The functions used to assemble a tplyr_table object and each of the layers do not trigger the processing of any data. Rather, a lazy
execution style is used to allow you to contruct your table and then explicitly state when the data processing should happen.
build triggers this event.
build(x)
| x | A |
|---|
An executed tplyr_table
When the build command is executed, all of the data processing commences. Any preprocessing necessary within the table environment
takes place first. Next, each of the layers begins executing. Once the layers complete executing, the output of each layer is stacked
into the resulting data frame.
Once this process is complete, any post-processing necessary within the table environment takes place, and the final output can be
delivered. Metadata and traceability information are kept within each of the layer environments, which allows an investigation into the
source of the resulting datapoints. For example, numeric data from any summaries performed is maintained and accessible within
a layer using get_numeric_data.
tplyr_table, tplyr_layer, add_layer, add_layers, layer_constructors
# Load in Pipe library(magrittr) tplyr_table(iris, Species) %>% add_layer( group_desc(Sepal.Length, by = "Sepal Length") ) %>% add_layer( group_desc(Sepal.Width, by = "Sepal Width") ) %>% build()#> # A tibble: 12 x 8 #> row_label1 row_label2 var1_setosa var1_versicolor var1_virginica #> <chr> <chr> <chr> <chr> <chr> #> 1 Sepal Len… n " 50" " 50" " 50" #> 2 Sepal Len… Mean (SD) "5.01 (0.3… "5.94 (0.516)" "6.59 (0.636)" #> 3 Sepal Len… Median "5.00" "5.90" "6.50" #> 4 Sepal Len… Q1, Q3 "4.80, 5.2… "5.60, 6.30" "6.23, 6.90" #> 5 Sepal Len… Min, Max "4.3, 5.8" "4.9, 7.0" "4.9, 7.9" #> 6 Sepal Len… Missing " 0" " 0" " 0" #> 7 Sepal Wid… n " 50" " 50" " 50" #> 8 Sepal Wid… Mean (SD) "3.43 (0.3… "2.77 (0.314)" "2.97 (0.322)" #> 9 Sepal Wid… Median "3.40" "2.80" "3.00" #> 10 Sepal Wid… Q1, Q3 "3.20, 3.6… "2.52, 3.00" "2.80, 3.18" #> 11 Sepal Wid… Min, Max "2.3, 4.4" "2.0, 3.4" "2.2, 3.8" #> 12 Sepal Wid… Missing " 0" " 0" " 0" #> # … with 3 more variables: ord_layer_index <int>, ord_layer_1 <int>, #> # ord_layer_2 <int>