Javascript Arraymean() Array.prototype.mean =function() {return!this.length? 0 : this.reduce(function(pre, cur, i) {return(pre * i + cur) / (i + 1); });//fromwww.java2s.com}alert( [1,2,3,4,5].mean() );// 3alert( [].mean() );// 0 ...
Or you could modify your PlayingArrays array to be an array of objects, with a name field. It does mean you would have to reference the array inside the object before you use it. const PlayingArray = [ {name: 'Animals', values: Animals}, {name: 'People', values: People}, {n...
该方法定义了一个损失函数,该函数计算预测 Q 值和目标 Q 值之间的 meanSquaredError。然后,它使用tf.variableGrads()函数(附录 B,第 B.4 节包含了有关 TensorFlow.js 的梯度计算函数(如tf.variableGrads())的详细讨论)计算在线 DQN 权重相对于 meanSquaredError 的梯度。通过优化器使用计算出的梯度来更新 DQN ...
在简单的数学方程中,这一步骤在文献中被称为重参数化,看起来像是 js z = zMean + exp(zLogVar * 0.5) * epsilon 乘以0.5 将方差转换为标准差,这基于标准差是方差的平方根的事实。等效的 JavaScript 代码是 js z = zMean.add(zLogVar.mul(0.5).exp().mul(epsilon)); (见 listing 10.3。) 然后,z...
/*** Calculates the mean and standard deviation of each column of an array.** @param {Tensor2d} data Dataset from which to calculate the mean and* std of each column independently.** @returns {Object} Contains the mean and std of each vector* column as 1d tensors.*/export function de...
async function calculateMeanOfNonMissing( ***1***dataset, featureName) { ***1***let samplesSoFar = 0;let sumSoFar = 0;await dataset.forEachAsync(row => {const x = row[featureName];if (x != null) { ***2***samplesSoFar += 1;sumSoFar += x;}});return sumSoFar / samplesSoFa...
mean[dimension]= dataExtremes[dimension].min + ( Math.random() *dataRange[dimension] ); } means.push(mean); }returnmeans; }; 用该方法我们可以在数据集范围之内随机地生成几个新的数据点,一旦我们拥有了这些像种子一样的重心,就可以进入k-means循环过程了。如前所述,该循环过程包括首次为重心分配数据...
Functions are also objects, but of special type Any function can be invoked as a constructor, but this doesn't mean itshouldbe invoked as a constructor Functions, which are intended to be used as constructors, just calledconstructor functions. Tey have to be invoked with anewkeyword to constr...
If a number is used, instead, then the value is usually taken to mean the number of milliseconds in Universal Coordinated Time (UTC) since epoch, where epoch is defined as midnight January 1, 1970 (UTC). Again, this is a mere convention and not part of the JSON standard. If you are...
What does it mean that Array.prototype.sort "[compares] strings in UTF-16 code units order"? Ask Question Asked 5 years ago Modified 5 years ago Viewed 654 times Report this ad2 I'm learning about the Array.prototype.sort() in Javascript, and in https://developer.mozilla....