摘要：不同的λ(0,1,10,100)值对regularization的影响\ 预测新的值和计算模型的精度%% ============= Part 2: Regularization and Accuracies =============% Optional Exercise:% In this ... 阅读全文

摘要：求得θ值后用模型来预测 / 计算模型的精度ex2.m部分程序%% ============== Part 4: Predict and Accuracies ==============% After learning the parameters, you'll like to use it t... 阅读全文

摘要：Regularized logistic regression : mapFeature(将feature增多) and costFunctionRegex2_reg.m文件中的部分内容%% =========== Part 1: Regularized Logistic Regression ==... 阅读全文

摘要：Regularized logistic regression : plot data(画样本图)ex2data2.txt0.051267,0.69956,1-0.092742,0.68494,1-0.21371,0.69225,1-0.3... 阅读全文

摘要：画decision boundary(直线)%% ============= Part 3: Optimizing using fminunc =============% In this exercise, you will use a built-in function (fminunc) t... 阅读全文

摘要：sigmoid.m文件function g = sigmoid(z)%SIGMOID Compute sigmoid functoon% J = SIGMOID(z) computes the sigmoid of z.g = zeros(size(z)); 初始化g ,z可以是一个数，一个向量... 阅读全文

摘要：画出data数据 data数据 34.62365962451697,78.0246928153624,030.28671076822607,43.89499752400101,035.84740876993872,72.90219802708364,060.18259938620976,86.308 阅读全文

摘要：matlab的下标从1开始matlab结束运行快捷键 ctrl+c如何使一个向量里面的所有元素变成原来的平方 y=x.^2（.代表的是对元素进行操作）如何将向量里面的所有元素进行累加 sum(x)矩阵转置的表示 ’ 来表示矩阵转置...表示 ...表示连接到下一行，表... 阅读全文