{smcl}
{* 13-Aug2004; rev 18-Oct2004}
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help for {hi:floattolong}
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{title:Change float-type variables to long where possible.}

{p 8 17 2}
{cmd:floattolong} [{it:varlist}]

{title:Description}

{p 4 4 2}
This is simply a convenience, issuing {cmd:recast long} {it:varlist2}, where
{it:varlist2} is the set of variables in {it:varlist} that are of type
{cmd:float}.
This has some resemblance to, and is intended to complement {cmd:compress},
but the emphasis is on the
appropriateness of the type rather than the reduction of storage space.
(While {cmd:compress} does potentially change {cmd:float}s and {cmd:double}s
to integer types, it omits the possibility of changing a {cmd:float} to a
{cmd:long}, as that does not reduce the storage space.)

{p 4 4 2}
{cmd:floattolong} would be typically used immediately following (or preceding)
{cmd:compress}, and saves you the trouble of seeking out all the remaining
{cmd:float} variables.

{p 4 4 2}
If no {it:varlist} is specified, {cmd:_all} is assumed.

{p 4 4 2}
{cmd:floattolong} ignores variables that are not {cmd:float}.


{title:Examples}

{p 4 8 2}{cmd:. floattolong}{p_end}

{p 4 8 2}{cmd:. floattolong wage income}{p_end}


{title:Remarks}

{p 4 4 2}
{cmd:floattolong} can be used at any point, but is best used
in conjunction with (immediately after or before) {cmd:compress}; without
{cmd:compress}, it may recast
some variables to {cmd:long} that might otherwise become {cmd:int} or
{cmd:byte}.

{p 4 4 2}
In general data preparation, {cmd:floattolong} would usually be called
without a {it:varlist}; there is little point in calling it with a specific
set of variables, since you could just as well type {cmd:recast long} 
with the same {it:varlist}.  The exception is where you use it within a
program that generates a variable that is initially {cmd:float}, and you
want to clean up that one variable without affecting others.

{p 4 4 2}
For a similar related program, see {help doubletofloat} by the same author.


{title:Author}

{p 4 4 2}
David Kantor, Institute for Policy Studies, Johns Hopkins University.
Email {browse "mailto:dkantor@jhu.edu":dkantor@jhu.edu} if you observe any
problems.

{title:Also see}
{help compress}, {help recast}, {help doubletofloat}, {help datatypes}