X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=doc%2Ftransformation.texi;h=9da42937ea62d7e69f806a473b5ded3d1491f9e7;hb=db7a0df40c17c140ab56e2e7dbabe8a6896cfd07;hp=03d697913676b280c0c9d676454e4a7797512835;hpb=5dbf5abcbed01f04422d4dead1c0ae0bb7efde4f;p=pspp diff --git a/doc/transformation.texi b/doc/transformation.texi index 03d6979136..9da42937ea 100644 --- a/doc/transformation.texi +++ b/doc/transformation.texi @@ -247,17 +247,39 @@ variables, @subcmd{INTO}, and a list of target variables. There must the same number of source and target variables. The target variables must not already exist. -By default, increasing values of a source variable (for a string, this -is based on character code comparisons) are recoded to increasing values -of its target variable. To cause increasing values of a source variable -to be recoded to decreasing values of its target variable (@var{n} down -to 1), specify @subcmd{DESCENDING}. +@cmd{AUTORECODE} ordinarily assigns each increasing non-missing value +of a source variable (for a string, this is based on character code +comparisons) to consecutive values of its target variable. For +example, the smallest non-missing value of the source variable is +recoded to value 1, the next smallest to 2, and so on. If the source +variable has user-missing values, they are recoded to +consecutive values just above the non-missing values. For example, if +a source variables has seven distinct non-missing values, then the +smallest missing value would be recoded to 8, the next smallest to 9, +and so on. + +Use @subcmd{DESCENDING} to reverse the sort order for non-missing +values, so that the largest non-missing value is recoded to 1, the +second-largest to 2, and so on. Even with @subcmd{DESCENDING}, +user-missing values are still recoded in ascending order just above +the non-missing values. + +The system-missing value is always recoded into the system-missing +variable in target variables. + +If a source value has a value label, then that value label is retained +for the new value in the target variable. Otherwise, the source value +itself becomes each new value's label. + +Variable labels are copied from the source to target variables. @subcmd{PRINT} is currently ignored. The @subcmd{GROUP} subcommand is relevant only if more than one variable is to be recoded. It causes a single mapping between source and target values to -be used, instead of one map per variable. +be used, instead of one map per variable. With @subcmd{GROUP}, +user-missing values are taken from the first source variable that has +any user-missing values. If @subcmd{/BLANK=MISSING} is given, then string variables which contain only whitespace are recoded as SYSMIS. If @subcmd{/BLANK=VALID} is given then they @@ -313,7 +335,8 @@ When @cmd{COMPUTE} is specified following @cmd{TEMPORARY} @vindex COUNT @display -COUNT @var{var_name} = @var{var}@dots{} (@var{value}@dots{}). +COUNT @var{var_name} = @var{var}@dots{} (@var{value}@dots{}) + [/@var{var_name} = @var{var}@dots{} (@var{value}@dots{})]@dots{} Each @var{value} takes one of the following forms: @var{number}