随笔分类 -  Data Analysis with Open Source Tools

Chapter 8, Models from Scaling Arguments
摘要：看完了一遍，没有太大感觉。以后再补吧。 阅读全文
posted @ 2014-11-19 09:54 林中细雨 阅读(227) 评论(0) 推荐(0)
Chapter 7, Guesstimation and the Back of the Envelope
摘要：主要交了估计的方法和一些注意事项。应该是很有用，但是没仔细看啊。以后再说。 阅读全文
posted @ 2014-11-12 10:24 林中细雨 阅读(192) 评论(0) 推荐(0)
Intermezzo: A Data Analysis Session
摘要：# -*- coding: utf-8 -*-"""Created on Wed Nov 05 15:18:17 2014@author: dell"""import pandas as pdimport numpy as npimport datetimeimport matplotlib.pyp... 阅读全文
posted @ 2014-11-06 10:59 林中细雨 阅读(198) 评论(0) 推荐(0)
Chapter Four, Time As a Variable: Time-Series Analysis
摘要：the main components ofevery time series: Trend, Seasonality, Noise and Other. （大势，小周期，噪音和其他）。以下一段具体解释。The trend may be linear or nonlinear, and we may... 阅读全文
posted @ 2014-11-01 14:39 林中细雨 阅读(257) 评论(0) 推荐(0)
PIC2, Only When Appropriate: Summary Statistics and Box Plots
摘要：主要是箱形图，平均值，中位数，方差的计算及。内容再补。 阅读全文
posted @ 2014-10-27 15:21 林中细雨 阅读(172) 评论(0) 推荐(0)
PIC2, Rank-Order Plots, Lift Charts and Pareto chart
摘要：In cases like this, where the independent variable does not have an intrinsic ordering, it isoften a good idea to sort entries by the dependent variab... 阅读全文
posted @ 2014-10-24 11:11 林中细雨 阅读(282) 评论(0) 推荐(0)
PIC2, The Cumulative Distribution Function and Quantile Plot
摘要：Defination:累积分布函数：The cumulative distribution function (CDF) does just that. The CDF at point x tells us whatfraction of events has occurred “to the l... 阅读全文
posted @ 2014-10-23 21:01 林中细雨 阅读(436) 评论(0) 推荐(0)
PIC2, Kernel Density Estimates
摘要：核函数估计Demo Iimport sys,re,osimport numpy as npfrom scipy import stats import matplotlib.pylab as plt if __name__ == '__main__': # random data gra... 阅读全文
posted @ 2014-10-22 21:23 林中细雨 阅读(733) 评论(0) 推荐(0)
PIC2, Histograms
摘要：As a first guess,you can start with Scott’s rule for the bin widthw = 3.5σ/ 3√n,where σ is the standarddeviation for the entire data set and n is the ... 阅读全文
posted @ 2014-10-21 15:50 林中细雨 阅读(223) 评论(0) 推荐(0)
PIC2, Dot and Jitter Plots
摘要：点图，抖动图。http://jingyan.baidu.com/article/59703552eaf0fb8fc1074049.html横向或纵向加随机变量。其实也可以用气泡图。上为盗图。 阅读全文
posted @ 2014-10-21 15:23 林中细雨 阅读(288) 评论(0) 推荐(0)