7.2.1 The create_object() function

The function create_object() can be used to create an Eviews object in the existing EViews workfile.

create_object(wf = "EviewsR_workfile", action = "equation", action_opt = "",
    object_name = "eviews_equation", view_or_proc = "ls", options_list = "",
    arg_list = "y ar(1)")

create_object(wf = "EviewsR_workfile", object_name = "x1", object_type = "series",
    expression = "y^2")

7.2.2 The eviews_graph() function

EViews graphs can be included in R Markdown or Quarto document by eviews_graph() function.

To create graph from existing EViews series objects:

eviews_graph(wf = "EviewsR_workfile", page = "EviewsRPage", series = "x y",
    mode = "overwrite", graph_procs = "setelem(1) lcolor(red) lwidth(4)",
    graph_options = "m")

Figure 7.2: Graphs of existing EViews series objects imported by fig-eviewsGraph chunk

We can also create graph objects from an R dataframe

Data = data.frame(x = cumsum(rnorm(100)), y = cumsum(rnorm(100)))
eviews_graph(series = Data, group = TRUE, start_date = "1990Q4",
    frequency = "Q")

Figure 7.3: Graphs of an R dataframe imported by fig-eviewsGraph1 chunk

To plot a scatter graph and histogram on the same frame:

eviews_graph(wf = "EviewsR_workfile", page = "EviewsRPage", series = "x y",
    group = T, graph_command = "scat(ab=histogram) linefit()",
    mode = "overwrite", graph_procs = "setelem(1) lcolor(green) lwidth(2)")

Figure 7.4: Scatter graph along with histogram

7.2.3 The eviews_import() function

Data can be imported from external sources by eviews_import() function.

eviews_import(source_description = "eviews_import.csv", start_date = "1990",
    frequency = "m", rename_string = "x ab", smpl_string = "1990m10 1992m10")

Alternatively, use the dataframe as the source_description.

eviews_import(source_description = Data, wf = "eviews_import1",
    start_date = "1990", frequency = "m", rename_string = "x ab",
    smpl_string = "1990m10 1992m10")

7.2.4 The eviews_pagesave() function

Similar to Eviews workfile, an Eviews page can be saved in various formats by eviews_pagesave() function.

eviews_pagesave(wf = "eviewsr_workfile", page = "EviewsRPage",
    source_description = "pagesave.csv", drop_list = "y")

7.2.5 The eviews_wfcreate() function

An Eviews workfile can be created using eviews_wfcreate() function in R.

eviews_wfcreate(wf = "eviews_wfcreate", page = "EviewsRPage",
    frequency = "m", start_date = "1990", end_date = "2022")

Create a workfile from a dataframe

eviews_wfcreate(source_description = Data, wf = "eviews_wfcreate1",
    page = "EviewsR_page", frequency = "m", start_date = "1990")

7.2.6 The eviews_wfsave() function

An EViews workfile can be saved various output formats using eviews_wfsave() in function in R.

eviews_wfsave(wf = "eviewsr_workfile", source_description = "wfsave.csv")

7.2.7 The exec_commands() function

A set of Eviews commands can be executed with the help of exec_commands() function in R.

exec_commands(c("wfcreate(wf=exec_commands,page=eviewsPage) m 2000 2022"))

eviewsCommands = "pagecreate(page=eviewspage1) 7 2020 2022
for %page eviewspage eviewspage1
pageselect {%page}
genr y=@cumsum(nrnd)
genr x=@cumsum(nrnd)
equation ols.ls y c x
graph x_graph.line x
graph y_graph.area y
freeze(OLSTable,mode=overwrite) ols
next"
exec_commands(commands = eviewsCommands, wf = "exec_commands")

7.2.8 The export_dataframe() function

Use export_dataframe() function to export dataframe object to Eviews.

export_dataframe(wf = "export_dataframe", source_description = Data,
    start_date = "1990", frequency = "m")

7.2.9 The import_equation() function

Import EViews equation data members into R, R Markdown or Quarto.

import_equation(wf = "EviewsR_workfile", page = "EviewsRPage",
    equation = "OLS")

To access the imported equation in base R:

7.2.10 The import_graph() function

Import EViews graph objects(s) into R, R Markdown or Quarto.

import_graph(wf = "eviewsr_workfile")

Figure 7.5: EViews graphs imported using import_graph() function

To import only graphs that begin with x:

import_graph(wf = "exec_commands", graph = "x*")

Figure 7.6: EViews graphs that begin with X imported using import_graph() function

7.2.11 The import_kable() function

Eviews tables can be imported as kable object by import_kable() function. Therefore, we can include the

import_kable(wf = "EViewsR_workfile", page = "EviewsRPage", table = "OLSTable",
    format = "html", caption = "Selected cells of EViews table imported using import_kable() function",
    range = "r7c1:r10c5", digits = 3)

7.2.12 The import_series() function

Use import_series() function to import data from EViews to R as a dataframe. The function creates a new environment eviews, whose objects can be accessed via eviews$pageName.

import_series(wf = "eviewsr_workfile")

To access the series in base R:

eviews$eviewspage %>%
    head()

To import the series as an xts object:

import_series(wf = "eviewsr_workfile", series = c("x", "y"),
    class = "xts")

7.2.13 The import_table() function

Import EViews table objects(s) into R, R Markdown or Quarto.

To import all table objects across all pages

import_table(wf = "EviewsR_workfile")

To import specific table objects, for example OLSTable

import_table(wf = "EviewsR_workfile", table = "OLStable")

To import table objects on specific pages

import_table(wf = "EviewsR_workfile", page = " EviewsRPage")

To access the table in base R (eviews$pageName_tableName)

eviews$eviewspage_olstable

7.2.14 The import_workfile() function

Import EViews equation data members, graph, series and table objects(s) into R, R Markdown or Quarto. This function is a blend of import_equation(), import_graph(), import_series() and import_table() functions.

To import all equation, graph, series and table objects across all pages

import_workfile(wf = "EviewsR_workfile")

Figure 7.7: EViews graphs automatically imported by import_workfile() function

To import specific objects

import_workfile(wf = "exec_commands", equation = "ols", graph = "x*",
    series = "y*", table = "ols*")

To import objects on specific page(s)

import_workfile(wf = "exec_commands", page = "eviewspage eviewspage1")

To access the objects in base R:

eviews$eviewspage_ols  # equation
# eviewspage-x_graph # graph saved in 'figure/' folder
eviews$eviewspage %>%
    head()  # series
eviews$eviewspage_olstable  # table

7.2.15 The rwalk() function

A set of random walk series can be simulated in R using EViews engine, thanks to rwalk() function.

rwalk(wf = "eviewsr_workfile", series = "X Y Z", page = "", rndseed = 12345,
    frequency = "M", num_observations = 100, class = "xts")

xts::plot.xts(rwalk$xyz, type = "l", main = "")
ggplot2::autoplot(rwalk$xyz)

Figure 7.8: Plots of imported EViews random walk series objects

7.2.16 Demo

The demo files are included and can be accessed via demo(package="EviewsR")

demo(create_object())
demo(eviews_graph())
demo(eviews_import())
demo(eviews_pagesave())
demo(eviews_wfcreate())
demo(eviews_wfsave())
demo(exec_commands())
demo(export_dataframe())
demo(import_equation())
demo(import_graph())
demo(import_kable())
demo(import_series())
demo(import_table())
demo(import_workfile())
demo(rwalk())
demo(set_eviews_path())