如何获取R或R包中可用的数据集列表？
基本R和不同R包中有许多数据集。这些数据集的特性非常不同，例如，一些数据集是时间序列数据，一些数据集只有数字列，一些数据集包含数值和因数列，有些包含字符列，而其他类型的列。因此，它对想要学习R编程使用的每个人都很有帮助。要获得基数R中可用数据集的列表，我们可以使用，data()但要获取包中可用数据集的列表，我们首先需要加载该包，然后data()命令显示该包中的可用数据集。同样，对于基数R中的数据集，我们可以使用ls（“ package：datasets”）。
示例
> data()
输出结果
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
示例
> ls("package:datasets")输出结果
[1] "ability.cov" "airmiles" "AirPassengers"[4] "airquality" "anscombe" "attenu"
[7] "attitude" "austres" "beaver1"
[10] "beaver2" "BJsales" "BJsales.lead"
[13] "BOD" "cars" "ChickWeight"
[16] "chickwts" "co2" "CO2"
[19] "crimtab" "discoveries" "DNase"
[22] "esoph" "euro" "euro.cross"
[25] "eurodist" "EuStockMarkets" "faithful"
[28] "fdeaths" "Formaldehyde" "freeny"
[31] "freeny.x" "freeny.y" "HairEyeColor"
[34] "Harman23.cor" "Harman74.cor" "Indometh"
[37] "infert" "InsectSprays" "iris"
[40] "iris3" "islands" "JohnsonJohnson"
[43] "LakeHuron" "ldeaths" "lh"
[46] "LifeCycleSavings" "Loblolly" "longley"
[49] "lynx" "mdeaths" "morley"
[52] "mtcars" "nhtemp" "Nile"
[55] "nottem" "npk" "occupationalStatus"
[58] "Orange" "OrchardSprays" "PlantGrowth"
[61] "precip" "presidents" "pressure"
[64] "Puromycin" "quakes" "randu"
[67] "rivers" "rock" "Seatbelts"
[70] "sleep" "stack.loss" "stack.x"
[73] "stackloss" "state.abb" "state.area"
[76] "state.center" "state.division" "state.name"
[79] "state.region" "state.x77" "sunspot.month"
[82] "sunspot.year" "sunspots" "swiss"
[85] "Theoph" "Titanic" "ToothGrowth"
[88] "treering" "trees" "UCBAdmissions"
[91] "UKDriverDeaths" "UKgas" "USAccDeaths"
[94] "USArrests" "UScitiesD" "USJudgeRatings"
[97] "USPersonalExpenditure" "uspop" "VADeaths"
[100] "volcano" "warpbreaks" "women"
[103] "WorldPhones" "WWWusage"
要查看包中的数据集，我们需要加载包，然后使用data()。这样，我们将在窗口底部找到一个包中可用的数据集列表，该窗口显示了基数R中的所有数据集。
示例
> library(ggplot2)> data()
输出结果
Data sets in package ‘ggplot2’:diamonds Prices of 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 and 2008 for 38
popular models of car
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
现在，我们可以使用ggplot2软件包的任何数据集，例如查看msleep数据的顶部行-
示例
> head(msleep)# A tibble: 6 x 11
输出结果
name genus vore order conservation sleep_total sleep_rem sleep_cycle awake<chr> <chr> <chr> <chr> <chr> <dbl> <dbl> <dbl> <dbl>
1 Chee~ Acin~ carni Carn~ lc 12.1 NA NA 11.9
2 Owl ~ Aotus omni Prim~ <NA> 17 1.8 NA 7
3 Moun~ Aplo~ herbi Rode~ nt 14.4 2.4 NA 9.6
4 Grea~ Blar~ omni Sori~ lc 14.9 2.3 0.133 9.1
5 Cow Bos herbi Arti~ domesticated 4 0.7 0.667 20
6 Thre~ Brad~ herbi Pilo~ <NA> 14.4 2.2 0.767 9.6
# ... with 2 more variables: brainwt <dbl>, bodywt <dbl>
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