正确使用宏在 sas 中子集数据并将它们附加到文件
subset data in sas using macro properly and append them to a file
我有一些数据集，我根据一些生物学文献，按照一些方法写了一些代码来清洗，然后我想把它分成白天和晚上（因为他们必须分开分析）。它有效，但现在我需要对整套文件执行此操作，这对于我想要一个一个处理的许多文件来说是一种方式。所以我现在正在尝试编写一个宏来为我将它分成白天和黑夜..
我的数据是这样的
Hour var1 var2 var3
1 123 90 100
2 122 99 108
...........
4 156 80 120
4 156 80 145
4 143 82 132
基本上晚上每小时有 1 个 obs 第 3 天。我也有很多天。
每个数据集被命名为 STUDYIDID#_first 或 STUDYID_ID#_last。我想为每个数据集生成四个数据集。
因此 MYID111_first 将创建：MYID111_first_day_var1、MYID111_first_day_var2、MYID111_first_night_var1 和 MYID111_first_night_var2。
然后我想将它们附加到 4 个数据集中：
MYID_A_first_day_var1、MYID_A_first_day_var2、MYID_A_first_night_var1 和 MYID_A_first_night_var2。
到目前为止我的代码：
%macro datacut(libname,worklib=work, grp = _A ,time1 = _night , time2 = _day type1 = _var1 , type2 = _var2);
%local num i;
proc datasets library=&libname memtype=data nodetails;
contents out=&worklib..temp1(keep=memname) data=_all_ noprint;
run;
data _null_;
set &worklib..temp1 end=final;
by memname notsorted;
if last.memname;
n+1;
call symput('ds'||left(put(n,8.)),trim(memname));
if final then call symput('num',put(n,8.));
run;
%do i=1 %to #
/* do the artifact removing method */
DATA &libname..&&ds&i;
SET &libname..&&ds&i;
PT_ID = '&ds&i' ;
IF var1< 60 OR var1> 230 then delete;
IF var2< 30 OR var2> 230 THEN delete;
IF var3< 60OR var3 > 135 THEN DELETE;
IF var2 > var1 then delete;
run;
/* get just the night values */
PROC SQL;
CREATE TABLE &libname..&&ds&i&time1 as
SELECT *
FROM &libname..&&ds&i
WHERE Hour BETWEEN 0 and 6 OR Hour BETWEEN 22 and 24
order by systolic
;
QUIT;
/* trim off the proper number of observations for variable 1 */
DATA &libname..&&ds&i&time1&type1;
SET &libname..&&ds&i&time1 end=eof;
IF _N_ =1 then delete;
if eof then delete;
run;
PROC append base= &libname..&&ds&time1&type1
data= &libname..&&ds&i&time1;
run;
QUIT;
%end;
%mend datacut;
%datacut(work)
现在初始数据步可以正常工作，但后面的数据步不会按计划重命名数据。我得到了一堆名为 Ds10_night_var1 的数据集，其中包含错误的字段名称（memtype、nodetails、data）
我收到警告：
WARNING: Apparent symbolic reference DS1_NIGHT not resolved.
NOTE: Line generated by the macro variable "TIME1".
1 work.&ds1_night
-
22
200
ERROR 22-322: Expecting a name.
ERROR 200-322: The symbol is not recognized and will be ignored.
NOTE: The SAS System stopped processing this step because of errors.
NOTE: PROCEDURE SQL used (Total process time):
real time 0.00 seconds
cpu time 0.00 seconds
WARNING: Apparent symbolic reference DS1_NIGHT_SYS not resolved.
22: LINE and COLUMN cannot be determined.
NOTE 242-205: NOSPOOL is on. Rerunning with OPTION SPOOL might allow recovery of the LINE and
COLUMN where the error has occurred.
ERROR 22-322: Syntax error, expecting one of the following: a name, a quoted string, /, ;,
_DATA_, _LAST_, _NULL_.
201: LINE and COLUMN cannot be determined.
NOTE: NOSPOOL is on. Rerunning with OPTION SPOOL might allow recovery of the LINE and COLUMN
where the error has occurred.
ERROR 201-322: The option is not recognized and will be ignored.
所以我想要我的文件和数据集的正确名称以实际包含数据，我不明白为什么他们不这样做。
如您所知，您将宏变量写成 & 后跟它的名称，可以选择后跟 .。有了这个 . 你可以显式地结束宏变量引用，所以你可以使用宏变量作为前缀，就像
%let prefix = fore;
Aspect = &prefix.Ground;
计算结果为 Aspect = foreGround;。这就是为什么
%let myLib = abc;
%let mymember = xyz;
data &myLib.&myMember;
是一个错误，因为它的计算结果为 data abcxyz;，您必须写成
data &myLib..&myMember;
** or as I prefer **;
data &myLib..&myMember.;
得到data abc.xyz;.
对于您需要宏变量来创建宏变量名称的情况，SAS 允许编写双符号 &&，其计算结果为单个 & 并继续计算，直到所有符号都被消耗。所以假设
%let i = 1;
%let ds1 = myData;
%let time = _nigth;
SAS 是这样计算的 &&ds&i&time1 :
&&ds&i&time1&ds1_night- 错误，因为未定义宏变量
ds1_night
SAS 是这样计算的 &&ds&i..&time1. :
&&ds&i..&time1.&ds1._nightmyData_night
我有一些数据集，我根据一些生物学文献，按照一些方法写了一些代码来清洗，然后我想把它分成白天和晚上（因为他们必须分开分析）。它有效，但现在我需要对整套文件执行此操作，这对于我想要一个一个处理的许多文件来说是一种方式。所以我现在正在尝试编写一个宏来为我将它分成白天和黑夜..
我的数据是这样的
Hour var1 var2 var3
1 123 90 100
2 122 99 108
...........
4 156 80 120
4 156 80 145
4 143 82 132
基本上晚上每小时有 1 个 obs 第 3 天。我也有很多天。
每个数据集被命名为 STUDYIDID#_first 或 STUDYID_ID#_last。我想为每个数据集生成四个数据集。 因此 MYID111_first 将创建：MYID111_first_day_var1、MYID111_first_day_var2、MYID111_first_night_var1 和 MYID111_first_night_var2。
然后我想将它们附加到 4 个数据集中： MYID_A_first_day_var1、MYID_A_first_day_var2、MYID_A_first_night_var1 和 MYID_A_first_night_var2。
到目前为止我的代码：
%macro datacut(libname,worklib=work, grp = _A ,time1 = _night , time2 = _day type1 = _var1 , type2 = _var2);
%local num i;
proc datasets library=&libname memtype=data nodetails;
contents out=&worklib..temp1(keep=memname) data=_all_ noprint;
run;
data _null_;
set &worklib..temp1 end=final;
by memname notsorted;
if last.memname;
n+1;
call symput('ds'||left(put(n,8.)),trim(memname));
if final then call symput('num',put(n,8.));
run;
%do i=1 %to #
/* do the artifact removing method */
DATA &libname..&&ds&i;
SET &libname..&&ds&i;
PT_ID = '&ds&i' ;
IF var1< 60 OR var1> 230 then delete;
IF var2< 30 OR var2> 230 THEN delete;
IF var3< 60OR var3 > 135 THEN DELETE;
IF var2 > var1 then delete;
run;
/* get just the night values */
PROC SQL;
CREATE TABLE &libname..&&ds&i&time1 as
SELECT *
FROM &libname..&&ds&i
WHERE Hour BETWEEN 0 and 6 OR Hour BETWEEN 22 and 24
order by systolic
;
QUIT;
/* trim off the proper number of observations for variable 1 */
DATA &libname..&&ds&i&time1&type1;
SET &libname..&&ds&i&time1 end=eof;
IF _N_ =1 then delete;
if eof then delete;
run;
PROC append base= &libname..&&ds&time1&type1
data= &libname..&&ds&i&time1;
run;
QUIT;
%end;
%mend datacut;
%datacut(work)
现在初始数据步可以正常工作，但后面的数据步不会按计划重命名数据。我得到了一堆名为 Ds10_night_var1 的数据集，其中包含错误的字段名称（memtype、nodetails、data）
我收到警告：
WARNING: Apparent symbolic reference DS1_NIGHT not resolved.
NOTE: Line generated by the macro variable "TIME1".
1 work.&ds1_night
-
22
200
ERROR 22-322: Expecting a name.
ERROR 200-322: The symbol is not recognized and will be ignored.
NOTE: The SAS System stopped processing this step because of errors.
NOTE: PROCEDURE SQL used (Total process time):
real time 0.00 seconds
cpu time 0.00 seconds
WARNING: Apparent symbolic reference DS1_NIGHT_SYS not resolved.
22: LINE and COLUMN cannot be determined.
NOTE 242-205: NOSPOOL is on. Rerunning with OPTION SPOOL might allow recovery of the LINE and
COLUMN where the error has occurred.
ERROR 22-322: Syntax error, expecting one of the following: a name, a quoted string, /, ;,
_DATA_, _LAST_, _NULL_.
201: LINE and COLUMN cannot be determined.
NOTE: NOSPOOL is on. Rerunning with OPTION SPOOL might allow recovery of the LINE and COLUMN
where the error has occurred.
ERROR 201-322: The option is not recognized and will be ignored.
所以我想要我的文件和数据集的正确名称以实际包含数据，我不明白为什么他们不这样做。
如您所知，您将宏变量写成 & 后跟它的名称，可以选择后跟 .。有了这个 . 你可以显式地结束宏变量引用，所以你可以使用宏变量作为前缀，就像
%let prefix = fore;
Aspect = &prefix.Ground;
计算结果为 Aspect = foreGround;。这就是为什么
%let myLib = abc;
%let mymember = xyz;
data &myLib.&myMember;
是一个错误，因为它的计算结果为 data abcxyz;，您必须写成
data &myLib..&myMember;
** or as I prefer **;
data &myLib..&myMember.;
得到data abc.xyz;.
对于您需要宏变量来创建宏变量名称的情况，SAS 允许编写双符号 &&，其计算结果为单个 & 并继续计算，直到所有符号都被消耗。所以假设
%let i = 1;
%let ds1 = myData;
%let time = _nigth;
SAS 是这样计算的 &&ds&i&time1 :
&&ds&i&time1&ds1_night- 错误，因为未定义宏变量
ds1_night
SAS 是这样计算的 &&ds&i..&time1. :
&&ds&i..&time1.&ds1._nightmyData_night