Question 1 Consider the problem of predicting how well a student does in her second year of college ...
plotData.m computeCost.m gradientDescent.m featureNormalize.m normalEqn.m ...
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Question 1 Consider the problem of predicting how well a student does in her second year of college ...
Gradient Descent for Multiple Variables 【1】多变量线性模型 代价函数 Answer:AB 【2】Feature Scaling 特征缩放 Answer:D 【3】学习速率 α Answer: B ...
* sigmoid.m * costFunction.m * predict.m * costFunctionReg.m ...
课上习题 【1】线性回归 Answer: D A 特征缩放不起作用,B for all 不对,C zero error不对 【2】概率 Answer:A 【3】预测图形 Answer:A 5 - x1 ≥ 0时,y = 1。即x1 ≤ 5时,y ...
* lrCostFunction.m * oneVsAll.m * predictOneVsAll.m ...
* nnCostFunction.m * sigmoidGradient.m ...
课上习题 【1】代价函数 【2】代价函数计算 【3】 【4】矩阵的向量化 【5】梯度校验 Answer:(1.013 -0.993) / 0.02 = 3.001 【6】梯度校验 Answer:学习的时候要去掉梯度校验,不然会特别慢 【7】随机 ...
【1】 Answer:C 【2】 Answer:D 第二层要输出四个元素a1 a2 a3 a4。输入x有两个,加一个x0是三个。所以是4 * 3 【3】 An ...