Conversion of variable type 'double' to 'float' ------------------------------------------------
^doub2flt^ [varlist] [^, M^indiff(real)]
Description ------------
^doub2fit^ converts variables of type ^double^ to type ^float^ if the absolute difference between the double and float values is less than ^Mindiff^. The default value for ^mindiff^ is 0.001. Doub2flt is useful if a large number of variables are imported into Stata from another database in the double format and the double precision is not needed. Under this circumstance a large amount of memory or disk space may be wasted. ^doub2flt^ allows this space/memory to be recovered.
^doub2fit^ requires the modified ^recast^ program called ^recast2^.
Options --------
^mindiff(^real #^)^ specifies the difference between the float and double variables that cannot be exceeded. Only if the difference is less than this value will the conversion will take place. 0.001 is the default value for ^mindiff^.
Examples ---------
. gen double minus = -3.33
. gen double plus = 3.33
. gen double bignum = 1234567890
. describe
Contains data obs: 4 vars: 3 size: 112 (100.0% of memory free) ------------------------------------------------------------------------------- > - 1. minus double %10.0g 2. plus double %10.0g 3. bignum double %10.0g ------------------------------------------------------------------------------- > - Sorted by: Note: dataset has changed since last saved
. l
minus plus bignum 1. -3.33 3.33 1.235e+09 2. -3.33 3.33 1.235e+09 3. -3.33 3.33 1.235e+09 4. -3.33 3.33 1.235e+09
. ^doub2flt^
Conversion of type double to type float
2 of 3 double variable(s) converted to float
. describe
Contains data obs: 4 vars: 3 size: 80 (100.0% of memory free) -------------------------------------------------- 1. bignum double %10.0g 2. minus float %9.0g 3. plus float %9.0g -------------------------------------------------- Sorted by: Note: dataset has changed since last saved
. l
bignum minus plus 1. 1.235e+09 -3.33 3.33 2. 1.235e+09 -3.33 3.33 3. 1.235e+09 -3.33 3.33 4. 1.235e+09 -3.33 3.33
^doub2fit minus^ ^doub2fit minus, M(.125)^
Author --------
Fred Wolfe National Data Bank for Rheumatic Diseases fwolfe@southwind.net
Also see ---------
Recast, Recast2