{smcl}
{* 04apr2005}{...}
{cmd:help undocumented}
{hline}

{title:Title}

{pstd}
{hi:Undocumented commands}


{title:Description}

{pstd}
An {it:undocumented command} is a command of very limited interest, usually
only to Stata programmers, and are used by StataCorp in developing Stata.

{pstd}
Undocumented commands are documented online, but their documentation does not
appear in the printed manuals.  That undocumented commands are
documented at all shows the "openness" of the Stata software.

{pstd}
Undocumented commands may change their syntax or behavior in subsequent
releases of Stata, though this is rare, so use them with caution.

{pstd}
See {help whatsnew} for a list of additions and fixes that have been made
to Stata.  See {helpb updates}, or
{update "from http://www.stata.com":click here} to obtain the latest additions
to Stata.  See {help forthcoming} for commands that are documented in the help
system but are not yet in the manuals (manual entries will be added in the next
release).


{title:Links to undocumented commands}

{pstd}
The following tables provide links to undocumented commands.  The links have
been grouped by the purpose of the commands.  The categories are
parsing, estimation command programming, graphics, survey, certification, and
miscellaneous.  Note that the {bf:Graphics} section also includes some
{it:style} definitions.

{p2colset 5 28 30 2}{...}
{p2col:{bf:Parsing}}description{p_end}
{p2line}
{p2col:{helpb _check4gropts}}check for illegal {helpb graph} options{p_end}
{p2col:{helpb _getcovcorr}}parse corr. and covariance matrix options{p_end}
{p2col:{helpb _getfilename}}handle path-filename specifications{p_end}
{p2col:{helpb _get_eformopts}}parse the multiple forms of {cmd:eform()}{p_end}
{p2col:{helpb _get_gropts}}parse graph options{p_end}
{p2col:{helpb _get_offopt}}obtain offset information{p_end}
{p2col:{helpb _nobs}}count the number of observations{p_end}
{p2col:{helpb _on_colon_parse}}parse based on colon{p_end}
{p2col:{helpb _parse}}parse complicated syntax (for instance,
	{helpb graph}){p_end}
{p2col:{help _prefix}}overview of tools for {it:prefix} commands{p_end}
{p2col:{helpb _score_spec}}parse syntax for generating score variables{p_end}
{p2col:{helpb _stubstar2names}}parse new variable lists{p_end}
{p2col:{helpb _vce_parserun}}parse the {cmd:vce()} option{p_end}
{p2col:{helpb opts_exclusive}}error message for mutually exclusive
	options{p_end}
{p2col:{helpb parse_dissim}}parse similarity and dissimilarity measures{p_end}
{p2line}

{p2col:{bf:Estimation}}description{p_end}
{p2line}
{p2col:{helpb _coef_table}}display estimation results{p_end}
{p2col:{helpb _coef_table_header}}automatic headers for coefficient
	tables{p_end}
{p2col:{helpb _diparm}}display ancillary parameters{p_end}
{p2col:{helpb _get_diparmopts}}handle multiple transform. of ancillary
	param.{p_end}
{p2col:{helpb _get_eformopts}}parse the multiple forms of {cmd:eform()}{p_end}
{p2col:{helpb _get_eqspec}}identify equation elements from coefficient
	vector{p_end}
{p2col:{helpb _get_offopt}}obtain offset information{p_end}
{p2col:{helpb _mkvec}}process {cmd:from()} option prior to
	{helpb ml:ml model}{p_end}
{p2col:{helpb _pred_se}}add single-equation extensions to
	{helpb predict}{p_end}
{p2col:{helpb matrix_makeCns}}constrained estimation; see {helpb makecns}
	instead{p_end}
{p2col:{helpb ml hold}}call {helpb ml} recursively{p_end}
{p2col:{helpb mlopts}}parse {helpb ml} options{p_end}
{p2line}

{p2col:{bf:Graphics}}description{p_end}
{p2line}
{p2col:{helpb _check4gropts}}check for illegal {helpb graph} options{p_end}
{p2col:{helpb _get_gropts}}parse {helpb graph} options{p_end}
{p2col:{helpb _matplot}}scatterplot of a matrix{p_end}
{p2col:{helpb _natscale}}obtain nice label or tick values{p_end}
{p2col:{helpb _parse}}parse complicated syntax (for instance,
	{helpb graph}){p_end}
{p2col:{helpb _tsnatscale}}obtain nice label or tick values for time
	series{p_end}
{p2col:{helpb di_g}}display debug messages in {helpb graph} commands{p_end}
{p2col:{helpb graph7}}old (prior to Stata8) graph command{p_end}
{p2col:{helpb gs_fileinfo}}obtain information about {cmd:.gph} file{p_end}
{p2col:{helpb gs_filetype}}determine type of {cmd:.gph} file{p_end}
{p2col:{helpb gs_graphinfo}}obtain information about memory graph{p_end}
{p2col:{helpb gs_stat}}verify (non)existence of graph{p_end}
{p2col:{it:{help labelstyle}}}formal definition of
	{it:{help markerlabelstyle}}{p_end}
{p2col:{helpb twoway sunflower}}graph density-distribution sunflower
	plots{p_end}
{p2col:{helpb twoway__function_gen}}parse and generate variables for
	{helpb twoway function}{p_end}
{p2col:{helpb twoway__histogram_gen}}generate variables for
	{helpb twoway histogram}{p_end}
{p2col:{helpb twoway__kdensity_gen}}parse and generate variables for
	{helpb twoway kdensity}{p_end}
{p2col:{it:{help sunflowerstyle}}}expanded {help pstyle} used for
	{helpb twoway sunflower}{p_end}
{p2line}

{p2col:{bf:Survey}}description{p_end}
{p2line}
{p2col:{helpb _svy_mkdeff}}calculate survey design effects{p_end}
{p2col:{helpb _svy_mkmeff}}calculate survey misspecification effects{p_end}
{p2col:{helpb _svy_setup}}retrieve {helpb svy} settings and adjust
	weights{p_end}
{p2col:{helpb is_svy}}determine if last estimation was {helpb svy} class{p_end}
{p2col:{helpb svygen}}generate adjusted sampling weights{p_end}
{p2line}

{p2col:{bf:Certification}}description{p_end}
{p2line}
{p2col:{helpb _assert_mreldif}}assert two matrices are the same{p_end}
{p2col:{helpb checkdlgfiles}}check dialog files for linkage errors{p_end}
{p2col:{helpb checkhlpfiles}}check help files for linkage errors{p_end}
{p2col:{helpb cscript}}begin a certification script{p_end}
{p2col:{helpb cscript_log}}begin or end a certification script log{p_end}
{p2col:{helpb dirstats}}report number of files in lettered
	subdirectories{p_end}
{p2col:{helpb lrecomp}}display log relative errors{p_end}
{p2col:{helpb mkassert}}generate {helpb assert}s for Stata objects{p_end}
{p2col:{helpb profiler}}profile Stata programs{p_end}
{p2col:{helpb rcof}}verify return code{p_end}
{p2col:{helpb savedresults}}manipulate and verify {cmd:r()} and {cmd:e()}
	results{p_end}
{p2line}

{p2col:{bf:Miscellaneous}}description{p_end}
{p2line}
{p2col:{helpb _confirm_date}}confirm a date string is given in a valid
	format{p_end}
{p2col:{helpb _crcar1}}compute AR(1) rho from residuals{p_end}
{p2col:{helpb _findhlpalias}}find help files{p_end}
{p2col:{helpb _labels2names}}make stata names for each level of a
	variable{p_end}
{p2col:{helpb _mtest}}perform multiple (simultaneous) testing adjustment{p_end}
{p2col:{helpb _qsort_index}}sort a list of words{p_end}
{p2col:{helpb _restore_labels}}restore value labels to variables{p_end}
{p2col:{helpb _strip_labels}}remove value labels from variables{p_end}
{p2col:{help _tab}}generate simple tables{p_end}
{p2col:{helpb anova_terms}}obtain {helpb anova} or {helpb manova} terms{p_end}
{p2col:{helpb anovadef}}obtain {helpb anova} or {helpb manova} term
	definitions{p_end}
{p2col:{helpb bitowt}}convert binary freq. records to freq. weighted
	data{p_end}
{p2col:{helpb brrstat}}report results from balanced repeated replication{p_end}
{p2col:{helpb copysource}}copy source code to current directory{p_end}
{p2col:{helpb ds}}list variables matching patterns{p_end}
{p2col:{helpb hadimvo}}identify multivariate outliers{p_end}
{p2col:{helpb inten}}numeric base conversion{p_end}
{p2col:{helpb jkstat}}report jackknife results{p_end}
{p2col:{help keyfiles}}explanation of {cmd:.key} files used by
	{helpb search}{p_end}
{p2col:{helpb mat_capp}}operate on matrices by names rather than
	positions{p_end}
{p2col:{helpb matalabel}}Create column vectors in {help Mata} containing value
	labels{p_end}
{p2col:{helpb plot}}draw scatterplot using typewriter characters{p_end}
{p2col:{helpb qby}}combination of {helpb quietly} and {helpb by}{p_end}
{p2col:{helpb sysdescribe}}describe shipped dataset{p_end}
{p2col:{helpb webdescribe}}describe data over the web{p_end}
{p2line}
{p2colreset}{...}


{title:Also see}

{psee}
Online:  {help forthcoming},
{helpb updates},
{help whatsnew},{break}
the tables above
{p_end}