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351.Cost at parameters (loaded from ex4weights): 0.000000
352.(this value should be about 0.287629)
353.Program paused. Press enter to continue.
354.Get y size; give up; (2019-4-5)
355.Sigmoid function is correct; done; (2019-4-7)
356.Get to know size of delta; is a scalar; (2019-4-7)
357.Figure out size of each variables; (2019-4-9)
358.X, 5000400; 5000401; (2019-4-9)
359.Theta1, 25*401; (2019-4-9)

371.Q1
372.Q2
373.Q3
374.Q4
375.Q5
376.Q6
377.Modify ex4.m to make it clearer; (2019-4-11)
378.How to calculate error_train and error_val; compute cost when lambda = 0; (2019-4-12)
379.What is lambda? Passed; (2019-4-12)

299.Reinstall operating system on ubuntu; (2018-5-6)
300.Install shadowsocks on ubuntu; done; (2018-5-6)
301.办理身份证; 回来拿衣服; (2018-5-7)
302.考生档案所在单位名称; (2018-10-10)
303.Finish personal information; (2018-10-10)
304.Finish exam information; (2018-10-10)
305.查看交大浙大计算机系的专业设置; (2019-2-6)
306.找回12306密码；重设验证手机；done; （2019-3-9）
307. 预定酒店；预订火车票；done; （2019-3-9）
308. 填写志愿表；done; (2019-3-21)
309. Install octave; done; (2019-3-21)

321.Log in register and change direction; (2019-3-26)
322.Add a hypothesis to function; done; (2019-3-27)
323.Get inner product of vectors; done; (2019-3-27)
324.Get to know initial_theta, X, y, lambda; done; (2019-3-27)
325.Run cost, done; (2019-3-28)
326.Figure out what is legend; done; (2019-3-28)
327.What is y; 50001; (2019-3-29)
328.When to use y==c; done; (2019-3-29)
329.Figure out theta1 25(400+1), theta2 10*(25+1), X 5000400, p 50001; done; (2019-3-29)

551.Q6
552.Q7
553.Q8
554.Q9
555.Q10
556.Building your Deep Neural Network: Step by Step
557.1 - Packages
558.2 - Outline of the Assignment
559.3 - Initialization

361.Input, 400 units; hidden, 25 units; output, 10 units; (2019-4-9)
362.X, 5000400; 5000401; (2019-4-9)
363.Hidden, 500025; 500026; (2019-4-9)
364.Output, 500010; (2019-4-9)
365.What is the Greek letter? Delta; done; (2019-4-9)
366.Delta(3), column vector, 101; (2019-4-9)
367.Use a and z to replace input and output; done; (2019-4-9)
368.Figure out why neglecting first row; done; (2019-4-9)
369.Figure out how to calculate delta; done; (2019-4-9)

311.Call tianji; waiting until March 25; (2019-3-22)
312.Change github user name; done; (2019-3-22)
313.Install wamp on windows; done; (2019-3-23)
314.Install foxit reader; install java; (2019-3-23)
315.原来theta是向量，两个分量；done; (2019-3-24)
316.Install qq; change name; done; (2019-3-25)
317.Write weekly report; done; (2019-3-25)
318.Try to understand what is data; write a test; X is first two column; y is third column; (2019-3-26)
319. operator /: nonconformant arguments; use ./; done; (2019-3-26)

function story() { 从前有座山，山上有座庙，庙里有个老和尚，一天老和尚对小和尚讲故事：story() // 尾递归，进入下一个函数不再需要上一个函数的环境了，得出结果以后直接返回。}function story() { 从前有座山，山上有座庙，庙里有个老和尚，一天老和尚对小和尚讲故事：story()，小和尚听了，找了块豆腐撞死了 // 非尾递归，下一个函数结束以后此函数还有后续，所以必须保存本身的环境以供处理返回值。}

作者：酿泉
链接：https://www.zhihu.com/question/20761771/answer/23254340
来源：知乎
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。