540—Appendix B. Command Reference

wfopen(type=html) "http://www.tradingroom.com.au/apps/mkt/ forex.ac" colhead=3, namepos=first

loads into a new workfile the data with the given URL located on the website site “http:// www.tradingroom.com.au”. The column header is set to three rows, with the first row used as names for columns, and the remaining two lines used to form the descriptions.

ODBC (Enterprise Edition only)

wfopen c:\data.dsn CustomerTable

opens in a new workfile the table named CUSTOMERTABLE from the ODBC database described in the DATA.DSN file.

wfopen(type=odbc) "my server" "select * from customers where id>30" @keep p*

opens in a new workfile with SQL query from database using the server “MY SERVER”, keeping only variables that begin with P. The query selects all variables from the table CUSTOMERS where the ID variable takes a value greater than 30.

Cross-references

See Chapter 3, “Workfile Basics”, on page 47 of the User’s Guide for a basic discussion of workfiles.

See also pageload (p. 392), read (p. 414), fetch (p. 291), wfsave (p. 540), and pagesave (p. 394).

Save the default workfile as an EViews workfile (.wf1 file) or as a foreign file or data source.

Syntax

Command: wfsave(options) [path\]filename

Command: wfsave(options) source_description [@keep keep_list] [@drop drop_list] [@keepmap keepmap_list] [@dropmap dropmap_list] [@smpl smpl_spec]

Command: wfsave(options) source_description table_description [@keep keep_list] [@drop drop_list] [@keepmap keepmap_list] [@dropmap dropmap_list] [@smpl smpl_spec]

saves the active workfile in the specified directory using filename. By default, the workfile is saved as an EViews workfile, but options may be used to save all or part of the active

wfsave—541

page in a foreign file or data source. See wfopen (p. 532) for details on the syntax for source_descriptions and table_descriptions.

Options

Workfile Save Options

The default workfile save settings use the Global Options.

Foreign Source Save Options

Cross-references

See also pagesave (p. 394), wfopen (p. 532), and pageload (p. 392).

542—Appendix B. Command Reference

wfselect Command

Make the selected workfile page the active workfile page.

Syntax

Command: wfselect wfname[\pgname]

where wfname is the name of a workfile that has been loaded into memory. You may optionally provide the name of a page in the new default workfile that you wish to be made active.

Examples

wfselect myproject

wfselect myproject\page2

both change the default workfile to MYPROJECT. The first command uses the default active page, while the second changes the page to PAGE2.

Examples

Cross-references

See also pageselect (p. 395).

Performs White’s test for heteroskedasticity of residuals.

Carries out White’s test for heteroskedasticity of the residuals of the specified equation or Var object. By default, the test is computed without the cross-product terms (using only the terms involving the original variables and squares of the original variables). You may elect to compute the original form of the White test that includes the cross-products.

White’s test is not available for equations estimated by binary, ordered, censored, or count. For a Var object, the command computes the multivariate version of the test.

Syntax

Equation View: eq_name.white(options)

544—Appendix B. Command Reference

Syntax

System Method: system_name.wls(options)

Options

sIterate sequentially over the computation of the weighting matrix and the estimation of the coefficient vector.

cOne step (iteration) of the coefficient vector estimates following one iteration of the weighting matrix.

Examples

sys1.wls

estimates the system of equations in SYS1 by weighted least squares.

Cross-references

See Chapter 23, “System Estimation”, on page 693 of the User’s Guide for a discussion of system estimation.