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## what is cheat sheet
[https://en.wikipedia.org/wiki/Cheat_sheet](https://en.wikipedia.org/wiki/Cheat_sheet)
A cheat sheet (also cheatsheet) or crib sheet is a concise set of notes used for quick reference.
Cheat sheets are so named because they may be used by students without the instructor's knowledge to cheat on a test. However, at higher levels of education where rote memorization is not as important as in basic education, students may be permitted to consult their own notes (crib notes, or crib sheet) during the exam (which is not considered cheating). The act of preparing a crib sheet can be an educational exercise, and students are sometimes only allowed to use crib sheets they have written themselves.
https://www.rstudio.com/resources/cheatsheets/#contributed-cheatsheets
https://github.com/rstudio/cheatsheets/raw/master/powerpoints/0-template.pptx
http://kaiwu.city/index.php/downloads?task=download.send&id=5&catid=3&m=0
{pdf=images/R_cheatsheets.pdf|100%|1024|native}
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https://www.ted.com/talks/juan_enriquez_how_technology_changes_our_sense_of_right_and_wrong
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survey package
http://r-survey.r-forge.r-project.org/survey/
https://www.stat.auckland.ac.nz/people/tlum005
http://faculty.washington.edu/tlumley/cv.html
{pdf=images/openfiles/complex_survey_article.pdf|100%|700|complex_survey_article.pdf}
http://r-survey.r-forge.r-project.org/svybook/
package
{pdf=http://cran.fhcrc.org/web/packages/survey/survey.pdf|100%|700|http://cran.fhcrc.org/web/packages/survey/survey.pdf}
The Comprehensive R Archive Network
https://faculty.washington.edu/tlumley/old-survey/survey-wss.pdf
https://campus.datacamp.com/courses/analyzing-survey-data-in-r
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Datasets and Documentation
NCHS no longer uses Internet Explorer; for best results, it is recommended that you use either Google Chrome or Microsoft Edge when accessing NCHS webpages. If you have questions, please contact the Ambulatory and Hospital Care Statistics Branch at 301-458-4600 or ambcare@cdc.gov.
Downloadable Data Files
Data Notices
NHAMCS Outpatient Department Data from 2012-2017
Possible Problems Downloading Data Files and Documentation
Downloadable Documentation
Public Use Data File Documentation Updates
Methodology Used to Create “Initial Visit” for 2005 and 2006 NHAMCS pdf icon[PDF – 37 KB]
Documentation Notices
Supplemental Documentation Files for 1993-99 NAMCS and 1992-99 NHAMCS
SAS Documentation and Datasets
SAS Input Statements
SAS Variable Labels and Format Assignments
SAS Value Labels
Pre-made SAS Datasets for 2015, 2016, and 2018 NAMCS
SAS Input Statements
SAS Variable Labels and Format Assignments
SAS Value Labels
SAS Value Labels
Pre-made SAS Datasets for 2015-2018 NHAMCS ED
SPSS Documentation and Datasets
Stata Documentation and Datasets
NAMCS and NHAMCS data can also be downloaded from the Inter-University Consortium for Political and Social Research (ICPSR)external icon.
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Free Datasets
https://r-dir.com/reference/datasets.html
World Bank Data - Literally hundreds of datasets spanning many decades, sortable by topic or country. Data is downloadable in Excel or XML formats, or you can make API calls. This is an outstanding resource.
Gapminder - Hundreds of datasets on world health, economics, population, etc. All of it is viewable online within Google Docs, and downloadable as spreadsheets.
The Data Hub - Hosted by CKAN. Most of these datasets come from the government.
Datamob - List of public datasets.
Numbrary - Lists of datasets.
Kaggle - Kaggle is a site that hosts data mining competitions. Each competition provides a data set that's free for download.
SNAP - Stanford's Large Network Dataset Collection. This list has several datasets related to social networking. Lots of fun in here!
KONECT - The Koblenz Network Collection. Several datasets related to social networking & Wikipedia.
Million Song Dataset - This is a collection of audio features and metadata for a million contemporary popular music tracks.
Energy Information Administration - This site offers a number of datasets on energy production, consumption, sources, etc.
GeoDa Center - This is a collection of geospatial datasets offered by Arizona State Univerisity's Center for Geospatial Analysis & Computation.
Reddit Datasets - This last one isn't a dataset itself, but rather a social news site devoted to datasets. It's updated regularly with news about newly available datasets.
Quandl - This is a web-based front end to a number of public data sets. What's nice about this website is that it allows for the combination of data from a number of sources, and can export the data in a number of formats.
1,001 Datasets - This is a list of lists of datasets. There's not much organization here, but there really are a LOT of datasets. Dive in and have fun.
Yahoo! Webscope - A reference library of interesting and scientifically useful datasets for non-commercial use by academics and other scientists.
Time Series Data Library - Curated by Professor Rob Hyndman of Monash University in Australia, this is a collection of over 500 datasets containing time-series data, organized by category.
Awesome Public Datasets - Curated list of hundreds of public datasets, organized by topic.
Common Crawl - Massive dataset of billions of pages scraped from the web. The data itself is on Amazon Public Datasets, so its easy to load it into an EC2 instance there. The dataset is updated with a new scrape about once per month.
Amazon Public Datasets - Collection of datasets that are ready to be loaded into an EC2 instance.