text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2018 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.
  * You may obtain a copy of the License at
  *
  *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  
  'use strict';
  
  // MODULES //
  
  var isPositive = require( '@stdlib/assert/is-positive-number' ).isPrimitive;
  var copy = require( '@stdlib/utils/copy' );
  var RandomStream = require( './main.js' );
  
  
  // MAIN //
  
  /**
  * Returns a function for creating readable streams which generate pseudorandom numbers drawn from a chi distribution.
  *
  * @param {PositiveNumber} [k] - degrees of freedom
  * @param {Options} [options] - stream options
  * @param {boolean} [options.objectMode=false] - specifies whether a stream should operate in object mode
  * @param {(string|null)} [options.encoding=null] - specifies how `Buffer` objects should be decoded to `strings`
  * @param {NonNegativeNumber} [options.highWaterMark] - specifies the maximum number of bytes to store in an internal buffer before ceasing to generate additional pseudorandom numbers
  * @param {string} [options.sep='\n'] - separator used to join streamed data
  * @param {NonNegativeInteger} [options.iter] - number of iterations
  * @param {PRNG} [options.prng] - pseudorandom number generator which generates uniformly distributed pseudorandom numbers
  * @param {PRNGSeedMT19937} [options.seed] - pseudorandom number generator seed
  * @param {PRNGStateMT19937} [options.state] - pseudorandom number generator state
  * @param {boolean} [options.copy=true] - boolean indicating whether to copy a provided pseudorandom number generator state
  * @param {PositiveInteger} [options.siter] - number of iterations after which to emit the PRNG state
  * @returns {Function} stream factory
  *
  * @example
  * var opts = {
  *     'sep': ',',
  *     'objectMode': false,
  *     'encoding': 'utf8',
  *     'highWaterMark': 64
  * };
  *
  * var createStream = factory( opts );
  *
  * // Create 10 identically configured streams...
  * var streams = [];
  * var i;
  * for ( i = 0; i < 10; i++ ) {
  *     streams.push( createStream( 3.0 ) );
  * }
  */
  function factory( k, options ) {
  	var nargs;
  	var opts;
  	var fcn;
  
  	nargs = arguments.length;
  	if ( nargs > 1 ) {
  		fcn = createStream2;
  		opts = copy( options, 1 );
  	} else if ( nargs === 1 ) {
  		if ( isPositive( k ) ) {
  			fcn = createStream2;
  			opts = {};
  		} else {
  			opts = copy( k, 1 );
  			fcn = createStream1;
  		}
  	} else {
  		opts = {};
  		fcn = createStream1;
  	}
  	return fcn;
  
  	/**
  	* Returns a readable stream for generating pseudorandom numbers drawn from a chi distribution.
  	*
  	* @private
  	* @param {PositiveNumber} k - degrees of freedom
  	* @throws {TypeError} `k` must be a positive number
  	* @throws {TypeError} options argument must be an object
  	* @throws {TypeError} must provide valid options
  	* @throws {Error} must provide a valid state
  	* @returns {RandomStream} Stream instance
  	*/
  	function createStream1( k ) {
  		return new RandomStream( k, opts );
  	}
  
  	/**
  	* Returns a readable stream for generating pseudorandom numbers drawn from a chi distribution.
  	*
  	* @private
  	* @throws {TypeError} `k` must be a positive number
  	* @throws {TypeError} options argument must be an object
  	* @throws {TypeError} must provide valid options
  	* @throws {Error} must provide a valid state
  	* @returns {RandomStream} Stream instance
  	*/
  	function createStream2() {
  		return new RandomStream( k, opts );
  	}
  }
  
  
  // EXPORTS //
  
  module.exports = factory;
  