在用R语言做数据分析的时候，我们经常需要一些数据做实验，尤其当学会一个新的方法或者算法的时候，就想赶快编程实现一下。那么，问题来了，用什么数据好呢，什么样的数据适合做这种实验呢？
好在R语言提供了很多的基本数据集，这些基本数据集是可以直接加载、可以完成几乎所有的数据分析任务模拟数据的。这都是些哪些种类的数据呢？
之前我们安装了 ggplot2 会使用其默认数据集，其实R语言自带也是有数据集的。
data(package = 'ggplot2')
R自带基本数据集都在R包datasets里面，可以执行命令：
data(package = 'datasets')
就会datasets包带的出现所有基本基本数据集：
Data sets in package ‘datasets’:
AirPassengers Monthly Airline Passenger Numbers 1949-1960
BJsales Sales Data with Leading Indicator
BJsales.lead (BJsales)
Sales Data with Leading Indicator
BOD Biochemical Oxygen Demand
CO2 Carbon Dioxide Uptake in Grass Plants
ChickWeight Weight versus age of chicks on different
diets
DNase Elisa assay of DNase
EuStockMarkets Daily Closing Prices of Major European Stock
Indices, 1991-1998
Formaldehyde Determination of Formaldehyde
HairEyeColor Hair and Eye Color of Statistics Students
Harman23.cor Harman Example 2.3
Harman74.cor Harman Example 7.4
Indometh Pharmacokinetics of Indomethacin
InsectSprays Effectiveness of Insect Sprays
JohnsonJohnson Quarterly Earnings per Johnson & Johnson
Share
LakeHuron Level of Lake Huron 1875-1972
LifeCycleSavings Intercountry Life-Cycle Savings Data
Loblolly Growth of Loblolly pine trees
Nile Flow of the River Nile
Orange Growth of Orange Trees
OrchardSprays Potency of Orchard Sprays
PlantGrowth Results from an Experiment on Plant Growth
Puromycin Reaction Velocity of an Enzymatic Reaction
Seatbelts Road Casualties in Great Britain 1969-84
Theoph Pharmacokinetics of Theophylline
Titanic Survival of passengers on the Titanic
ToothGrowth The Effect of Vitamin C on Tooth Growth in
Guinea Pigs
UCBAdmissions Student Admissions at UC Berkeley
UKDriverDeaths Road Casualties in Great Britain 1969-84
UKgas UK Quarterly Gas Consumption
USAccDeaths Accidental Deaths in the US 1973-1978
USArrests Violent Crime Rates by US State
USJudgeRatings Lawyers' Ratings of State Judges in the US
Superior Court
USPersonalExpenditure
Personal Expenditure Data
UScitiesD Distances Between European Cities and Between
US Cities
VADeaths Death Rates in Virginia (1940)
WWWusage Internet Usage per Minute
WorldPhones The World's Telephones
ability.cov Ability and Intelligence Tests
airmiles Passenger Miles on Commercial US Airlines,
1937-1960
airquality New York Air Quality Measurements
anscombe Anscombe's Quartet of 'Identical' Simple
Linear Regressions
attenu The Joyner-Boore Attenuation Data
attitude The Chatterjee-Price Attitude Data
austres Quarterly Time Series of the Number of
Australian Residents
beaver1 (beavers) Body Temperature Series of Two Beavers
beaver2 (beavers) Body Temperature Series of Two Beavers
cars Speed and Stopping Distances of Cars
chickwts Chicken Weights by Feed Type
co2 Mauna Loa Atmospheric CO2 Concentration
crimtab Student's 3000 Criminals Data
discoveries Yearly Numbers of Important Discoveries
esoph Smoking, Alcohol and (O)esophageal Cancer
euro Conversion Rates of Euro Currencies
euro.cross (euro) Conversion Rates of Euro Currencies
eurodist Distances Between European Cities and Between
US Cities
faithful Old Faithful Geyser Data
fdeaths (UKLungDeaths)
Monthly Deaths from Lung Diseases in the UK
freeny Freeny's Revenue Data
freeny.x (freeny) Freeny's Revenue Data
freeny.y (freeny) Freeny's Revenue Data
infert Infertility after Spontaneous and Induced
Abortion
iris Edgar Anderson's Iris Data
iris3 Edgar Anderson's Iris Data
islands Areas of the World's Major Landmasses
ldeaths (UKLungDeaths)
Monthly Deaths from Lung Diseases in the UK
lh Luteinizing Hormone in Blood Samples
longley Longley's Economic Regression Data
lynx Annual Canadian Lynx trappings 1821-1934
mdeaths (UKLungDeaths)
Monthly Deaths from Lung Diseases in the UK
morley Michelson Speed of Light Data
mtcars Motor Trend Car Road Tests
nhtemp Average Yearly Temperatures in New Haven
nottem Average Monthly Temperatures at Nottingham,
1920-1939
npk Classical N, P, K Factorial Experiment
occupationalStatus Occupational Status of Fathers and their Sons
precip Annual Precipitation in US Cities
presidents Quarterly Approval Ratings of US Presidents
pressure Vapor Pressure of Mercury as a Function of
Temperature
quakes Locations of Earthquakes off Fiji
randu Random Numbers from Congruential Generator
RANDU
rivers Lengths of Major North American Rivers
rock Measurements on Petroleum Rock Samples
sleep Student's Sleep Data
stack.loss (stackloss)
Brownlee's Stack Loss Plant Data
stack.x (stackloss) Brownlee's Stack Loss Plant Data
stackloss Brownlee's Stack Loss Plant Data
state.abb (state) US State Facts and Figures
state.area (state) US State Facts and Figures
state.center (state) US State Facts and Figures
state.division (state)
US State Facts and Figures
state.name (state) US State Facts and Figures
state.region (state) US State Facts and Figures
state.x77 (state) US State Facts and Figures
sunspot.month Monthly Sunspot Data, from 1749 to "Present"
sunspot.year Yearly Sunspot Data, 1700-1988
sunspots Monthly Sunspot Numbers, 1749-1983
swiss Swiss Fertility and Socioeconomic Indicators
(1888) Data
treering Yearly Treering Data, -6000-1979
trees Diameter, Height and Volume for Black Cherry
Trees
uspop Populations Recorded by the US Census
volcano Topographic Information on Auckland's Maunga
Whau Volcano
warpbreaks The Number of Breaks in Yarn during Weaving
women Average Heights and Weights for American
Women
具体翻译一下各个数据集基本情况
向量euro #欧元汇率，长度为11，每个元素都有命名landmasses #48个陆地的面积，每个都有命名precip #长度为70的命名向量rivers #北美141条河流长度state.abb #美国50个州的双字母缩写state.area #美国50个州的面积state.name #美国50个州的全称
因子state.division #美国50个州的分类，9个类别state.region #美国50个州的地理分类
矩阵、数组euro.cross #11种货币的汇率矩阵freeny.x #每个季度影响收入四个因素的记录state.x77 #美国50个州的八个指标USPersonalExpenditure #5个年份在5个消费方向的数据VADeaths #1940年弗吉尼亚州死亡率（每千人）volcano #某火山区的地理信息（10米×10米的网格）WorldPhones #8个区域在7个年份的电话总数iris3 #3种鸢尾花形态数据Titanic #泰坦尼克乘员统计UCBAdmissions #伯克利分校1973年院系、录取和性别的频数crimtab #3000个男性罪犯左手中指长度和身高关系HairEyeColor #592人头发颜色、眼睛颜色和性别的频数occupationalStatus #英国男性父子职业联系
类矩阵eurodist #欧洲12个城市的距离矩阵，只有下三角部分Harman23.cor #305个女孩八个形态指标的相关系数矩阵Harman74.cor #145个儿童24个心理指标的相关系数矩阵
数据框airquality #纽约1973年5-9月每日空气质量anscombe #四组x-y数据，虽有相似的统计量，但实际数据差别较大attenu #多个观测站对加利福尼亚23次地震的观测数据attitude #30个部门在七个方面的调查结果，调查结果是同一部门35个职员赞成的百分比beaver1 #一只海狸每10分钟的体温数据，共114条数据beaver2 #另一只海狸每10分钟的体温数据，共100条数据BOD #随水质的提高，生化反应对氧的需求（mg/l）随时间（天）的变化cars #1920年代汽车速度对刹车距离的影响chickwts #不同饮食种类对小鸡生长速度的影响esoph #法国的一个食管癌病例对照研究faithful #一个间歇泉的爆发时间和持续时间Formaldehyde #两种方法测定甲醛浓度时分光光度计的读数Freeny #每季度收入和其他四因素的记录dating from #配对的病例对照数据，用于条件logistic回归InsectSprays #使用不同杀虫剂时昆虫数目iris #3种鸢尾花形态数据LifeCycleSavings #50个国家的存款率longley #强共线性的宏观经济数据morley #光速测量试验数据mtcars #32辆汽车在11个指标上的数据OrchardSprays #使用拉丁方设计研究不同喷雾剂对蜜蜂的影响PlantGrowth #三种处理方式对植物产量的影响pressure #温度和气压Puromycin #两种细胞中辅因子浓度对酶促反应的影响quakes #1000次地震观测数据（震级>4）randu #在VMS1.5中使用FORTRAN中的RANDU三个一组生成随机数字，共400组。rock #48块石头的形态数据sleep #两药物的催眠效果stackloss #化工厂将氨转为硝酸的数据swiss #瑞士生育率和社会经济指标ToothGrowth #VC剂量和摄入方式对豚鼠牙齿的影响trees #树木形态指标USArrests #美国50个州的四个犯罪率指标USJudgeRatings #43名律师的12个评价指标warpbreaks #织布机异常数据women #15名女性的身高和体重
列表state.center #美国50个州中心的经度和纬度
类数据框ChickWeight #饮食对鸡生长的影响CO2 #耐寒植物CO2摄取的差异DNase #若干次试验中，DNase浓度和光密度的关系Indometh #某药物的药物动力学数据Loblolly #火炬松的高度、年龄和种源Orange #桔子树生长数据Theoph #茶碱药动学数据
时间序列数据airmiles #美国1937-1960年客运里程营收（实际售出机位乘以飞行哩数）AirPassengers #Box & Jenkins航空公司1949-1960年每月国际航线乘客数austres #澳大利亚1971-1994每季度人口数（以千为单位）BJsales #有关销售的一个时间序列BJsales.lead #前一指标的先行指标（leading indicator）co2 #1959-1997年每月大气co2浓度（ppm）discoveries #1860-1959年每年巨大发现或发明的个数ldeaths #1974-1979年英国每月支气管炎、肺气肿和哮喘的死亡率fdeaths #前述死亡率的女性部分mdeaths #前述死亡率的男性部分freeny.y #每季度收入JohnsonJohnson #1960-1980年每季度Johnson & Johnson股票的红利LakeHuron #1875-1972年某一湖泊水位的记录lh #黄体生成素水平，10分钟测量一次lynx #1821-1934年加拿大猞猁数据nhtemp #1912-1971年每年平均温度Nile #1871-1970尼罗河流量nottem #1920-1939每月大气温度presidents #1945-1974年每季度美国总统支持率UKDriverDeaths #1969-1984年每月英国司机死亡或严重伤害的数目sunspot.month #1749-1997每月太阳黑子数sunspot.year #1700-1988每年太阳黑子数sunspots #1749-1983每月太阳黑子数treering #归一化的树木年轮数据UKgas #1960-1986每月英国天然气消耗USAccDeaths #1973-1978美国每月意外死亡人数uspop #1790–1970美国每十年一次的人口总数（百万为单位）WWWusage #每分钟网络连接数Seatbelts #多变量时间序列。和UKDriverDeaths时间段相同，反映更多因素。EuStockMarkets #多变量时间序列。欧洲股市四个主要指标的每个工作日记录，共1860条记录。
当然了，如果我们想知道任意一个包自带有哪些数据集，可以有命令：> data(package = '包名')
data(package = 'ggplot2')
Data sets in package ‘ggplot2’:
diamonds Prices of over 50,000 round cut diamonds
economics US economic time series
economics_long US economic time series
faithfuld 2d density estimate of Old Faithful data
luv_colours 'colors()' in Luv space
midwest Midwest demographics
mpg Fuel economy data from 1999 to 2008 for 38
popular models of cars
msleep An updated and expanded version of the
mammals sleep dataset
presidential Terms of 11 presidents from Eisenhower to
Obama
seals Vector field of seal movements
txhousing Housing sales in TX