https://github.com/kehaowu/predictpm25

基于贝叶斯方法的pm2.5预测
https://github.com/kehaowu/predictpm25

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基于贝叶斯方法的pm2.5预测

• Host: GitHub
• URL: https://github.com/kehaowu/predictpm25
• Owner: KehaoWu
• License: mit
• Created: 2015-09-17T22:23:51.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-09-23T04:14:28.000Z (over 9 years ago)
• Last Synced: 2023-02-27T16:22:39.997Z (almost 2 years ago)
• Language: R
• Size: 336 KB
• Stars: 8
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Predict pm2.5 using Bayes method 

# 基于贝叶斯方法的pm2.5预测

理论公式推导见：[Conda's Blog](http://blog.how-to-code.info/r/Bayes-to-predict-PM25-based-on-China-data.html)

Crawler.R用来抓取pm2.5数据，抓取后结果见pm.RData

Predict.R包括一些预测pm2.5的函数，最新添加了最大似然估计期望值，并引入了LaPlace变换。

使用方法（基于长沙pm2.5数据）：

```R

    > predictPM25(pm25 = 72,city = "长沙市")

    Expected value: 61-90 

                     Pr

    1-30     0.09730849

    31-60    0.10724638

    61-90    0.11138716

    91-120   0.10186335

    121-150  0.09772257

    151-180  0.09689441

    181-210  0.09689441

    211-240  0.09689441

    241-270  0.09689441

    271-more 0.09689441

```