Linuxer, ex IBMer. GNU https://hmchzb19.github.io/
全部博文（297）
发布时间：2018-07-08 21:10:28
multivariate regression. (multiple regression)1. What if more than 1 variable influence the one you are interested in ?Example: predicting a price for a car based on its many attributes(body style, brand, mileage, etc.) 例如有多个因素都会影响车辆的价格，车型，品牌，公里数，车门数。#still.........【阅读全文】
发布时间：2018-06-21 14:41:33
polynomial regressionNot all relationships are linear. Linear formula: y=mx+b This is a "first order" or "first degree" polynomial , as the power of x is 1. Second order polynomial: y=ax**2 + bx + cThird order polynomial: y = ax**3 + bx**2 + cx + dHigher orders polynomial produce more c.........【阅读全文】
发布时间：2018-06-08 11:17:28
今天是Predictive Model (预测模型)Linear Regression: AKA likelihood estimation.Fit a line to a data set of observations.Use this line to predict unobserved values.其实Linear Regression 画出来就是一条直线。尽量靠近所有的数据点。 Linear Regression 可以用多种算法来做。 1- Linear Regression use .........【阅读全文】
发布时间：2018-05-31 15:12:35
conditional probability and Bayes' Theorem 这两个理论看的我头晕。1. conditional probabilityif I have two events that depend on each other, what's the probability that both will occur.Notation: P(A,B) is the probability of A and B both occuring independent of each other.P(B|A): probability of.........【阅读全文】
发布时间：2018-05-23 10:49:53
今天是covariance and correlation. 1. they give us a means of measuring just how tight these things are correlated, covariance: Measures how two variables vary in tandem from their means.correlation: -1 negative(inverse) correlation,one value increases, the other decreases. vice versa. 0 no corre.........【阅读全文】
fireboyz20052010-11-10 18:27
HI, 看到你"http://bbs.chinaunix.net/viewthread.php?tid=1806065"
这里的提问，你是不是在看一本叫《Shell脚本专家指南》的书？我也在阅读，我新手，不如大家交流一下，看到不明白也可以大家一起研究研究。
我的qq是：369035906
或gtalk:jiale.chan@gmail.com
