Standard sample data you can use in R

## AirPassangers
Monthly Airline Passenger Numbers 1949-1960
The classic Box & Jenkins airline data. 
Monthly totals of international airline passengers, 1949 to 1960.
> str(AirPassengers)
 Time-Series [1:144] from 1949 to 1961: 112 118 132 129 121 135 148 148 136 119 ...


## BJsales
Sales Data with Leading Indicator
The sales time series BJsales and leading indicator BJsales.lead each contain 150 observations. The objects are of class “ts”.
> str(BJsales)
 Time-Series [1:150] from 1 to 150: 200 200 199 199 199 ...

## BOD
Biochemical Oxygen Demand
The BOD data frame has 6 rows and 2 columns giving the biochemical oxygen demand versus time in an evaluation of water quality.
> str(BOD)
'data.frame':   6 obs. of  2 variables:
 $ Time  : num  1 2 3 4 5 7
 $ demand: num  8.3 10.3 19 16 15.6 19.8
 - attr(*, "reference")= chr "A1.4, p. 270"

## co2
Carbon Dioxide Uptake in Grass Plants
The CO2 data frame has 84 rows and 5 columns of data from an experiment on the cold tolerance of the grass species Echinochloa crus-galli.
> str(co2)
 Time-Series [1:468] from 1959 to 1998: 315 316 316 318 318 ...

## ChickWeight
Weight versus age of chicks on different diets
The ChickWeight data frame has 578 rows and 4 columns from an experiment on the effect of diet on early growth of chicks.
> str(ChickWeight)
Classes ‘nfnGroupedData’, ‘nfGroupedData’, ‘groupedData’ and 'data.frame':      578 obs. of  4 variables:
 $ weight: num  42 51 59 64 76 93 106 125 149 171 ...
 $ Time  : num  0 2 4 6 8 10 12 14 16 18 ...
 $ Chick : Ord.factor w/ 50 levels "18"<"16"<"15"<..: 15 15 15 15 15 15 15 15 15 15 ...
 $ Diet  : Factor w/ 4 levels "1","2","3","4": 1 1 1 1 1 1 1 1 1 1 ...
 - attr(*, "formula")=Class 'formula' length 3 weight ~ Time | Chick
  .. ..- attr(*, ".Environment")=<environment: R_EmptyEnv> 
 - attr(*, "outer")=Class 'formula' length 2 ~Diet
  .. ..- attr(*, ".Environment")=<environment: R_EmptyEnv> 
 - attr(*, "labels")=List of 2
  ..$ x: chr "Time"
  ..$ y: chr "Body weight"
 - attr(*, "units")=List of 2
  ..$ x: chr "(days)"
  ..$ y: chr "(gm)"

## DNase
Elisa assay of DNase
The DNase data frame has 176 rows and 3 columns of data obtained during development of an ELISA assay for the recombinant protein DNase in rat serum.
> str(DNase)
Classes ‘nfnGroupedData’, ‘nfGroupedData’, ‘groupedData’ and 'data.frame':      176 obs. of  3 variables:
 $ Run    : Ord.factor w/ 11 levels "10"<"11"<"9"<..: 4 4 4 4 4 4 4 4 4 4 ...
 $ conc   : num  0.0488 0.0488 0.1953 0.1953 0.3906 ...
 $ density: num  0.017 0.018 0.121 0.124 0.206 0.215 0.377 0.374 0.614 0.609 ...
 - attr(*, "formula")=Class 'formula' length 3 density ~ conc | Run
  .. ..- attr(*, ".Environment")=<environment: R_EmptyEnv> 
 - attr(*, "labels")=List of 2
  ..$ x: chr "DNase concentration"
  ..$ y: chr "Optical density"
 - attr(*, "units")=List of 1
  ..$ x: chr "(ng/ml)"

## EuStockMarkets
Daily Closing Prices of Major European Stock Indices, 1991-1998
Contains the daily closing prices of major European stock indices: Germany DAX (Ibis), Switzerland SMI, France CAC, and UK FTSE. The data are sampled in business time, i.e., weekends and holidays are omitted.
> str(EuStockMarkets)
 mts [1:1860, 1:4] 1629 1614 1607 1621 1618 ...
 - attr(*, "dimnames")=List of 2
  ..$ : NULL
  ..$ : chr [1:4] "DAX" "SMI" "CAC" "FTSE"
 - attr(*, "tsp")= num [1:3] 1991 1999 260
 - attr(*, "class")= chr [1:3] "mts" "ts" "matrix"

## Formaldehyde
Determination of Formaldehyde
These data are from a chemical experiment to prepare a standard curve for the determination of formaldehyde by the addition of chromatropic acid and concentrated sulphuric acid and the reading of the resulting purple color on a spectrophotometer.
> str(Formaldehyde)
'data.frame':   6 obs. of  2 variables:
 $ carb  : num  0.1 0.3 0.5 0.6 0.7 0.9
 $ optden: num  0.086 0.269 0.446 0.538 0.626 0.782

## HairEyeColor
Hair and Eye Color of Statistics Students
Distribution of hair and eye color and sex in 592 statistics students.
> str(HairEyeColor)
 table [1:4, 1:4, 1:2] 32 53 10 3 11 50 10 30 10 25 ...
 - attr(*, "dimnames")=List of 3
  ..$ Hair: chr [1:4] "Black" "Brown" "Red" "Blond"
  ..$ Eye : chr [1:4] "Brown" "Blue" "Hazel" "Green"
  ..$ Sex : chr [1:2] "Male" "Female"

## Harman23.cor
Harman Example 2.3
A correlation matrix of eight physical measurements on 305 girls between ages seven and seventeen.
> str(Harman23.cor)
List of 3
 $ cov   : num [1:8, 1:8] 1 0.846 0.805 0.859 0.473 0.398 0.301 0.382 0.846 1 ...
  ..- attr(*, "dimnames")=List of 2
  .. ..$ : chr [1:8] "height" "arm.span" "forearm" "lower.leg" ...
  .. ..$ : chr [1:8] "height" "arm.span" "forearm" "lower.leg" ...
 $ center: num [1:8] 0 0 0 0 0 0 0 0
 $ n.obs : num 305

## Harman74.cor
Harman Example 7.4
A correlation matrix of 24 psychological tests given to 145 seventh and eight-grade children in a Chicago suburb by Holzinger and Swineford.
> str(Harman74.cor)
List of 3
 $ cov   : num [1:24, 1:24] 1 0.318 0.403 0.468 0.321 0.335 0.304 0.332 0.326 0.116 ...
  ..- attr(*, "dimnames")=List of 2
  .. ..$ : chr [1:24] "VisualPerception" "Cubes" "PaperFormBoard" "Flags" ...
  .. ..$ : chr [1:24] "VisualPerception" "Cubes" "PaperFormBoard" "Flags" ...
 $ center: num [1:24] 0 0 0 0 0 0 0 0 0 0 ...
 $ n.obs : num 145