楼主: oliyiyi
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【latex版】水贴   [推广有奖]

851
oliyiyi 发表于 2015-9-9 16:44:28
  1. df_2011_demographics = get_county_demographics(2011)

  2. df_2011_demographics$value =
  3.     df_2011_demographics$percent_hispanic

  4. county_choropleth(df_2011_demographics,
  5.     title      = "Texas 2011 CountynPercent Hispanic",
  6.     legend     = "Percent Hispanic",
  7.     state_zoom = "texas")
复制代码

852
oliyiyi 发表于 2015-9-9 16:45:09

缺少币币的网友请访问有奖回帖集合
https://bbs.pinggu.org/thread-3990750-1-1.html

853
oliyiyi 发表于 2015-9-9 16:45:53
Homework: Use the function ?get_zip_demographics to make a map of some demographic in San Francisco County (FIPS code 6075) in 2011. get_zip_demographics is in the package choroplethrZip. Tweet the resulting image to me (@AriLamstein) with the hashtag #censuscourse.

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854
oliyiyi 发表于 2015-9-9 16:47:29
HOW DO YOU KNOW IF YOUR MODEL IS GOING TO WORK? PART 1: THE PROBLEM

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oliyiyi 发表于 2015-9-9 22:59:53
In-training set measures

The most tempting procedure is to score your model on the data used to train it. The attraction is this avoids the statistical inefficiency of denying some of your data to the training procedure.

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oliyiyi 发表于 2015-9-9 23:00:32
Run it once procedure

A common way to asses score quality is to run your scoring function on the data used to build your model. We might try comparing several models scored by AUC or deviance (normalized to factor out sample size) on their own training data as shown below.

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oliyiyi 发表于 2015-9-10 09:57:42
Our study aims to investigate the association between socioeconomic variables, selected symptoms, disorders and the SRH of participants from the eldercare home.

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oliyiyi 发表于 2015-9-10 10:20:46
In September 1979, China's Fifth National People's Congress passed a policy that encouraged one-child families. Following this decision from the Chinese Communist Party (CCP), campaigns were initiated to implement the One-Child Policy nationwide. This initiative constituted the most massive governmental attempt to control human fertility and reproduction in human history. These campaigns prioritized reproductive technologies for contraception, abortion, and sterilization in gynecological and obstetric medicine, while downplaying technologies related to fertility treatment.

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oliyiyi 发表于 2015-9-10 11:02:11
e saw that rank regression had a very statistically significant result. Therefore, the next step would be to evaluate the basic signals — whether or not there is statistical significance in the actual evaluation of the signal–namely, since the strategy from SeekingAlpha simply selects the top-ranked ETF every month, this is a very easy signal to evaluate.

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oliyiyi 发表于 2015-9-10 11:34:46
Cliff Smith’s strategy depends on the latter, effectively, among a group of five bond ETFs. I am not certain of the objective of the strategy (he didn’t mention it), as PCY, JNK, and CWB, while they may be fixed-income in name, possess volatility on the order of equities. I suppose one possible “default” objective would be to achieve an outperforming total return against an equal-weighted benchmark, both rebalanced monthly.

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