Carbon Dioxide Uptake in Grass Plants

Echinochloa crus-galli.

alt text

Este es mi primer ejercicio de R.

Voy a importar la base de datos denominada “CO2”

data("CO2")

A continuación, voy a observar el cabezario de la base de datos

head(x=CO2)
##   Plant   Type  Treatment conc uptake
## 1   Qn1 Quebec nonchilled   95   16.0
## 2   Qn1 Quebec nonchilled  175   30.4
## 3   Qn1 Quebec nonchilled  250   34.8
## 4   Qn1 Quebec nonchilled  350   37.2
## 5   Qn1 Quebec nonchilled  500   35.3
## 6   Qn1 Quebec nonchilled  675   39.2

Voy a abrir la parte final de la base de datos de “CO2”

tail(x=CO2)
##    Plant        Type Treatment conc uptake
## 79   Mc3 Mississippi   chilled  175   18.0
## 80   Mc3 Mississippi   chilled  250   17.9
## 81   Mc3 Mississippi   chilled  350   17.9
## 82   Mc3 Mississippi   chilled  500   17.9
## 83   Mc3 Mississippi   chilled  675   18.9
## 84   Mc3 Mississippi   chilled 1000   19.9

Colocaré los tres primeros datos de la base “de datos”CO2”

head(CO2, n = 3)
##   Plant   Type  Treatment conc uptake
## 1   Qn1 Quebec nonchilled   95   16.0
## 2   Qn1 Quebec nonchilled  175   30.4
## 3   Qn1 Quebec nonchilled  250   34.8

Voy a presentar los últimos cuatro datos de la base de datos “CO2”

tail(CO2, n = 4)
##    Plant        Type Treatment conc uptake
## 81   Mc3 Mississippi   chilled  350   17.9
## 82   Mc3 Mississippi   chilled  500   17.9
## 83   Mc3 Mississippi   chilled  675   18.9
## 84   Mc3 Mississippi   chilled 1000   19.9

A continuación daré a conocer la visualizacion interna de la base de datos “CO2”

str(CO2)
## Classes 'nfnGroupedData', 'nfGroupedData', 'groupedData' and 'data.frame':   84 obs. of  5 variables:
##  $ Plant    : Ord.factor w/ 12 levels "Qn1"<"Qn2"<"Qn3"<..: 1 1 1 1 1 1 1 2 2 2 ...
##  $ Type     : Factor w/ 2 levels "Quebec","Mississippi": 1 1 1 1 1 1 1 1 1 1 ...
##  $ Treatment: Factor w/ 2 levels "nonchilled","chilled": 1 1 1 1 1 1 1 1 1 1 ...
##  $ conc     : num  95 175 250 350 500 675 1000 95 175 250 ...
##  $ uptake   : num  16 30.4 34.8 37.2 35.3 39.2 39.7 13.6 27.3 37.1 ...
##  - attr(*, "formula")=Class 'formula'  language uptake ~ conc | Plant
##   .. ..- attr(*, ".Environment")=<environment: R_EmptyEnv> 
##  - attr(*, "outer")=Class 'formula'  language ~Treatment * Type
##   .. ..- attr(*, ".Environment")=<environment: R_EmptyEnv> 
##  - attr(*, "labels")=List of 2
##   ..$ x: chr "Ambient carbon dioxide concentration"
##   ..$ y: chr "CO2 uptake rate"
##  - attr(*, "units")=List of 2
##   ..$ x: chr "(uL/L)"
##   ..$ y: chr "(umol/m^2 s)"

Voy a dar a conocer el numero de datos que conforman la misma base de datos “CO2”

nrow(CO2)
## [1] 84

Daré a conocer el número columnas que hay en la base de datos “CO2”

ncol(CO2)
## [1] 5

Voy a presentar las dimensiones de la base de datos

dim(CO2)
## [1] 84  5

A continuacion se indicaran los nombres de las columnas que conforman la base de datos “CO2”

names(CO2)
## [1] "Plant"     "Type"      "Treatment" "conc"      "uptake"

Presentaré los datos de la columna denominada “Treatment” y de la columna denominada “conc” de la base de datos “CO2”

CO2$Treatment
##  [1] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
##  [7] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [13] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [19] nonchilled nonchilled nonchilled chilled    chilled    chilled   
## [25] chilled    chilled    chilled    chilled    chilled    chilled   
## [31] chilled    chilled    chilled    chilled    chilled    chilled   
## [37] chilled    chilled    chilled    chilled    chilled    chilled   
## [43] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [49] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [55] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [61] nonchilled nonchilled nonchilled chilled    chilled    chilled   
## [67] chilled    chilled    chilled    chilled    chilled    chilled   
## [73] chilled    chilled    chilled    chilled    chilled    chilled   
## [79] chilled    chilled    chilled    chilled    chilled    chilled   
## Levels: nonchilled chilled
CO2$conc
##  [1]   95  175  250  350  500  675 1000   95  175  250  350  500  675 1000   95
## [16]  175  250  350  500  675 1000   95  175  250  350  500  675 1000   95  175
## [31]  250  350  500  675 1000   95  175  250  350  500  675 1000   95  175  250
## [46]  350  500  675 1000   95  175  250  350  500  675 1000   95  175  250  350
## [61]  500  675 1000   95  175  250  350  500  675 1000   95  175  250  350  500
## [76]  675 1000   95  175  250  350  500  675 1000

Otra forma de presentar la columna denominada “Treatment” de la base de datos “CO2”

CO2[, 3]
##  [1] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
##  [7] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [13] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [19] nonchilled nonchilled nonchilled chilled    chilled    chilled   
## [25] chilled    chilled    chilled    chilled    chilled    chilled   
## [31] chilled    chilled    chilled    chilled    chilled    chilled   
## [37] chilled    chilled    chilled    chilled    chilled    chilled   
## [43] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [49] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [55] nonchilled nonchilled nonchilled nonchilled nonchilled nonchilled
## [61] nonchilled nonchilled nonchilled chilled    chilled    chilled   
## [67] chilled    chilled    chilled    chilled    chilled    chilled   
## [73] chilled    chilled    chilled    chilled    chilled    chilled   
## [79] chilled    chilled    chilled    chilled    chilled    chilled   
## Levels: nonchilled chilled

Ahora se visualizrá la fila numero 5 de la base de datos “CO2”

CO2[5 , ]
##   Plant   Type  Treatment conc uptake
## 5   Qn1 Quebec nonchilled  500   35.3

A continuación se presenta el dato de la fila 8 de la columna 4

CO2[8 , 4]
## [1] 95

Aquí finalizo mi ejercicio 2 de Rstudio

Muchas Gracias