whatsnew8_0.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{p 5 9 2}
{* fix}
3.  {help graph_pie:graph pie} refused to draw the graph if the data for any
    pie slice was zero.  {cmd:graph pie} now allows a pie slice to be zero, as
    long as at least one slice in the pie is positive.

{p 5 9 2}
{* fix}
4.  {help graph_twoway:graph twoway} with option {cmd:yaxis(2)}, could cause a
    very slight skewing of points plotted on the second {it:y} axis toward the
    center of the {it:x} dimension of the graph; this is fixed.  The skewing
    was only noticeable when points should have been plotted at the same
    {it:x} value.

{p 5 9 2}
{* enhancement}
5.  {help ipolate} now creates the new variable containing interpolated values
    using storage type {help double} instead of {cmd:float}.

{p 5 9 2}
{* fix}
6.  {help ml:ml model} did not apply the {cmd:subpop()} option correctly in
    cases where there was no {help weight} variable; this is fixed.  This
    affected {help svypoisson}, {help svynbreg}, {help svygnbreg},
    {help svyheckman}, and {help svyheckprob}.

{p 5 9 2}
{* fix}
7.  {help sttocc} would not produce any case observations when all
    observations failed or were censored at the same time, i.e., when the
    variance of _t was zero; this is fixed.


{hline 8} {hi:update 19mar2003} {hline}

    {title:Ado-files}

{p 5 9 2}
{* enhancement}
1.  {help cf} is now an r-class command and returns {cmd:r(Nsum)}, the number
    of differences found.  This addition was made in the 14mar2003 update, but
    was not mentioned then.

{p 5 9 2}
{* fix}
2.  {help graph_bar:graph bar} and {help graph_bar:graph hbar} in the rare
    case where two or more string variables were specified in {cmd:over()}
    options and the {cmd:asyvars} option was specified, could produce bar
    colors that did not match the colors in the legend.  This is fixed.

{p 5 9 2}
{* fix}
3.  {help graph_pie:graph pie} when the option {cmd:over()} was specified, did
    not respect {cmd:if} conditions or {cmd:by} groups in determining the size
    of the pie slices; this is fixed.

{p 5 9 2}
{* fix}
4.  {help sttocc} could produce inappropriate matches when the number of
    observations exceeded 32,740; this is fixed.


{hline 8} {hi:update 14mar2003} {hline}

    {title:Ado-files}

{p 5 9 2}
{* enhancement}
1.  Online help and search index brought up-to-date for
    {help sj:Stata Journal 3(1)}.

{p 5 9 2}
{* fix}
2.  {help histogram} and {help twoway_histogram:twoway histogram} would not
    include the minimum value in the first bin if the minimum value could not
    be exactly represented in numerical precision; this is fixed

{p 5 9 2}
{* fix}
3.  {help rocgold:rocgold, graph} excluded missing observations casewise,
    while {cmd:rocgold, summary} excluded them on a pairwise basis.  This
    inconsistency has been removed.  {cmd:rocgold} now uses casewise deletion
    of missing observations for both {cmd:graph} and {cmd:summary}.


{hline 8} {hi:update 10mar2003} {hline}

    {title:Ado-files}

{p 5 9 2}
{* fix}
1.  {help bootstrap} with the {cmd:bca} option now gives a more informative
    error message when it can not compute acceleration.

{p 5 9 2}
{* fix}
2.  {help bsample} with the {cmd:cluster()} option became noticeably slower as
    a result of options added in Stata 8.  This is no longer the case.

{p 5 9 2}
{* fix}
3.  {dialog ehistogram:easy histogram} dialog has been modified to remove the
    {cmd:xscale(log)} and {cmd:yscale(log)} options from the Axes tab since
    these options are rarely used with histograms.

{p 5 9 2}
{* enhancement}
4.  {help gladder} now has a {cmd:nonormal} option to suppress drawing the
    overlaid normal density.  The {dialog gladder} dialog has been modified to
    include this new option.

{p 5 9 2}
{* fix}
5.  (Windows) {help mf_option:graph set mf fontface} did not properly pass
    along double quotes around the specified font face; this is fixed.

{p 5 9 2}
{* enhancement}
6.  {dialog histogram}, {dialog ehistogram:easy histogram}, and
    {dialog gladder} dialogs have been modified to include the {cmd:percent}
    option which was added in the 25feb2003 update.


    {title:Stata executable}

{p 5 9 2}
{* enhancement}
7.  {help clist} is a new command similar to {cmd:list, clean}; {cmd:clist} is
    in fact the {cmd:list} command that appeared in Stata prior to Stata 8,
    options and all.  Some users needed the old command for backwards
    compatibility purposes; {help list} continues to be the preferred command.
    {cmd:clist} may be abbreviated {cmd:cl}; see help {help clist}.

{p 5 9 2}
{* enhancement}
8.  {help list} has new option {cmd:fast}, which is in fact a synonym for
    option {cmd:nocompress}.  {cmd:list} normally does a dry run to determine
    how best to format the display.  {cmd:nocompress} prevents that and, with
    very large datasets, this can save a little time before the output
    appears.  {cmd:fast} is a more suggestive name for the option in this
    case.  See help {help list}.

{p 5 9 2}
{* enhancement}
9.  {help flist} is a new command equivalent to {cmd:list, fast} or,
    equivalently, {cmd:list, nocompress}.  {cmd:flist} may be abbreviated
    {cmd:fl}; see help {help list}.

{p 4 9 2}
{* fix}
10.  {help use}, {help merge}, and {help append}, used with old-format
     datasets stored by Stata 7 or earlier, could change missing values stored
     in {help byte} or {help int} variables to nonmissing values.  Missings in
     {cmd:byte}s could be converted to 101 and missing in {cmd:int}s could be
     converted to 32,741.  This would happen only if the {cmd:byte} or
     {cmd:int} variable also contained nonmissing values greater than 100 or
     32,740 respectively and if the data were ordered in a certain way.  This
     is fixed.

{p 4 9 2}
{* fix}
11.  (Windows) {help graph_export:graph export} did not accept the
     {cmd:fontface()} option when exporting an Enhanced Metafile (emf); this
     is fixed.


{hline 8} {hi:update 25feb2003} {hline}

    {title:Ado-files}

{p 5 9 2}
{* enhancement}
1.  Five "easy" graph dialogs have been added to the previous eleven made
    available with the 10feb2003 update. These "easy" graph dialogs have been
    designed so that only the most essential options are exposed.  The
    full-featured graph dialogs are still available when more complex graphing
    is required.  The new easy graph dialogs are:

	     {dialog erfit:Regression fit}
	     {dialog epie1:Pie chart (by variables)}
	     {dialog epie2:Pie chart (by category)}
	     {dialog ehistogram:Histogram}
	     {dialog ematrix:Scatterplot matrix}

{p 5 9 2}
{* enhancement}
2.  The datasets used in the Stata manuals are now easily obtained starting
    with help {help dta_contents}.  Links are provided for describing a
    dataset before loading it, using a dataset, and viewing the associated
    help file.

{p 5 9 2}
{* fix}
3.  {help archlm} gave a misleading error message that said the command only
    works after {cmd:regress} and {cmd:newey}.  In fact, it will not work
    after {cmd:newey} and only works after {cmd:regress}.  The error message
    has been corrected.

{p 5 9 2}
{* fix}
4.  {help graph} with the {cmd:twoway}, {cmd:bar}, {cmd:hbar}, {cmd:box},
    {cmd:hbox}, {cmd:pie}, or {cmd:matrix} subcommands may now be specified
    with variables that are labeled with a string that contains unbalanced
    parentheses.  Previously, when a variable had such a label, an error
    message, {error:unbalanced parentheses}, would be issued and the graph was
    not drawn.

{p 5 9 2}
{* fix}
5.  {help graph:graph ... , xtitle()}.  The {{cmd:x}|{cmd:y}}{cmd:title()}
    options would not allow the words "{cmd:if}" or "{cmd:in}" to appear in
    the text of the title unless the text was quoted.  These words may now
    appear in unquoted text.  Note that unbound parentheses must be protected
    by quoting the text.

{p 5 9 2}
{* fix}
6.  {help graph_matrix:graph matrix , diagonal()} now allows blank strings,
    e.g. {cmd:""} or {cmd:`""'}, to be specified in the {cmd:diagonal()}
    option.  Previously this produced an error.

{p 5 9 2}
{* enhancement}
7.  {help histogram} and {help twoway_histogram:twoway histogram} have a new
    option {cmd:percent} that labels the vertical axis in percentages.

{p 5 9 2}
{* fix}
8.  {help intreg} would give an inappropriate error message when the
    {help matsize} was too small.  The error message has been improved.

{p 5 9 2}
{* fix}
9.  {help svyprop} would ignore {cmd:if} and {cmd:in}; this is fixed.

{p 4 9 2}
{* fix}
10.  {help svytest}, an out-of-date command superseded by {help test}, had a
     problem with extra quotation marks when version was set less than 8; this
     is fixed.

{p 4 9 2}
{* fix}
11.  {help twoway_histogram:twoway histogram} now allows {cmd:histogram} to be
     abbreviated down to {cmd:hist}, as documented in
     {hi:[G] graph twoway histogram}.

{p 4 9 2}
{* enhancement}
12.  {help twoway_lfitci:twoway lfitci}, {help twoway_qfitci:twoway qfitci},
     and {help twoway_fpfitci:twoway fpfitci} have a new option {cmd:nofit}
     that prevents the prediction from being plotted.

{p 4 9 2}
{* fix}
13.  {help twoway_rline:twoway rline} now allows {cmd:rline} to be abbreviated
     down to {cmd:rl}, as documented in {hi:[G] graph twoway rline}.


{hline 8} {hi:update 10feb2003} {hline}

    {title:Ado-files}

{p 5 9 2}
{* enhancement}
1.  Eleven "easy" graph dialogs have been added. These "easy" graph dialogs
    have been designed so that only the most essential options are exposed.
    The full-featured graph dialogs are still available when more complex
    graphing is required.  The following easy graph dialogs are available:

{col 14}{dialog escatter:Scatter plot}{...}
{col 44}{dialog edot:Dot chart}
{col 14}{dialog econnected:Connected scatter plot}{...}
{col 44}{dialog ebox:Box plot}
{col 14}{dialog eline:Line graph}{...}
{col 44}{dialog ehbox:Horizontal box plot}
{col 14}{dialog earea:Area graph}{...}
{col 44}{dialog efunction:Function graph}
{col 14}{dialog ebar:Bar chart}{...}
{col 44}{dialog etwoway_overlay:Overlaid twoway graphs}
{col 14}{dialog ehbar:Horizontal bar chart}

{p 5 9 2}
{* enhancement}
2.  The {cmd:Misc.} tab has been reorganized to be more intuitive for the
    following full-featured graph dialogs:

{col 14}{dialog bar:Bar chart}{...}
{col 44}{dialog box:Box plot}
{col 14}{dialog hbar:Horizontal bar chart}{...}
{col 44}{dialog hbox:Horizontal box plot}
{col 14}{dialog dot:Dot chart}

{p 5 9 2}
{* fix}
3.  {help bootstrap} now gives an improved error message when supplied with a
    statistic that results in a missing value when computed using the entire
    dataset.

{p 5 9 2}
{* fix}
4.  {help bootstrap} would ignore the {cmd:nopercentile} option; this is
    fixed.

{p 5 9 2}
{* fix}
5.  {help egen:egen ... ends(), tail} would return the whole string instead of
    the empty string when there was not a match; this is fixed.

{p 5 9 2}
{* fix}
6.  {help graph} with the option
    {c -(}{cmd:x}|{cmd:y}{c )-}{cmd:label(}...{cmd:, valuelabels)} did not
    show the labels for axis ticks when the numeric value of the tick was
    outside the range of the {it:x} ({it:y}) data.
    Instead, the numeric value was
    shown.  Labels, when available for the numeric tick value, are now always
    shown when option {cmd:valuelabels} is specified.

{p 5 9 2}
{* fix}
7.  {help graph} options {c -(}{cmd:y}|{cmd:x}{c )-}{cmd:title()} and
    {c -(}{cmd:y}|{cmd:x}{c )-}{cmd:tick()} were implemented and documented
    with the same minimal abbreviation {c -(}{cmd:y}|{cmd:x}{c )-}{cmd:ti()}.
    This sometimes lead to syntax errors when option
    {c -(}{cmd:y}|{cmd:x}{c )-}{cmd:title()} was specified with the minimal
    abbreviation.  The minimal abbreviation for
    {c -(}{cmd:y}|{cmd:x}{c )-}{cmd:tick()} has been changed to
    {c -(}{cmd:y}|{cmd:x}{c )-}{cmd:tic()}.

{p 5 9 2}
{* fix}
8.  {help graph_bar:graph bar} when specified with temporary variables as
    either the {it:y} variables or in the
    {cmd:over()} option would sometimes issue
    an error and refuse to draw the graph; this is fixed.

{p 5 9 2}
{* fix}
9.  {help graph_box:graph box} when specified with both the {cmd:capsize()}
    and {cmd:yscale(log)} options would distort the length of the whisker
    caps; this is fixed.

{p 4 9 2}
{* fix}
10.  {help graph_export:graph export} failed to recognize the {cmd:.wmf} and
     {cmd:.emf} suffixes due to a problem introduced in the 30jan2003 update;
     this is fixed.

{p 4 9 2}
{* fix}
11.  {help twoway_rcap:graph twoway rcap} would sometimes draw spurious caps on
     the connecting spikes when the graphed data included missing values; this
     is fixed.

{p 4 9 2}