback function and ignoring `NaN` values.
+* Compute the maximum value of a strided array via a callback function and ignoring `NaN` values.
 *
 * @module @stdlib/stats/base/nanmax-by
 *
@@ -50,7 +50,14 @@
 
 // MODULES //
 
+var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
 var main = require( './main.js' );
+var ndarray = require( './ndarray.js' );
+
+
+// MAIN //
+
+setReadOnly( main, 'ndarray', ndarray );
 
 
 // EXPORTS //

lib/node_modules/@stdlib/stats/base/nanmax-by/lib/main.js

@@ -20,14 +20,35 @@
 
 // MODULES //
 
-var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
-var nanmaxBy = require( './nanmax_by.js' );
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
 var ndarray = require( './ndarray.js' );
 
 
 // MAIN //
 
-setReadOnly( nanmaxBy, 'ndarray', ndarray );
+/**
+* Computes the maximum value of a strided array via a callback function, ignoring `NaN` values.
+*
+* @param {PositiveInteger} N - number of indexed elements
+* @param {Collection} x - input array/collection
+* @param {integer} strideX - index increment
+* @param {Callback} clbk - callback
+* @param {*} [thisArg] - execution context
+* @returns {number} maximum value
+*
+* @example
+* var x = [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ];
+*
+* function accessor( v ) {
+*     return v * 2.0;
+* }
+*
+* var v = nanmaxBy( x.length, x, 1, accessor );
+* // returns 8.0
+*/
+function nanmaxBy( N, x, strideX, clbk, thisArg ) {
+	return ndarray( N, x, strideX, stride2offset( N, strideX ), clbk, thisArg );
+}
 
 
 // EXPORTS //

lib/node_modules/@stdlib/stats/base/nanmax-by/lib/nanmax_by.js

@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2020 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -29,7 +29,7 @@ var accessors = require( './accessors.js' );
 // MAIN //
 
 /**
-* Calculates the maximum value of a strided array via a callback function, ignoring `NaN` values.
+* Computes the maximum value of a strided array via a callback function, ignoring `NaN` values.
 *
 * @param {PositiveInteger} N - number of indexed elements
 * @param {Collection} x - input array/collection
@@ -64,7 +64,7 @@ function nanmaxBy( N, x, strideX, offsetX, clbk, thisArg ) {
 		return accessors( N, o, strideX, offsetX, clbk, thisArg );
 	}
 	if ( N === 1 || strideX === 0 ) {
-		v = clbk.call( thisArg, x[ 0 ], 0, 0, x );
+		v = clbk.call( thisArg, x[ offsetX ], 0, offsetX, x );
 		if ( v === void 0 ) {
 			return NaN;
 		}