whatsnew7.hlp

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4.  {help vif} would occasionally fail to provide output for all applicable
    variables when some of the variables had been dropped from the model due
    to collinearity; this is fixed.


{hline 5} {hi:update 24aug2001} {hline}

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1.  On-line help and search index brought up to date for STB Reprints Vol. 10.
    Stata related FAQs found at {browse "http://www.ats.ucla.edu/stat/stata/"}
    have also been added to the search index.

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2.  {help findit} now allows the word "for" to be included among the search
    words.

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3.  {help ksm} now allows the {help gr7other:by()} option of {help graph}.

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4.  {help xtregar} would not report results when the time-variable was
    included in the regression and the {cmd:lbi} option was specified.
    {cmd:xtregar} now explicitly prohibits the inclusion of the time-variable
    in the regression.


{hline 5} {hi:update 14aug2001} {hline}

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1.  {help bs}, used with certain user-supplied commands, would sample from the
    entire data set even when some of the observations were not originally
    used.  Now {cmd:bs} checks if the user-supplied command is e-class and, in
    that case, resamples only the observations within the estimation
    subsample and, for other commands, {cmd:bs} displays a warning message.

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2.  {help gompertz} and {help stphtest} underwent slight output format
    corrections.

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3.  {help jknife}, when used on an e-class command, now excludes observations
    not in {cmd:e(sample)} from the leave-one-out estimators.

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4.  {help nlogit} reported an "unbalanced data" error when the values of the
    {cmd:group()} variable exceeded float precision.  This has been fixed.

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5.  {help xtnbreg:predict, nu0} and {help xtnbreg:predict, iru0} used after
    {help xtnbreg} has been corrected to account for the estimated dispersion
    parameters.


{hline 5} {hi:update 08aug2001} {hline}

{title:Stata executable(*), all platforms}

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1.  {help insheet} has new {cmd:delimiter("}{it:char}{cmd:")} option that
    allows you to specify an arbitrary character that separates values; see
    help {help insheet}.

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2.  {help gr7hist:graph, histogram} has a new {cmd:percent} option for placing
    percentages on the vertical axis; see help {help gr7hist}.

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3.  {help update} now saves in {cmd:r()} various information for use by
    programs; see help {help update}.

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4.  When drawing graphs, it was possible for differing line thicknesses of
    different pens not to be noticed if the color did not also change; this is
    fixed.

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5.  {help args:args x "a"} (note the incorrect double quotes), in addition
    to producing the appropriate error message, would cause a memory leak
    so that the user eventually also saw the error message "out of memory"
    and was thus forced to exit and restart Stata.

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6.  (Windows)
    {help log:log using} with a UNC name (i.e., \\{it:computername}\{it:path})
    would prefix the UNC name with the current directory and then refuse to
    open the file.  This is fixed.

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7.  (Unix) Whenever the print dialog was invoked, there was the possibility
    of a small memory leak, although the problem was never observed.
    It is fixed.

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8.  (Macintosh) Stata now supports Macintosh OS X.


{hline 5} {hi:update 30jul2001} {hline}

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1.  {help arch:predict} after estimation by {cmd:arch} with the option
    {cmd:archmexp()} issued an error message and would not produce
    predictions; this has been fixed.


{hline 5} {hi:update 23jul2001} {hline}

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1.  {help glm} would give a syntax error when both the {cmd:trace} and
    {cmd:irls} options were specified.  Also, the {cmd:eform} option was
    ignored for some {cmd:family()} specifications.  These problems have been
    fixed.

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2.  {help lookfor} now returns the list of matching variables in
    {hi:r(varlist)}.

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3.  {help reg3} with the {cmd:constraints()} option did not set e(sample);
    this has been fixed.

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4.  {help xtgee} and {help xtlogit} have a new {cmd:nodisplay} option that
    suppresses the header and table of coefficients.


{hline 5} {hi:update 17jul2001} {hline}

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1.  {help binreg} now respects the {cmd:init()} option.

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2.  {help findit} is a new command that finds and lists sources of
    information on Stata and Stata commands already installed on your computer
    or available on the web.  {cmd:findit} is Stata's most thorough, most
    complete search command.  The results include (1) official help-files
    installed on your computer, (2) FAQs available at the Stata website, (3)
    material published in the STB and the Stata Journal, and (4) user-written
    programs and help files available over the web.

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3.  {help reshape:reshape long} could produce incorrect results when (1)
    variable names for the {cmd:j()} identifier were longer than 8 characters,
    (2) the {cmd:j()} identifiers were string variables ({cmd:string} option
    specified), and (3) you were converting the data from wide to long.  This
    is fixed.

{p 2 6 2} 4.  {help sampsi} now includes both tails when calculating power for
a two-sided test.

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5.  {help svyintreg} followed by {cmd:predict} with the {cmd:pr()} or
    {cmd:e()} options now labels the generated variable in the same way as
    is done by {cmd:predict} after {help intreg}.


{hline 5} {hi:update 03jul2001} {hline}

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1.  {help areg} with robust variance calculations could produce a nonpositive
    definite variance matrix.  This is not an error, but sometimes {cmd:areg}
    would stop and produce an error message instead of posting the estimates.
    This has been fixed.

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2.  {help ivreg} with the {cmd:noconstant} and {cmd:first} options would
    display first-stage results which included _cons; this is fixed.  Note:
    there were NO errors in the final results presented by {cmd:ivreg}.

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3.  {help xi} now uses natural numeric coding in more cases when creating
    variable names.  Previously, if the variable had values larger than 99,
    {cmd:xi} would create its own coding to shorten the created variable
    names.  Longer variable names make this no longer necessary.


{hline 5} {hi:update 26jun2001} {hline}

{title:Stata executable(*), all platforms}

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1.  {help gettoken} sometimes presented an odd error message; the text of the
    message is improved.

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2.  {help graph:graph using}, when combining multiple graphs into one,
    could sometimes use the symbol from the first graph in subsequent
    graphs (it could do this when, in the subsequent graphs, the symbol was
    supposed to be invisible); this is fixed.

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3.  {help mlogit}, if it ever had the error "no room to add more variables"
    or "system limit exceeded", would continue to repeat that error until
    another estimation command was run.

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4.  {help regress} will no longer allow the {cmd:beta} and {cmd:cluster()}
    options to be combined.

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5.  {cmd:translate} could sometimes fail to read Stata graph
    (.gph) files if they were very large; this is fixed.

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6.  In the {help viewer}, one of the {help net} clickables would issue a
    syntax error if you clicked on it (because a comma was omitted); that
    is fixed.

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7.  (Macintosh) Internal changes have been made to {help update} to accommodate
     the forthcoming Macintosh OS X version of Stata (which will be available
     as a free update).


{hline 5} {hi:update 21jun2001} {hline}

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1.  On-line help and search index brought up to date for STB-61.


{hline 5} {hi:update 11jun2001} {hline}

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1.  {help icd9} and {help icd9p} have been updated to use the V18 codes; V16
    codes were previously used.  V16 and V18 codes have been merged so that
    {cmd:icd9} and {cmd:icd9p} work equally well with old and new datasets.
    See help icd9 for a description of {cmd:icd9} and {cmd:icd9p}; type
    "{stata icd9 query}" and "{stata icd9p query}" for a complete description
    of the changes to the codes used.


{hline 5} {hi:update 04jun2001} {hline}

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1.  {help boxcox} now accepts iweights.

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2.  {help boxcox} with the {cmd:lrtest} option now correctly reports the sigma
    from the unconstrained model.  Previously, {cmd:boxcox} would report the
    sigma from the last constrained model estimated.

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3.  {help egen}'s {cmd:cut()} function could, on rare occasions, produce
    inappropriate missing values due to the loss of precision from using
    local macros instead of scalars for the cut points; this is fixed.

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4.  {help egen}'s {cmd:diff(}{it:varlist}{cmd:)} function failed when the
    {it:varlist} was over 75 characters long.  The failure resulted from
    attempting to apply a variable label that was too long.  Now, if
    {it:varlist} is over 75 characters, no variable label is applied.

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5.  {help for} is now "version transparent".
    Previously, if you typed "{cmd:for} ...{cmd::} {it:cmd} ...", {it:cmd}
    would be executed as if you had first typed "{help version:version 6}".
    If {it:cmd} behaved differently under version 6 rather than version 7,
    {cmd:for} would execute the version-6 version of {it:cmd}.  This is fixed.
    Now {it:cmd} is executed according to whatever version you have set, just
    as you would expect.

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6.  {help glm:glm, jknife cluster()} now works with weights.

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7.  {help reg3} with option {cmd:ireg3} and {help sureg} with option
    {cmd:isure} now display the message "convergence not achieved" if the
    specified or maximum number of iterations is exceeded.  Also, to be
    consistent with {help ml}, the default number of iterations when
    {cmd:ireg3} or {cmd:isure} are specified has been increased to 16,000.

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8.  {help statsby} called with an empty expression list now gives a more
    informative error message.

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9.  {help table} would produce a syntax error for some valid {cmd:contents()}
    option specifications; this is fixed.


{hline 5} {hi:update 08may2001} {hline}

{title:Ado-files, all platforms}

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1.  {help egen} functions called using {cmd:_all} as the {it:varlist} would
    include an unanticipated temporary variable among the variables; this is
    fixed.

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2.  {help print} issued an error if {it:filename} had spaces in it; this is
    fixed.

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3.  The {help xi} update of 13apr2001 would produce an error message when
    executed after the user had manually deleted some variables created using
    previous versions of {cmd:xi}; this is fixed.


{title:Stata executable(*), all platforms}

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1.  {help file} is a new command that allows programmers to read and write
    both ASCII text and binary files; see help {help file}.  In addition, two
    new regular functions and one new macro-extended function were added for
    use when reading and writing binary files.

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New numeric function
    {help function:byteorder()} returns 1 or 2 depending on whether the
    computer writes the most or least significant byte first.

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New string
    function {help function:char({it:#})} returns the ASCII character
    corresponding to numeric code {it:#}, 0<{it:#}<256.

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New extended macro
    function {help macro:length} returns the length in characters of a local
    or global macro.

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Use of all of these new functions is described in
    help {help file}, although the new {cmd:length} extended function is
    useful in other contexts, too.

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2.  {help list} and {help correlate} now respect {help log:linesize}.
    {cmd:list} also has new option {cmd:noheader}.

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3.  Under certain circumstances, concatenating strings using the plus
    operator (e.g., {cmd:display stra+strb}, or
    {cmd:gen str80 newstr = stra+strb})
    when length(stra)+length(strb)>80, could produce unanticipated output and
    even cause Stata to crash.  This is fixed.


{hline 5} {hi:update 23apr2001} {hline}

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1.  {help mfx} produ