@end deftypefn
@cindex strings, trimming
-@cindex whitespace, trimming
+@cindex white space, trimming
@deftypefn {Function} {} LTRIM (@var{string})
-Returns @var{string}, after removing leading spaces. Other whitespace,
+Returns @var{string}, after removing leading spaces. Other white space,
such as tabs, carriage returns, line feeds, and vertical tabs, is not
removed.
@end deftypefn
@end deftypefn
@cindex strings, trimming
-@cindex whitespace, trimming
+@cindex white space, trimming
@deftypefn {Function} {} RTRIM (@var{string})
Returns @var{string}, after removing trailing spaces. Other types of
-whitespace are not removed.
+white space are not removed.
@end deftypefn
@deftypefn {Function} {} RTRIM (@var{string}, @var{padding})
@subsection Miscellaneous Functions
@cindex functions, miscellaneous
-Miscellaneous functions take various arguments and produce various
-results.
-
@cindex cross-case function
@cindex function, cross-case
-@deftypefn {Function} {} LAG (@var{variable}[, @var{ncases}])
+@deftypefn {Function} {} LAG (@var{variable}[, @var{n}])
@anchor{LAG}
+
@var{variable} must be a numeric or string variable name. @code{LAG}
-results in the value of that variable for the case @var{ncases} before
-the current one. In case-selection procedures, @code{LAG} results in
-the value of the variable for the last case selected. Results in
-system-missing (for numeric variables) or blanks (for string
-variables) for the first case or before any cases are selected.
+yields the value of that variable for the case @var{n} before the
+current one. Results in system-missing (for numeric variables) or
+blanks (for string variables) for the first @var{n} cases.
+
+@code{LAG} obtains values from the cases that become the new active file
+after a procedure executes. Thus, @code{LAG} will not return values
+from cases dropped by transformations such as @cmd{SELECT IF}, and
+transformations like @cmd{COMPUTE} that modify data will change the
+values returned by @code{LAG}. These are both the case whether these
+transformations precede or follow the use of @code{LAG}.
+
+If @code{LAG} is used before @cmd{TEMPORARY}, then the values it returns
+are those in cases just before @cmd{TEMPORARY}. @code{LAG} may not be
+used after @cmd{TEMPORARY}.
If omitted, @var{ncases} defaults to 1. Otherwise, @var{ncases} must
be a small positive constant integer. There is no explicit limit, but
The following continuous distributions are available:
-@deftypefn {Function} {} PDF.BETA (@var{x}
+@deftypefn {Function} {} PDF.BETA (@var{x})
@deftypefnx {Function} {} CDF.BETA (@var{x}, @var{a}, @var{b})
@deftypefnx {Function} {} IDF.BETA (@var{p}, @var{a}, @var{b})
@deftypefnx {Function} {} RV.BETA (@var{a}, @var{b})
The following discrete distributions are available:
-@deftypefn {Function} {} PDF.BERNOULLI (@var{x}
+@deftypefn {Function} {} PDF.BERNOULLI (@var{x})
@deftypefnx {Function} {} CDF.BERNOULLI (@var{x}, @var{p})
@deftypefnx {Function} {} RV.BERNOULLI (@var{p})
Bernoulli distribution with probability of success @var{p}.