我想使用PCRXFIND代替prxmatch复制此文件,以提高速度,因为prxmatch无法正常工作。
我正在尝试在数据文件中查找文本。这是一个可重现的示例。一个文件包含要搜索的数据,另一个文件包含搜索词。我想使用正则表达式。通常,这是通过prxmatch完成的。我想使用PCRXFIND来完成此操作,因为我正在DS2内部工作。我使用哈希迭代器来遍历搜索词或数据集中的每个观察值。
搜索结果未遵循我可以识别的任何模式。我很乐意提供任何建议。我在没有结果的sas社区上发布了此内容。
* ds2 PCRXFIND example;
data person;
input name $ dept $;
datalines;
John Sales
Mary Acctng
Joe Findme
Sue Hereiam
;
run;
data searchterms;
infile datalines missover;
input s_index $ term $;
datalines;
1 Hereiam
2 Findme
3 Acc
;
run;
proc contents data=searchterms; run;
proc print data=searchterms; run;
proc ds2;
data search_results (overwrite=yes);
dcl double rc c ;
declare char(8) s_index;
declare char(8) term;
declare char(11) name dept;
declare char(1) c_options;
declare char(20) search_term search_text;
dcl package hash h(1, '{select s_index, term from searchterms}');
dcl package hiter hi('h');
method init();
c_options = 'i';
rc = h.defineKey('s_index');
rc = h.defineData('term');
rc = h.defineDone();
end;
method run();
dcl double rc;
set {select name, dept from person};
rc = hi.first();
do while(rc=0);
c = prxmatch('/'||compress(term)||'/i',name||' '||dept);
search_term = '/'||compress(term)||'/i';
search_text = name||' '||dept;
rc = hi.next();
output;
end;
end;
enddata;
run;
quit;
答案 0 :(得分:3)
在SAS 9.4M5中,添加了一个新包用于正则表达式匹配DS2 PCRXFIND Package。下面是使用该程序包和自定义列表对象程序包来完成任务的示例。
proc ds2;
package prxElement/overwrite=yes;
declare package prxElement next;
declare int id;
declare package pcrxfind prx;
method prxElement( int id,
varchar(32767) character set utf8 regex);
this.id = id;
prx = _new_ pcrxfind(regex);
end;
endpackage;
run;
package prxList/overwrite=yes;
declare package prxElement head;
declare int count;
method prxList();
head = null; *null is an empty list;
count = 0;
end;
method last() returns package prxElement;
declare package prxElement item;
item = head;
do while ( ^null(item.next) );
item = item.next;
end;
return item;
end;
method add(package prxElement element);
if ( ^null(head) ) then do;
declare package prxElement joinTo;
joinTo=last();
joinTo.next = element;
count = count+1;
end;
else do;
head = element;
count = 1;
end;
end;
endpackage;
run;
data results(overwrite=yes);
declare double rc;
drop term;
declare package pcrxfind prx;
declare package prxElement item;
declare package prxList prxList;
method init();
declare int i;
prxList=_new_ prxList();
do i=1 to &termdim;
set searchterms;
item=_new_ prxElement(s_index,cats('/',term,'/i'));
prxList.add(item);
end;
end;
method run();
declare int i;
set person;
item = prxList.head;
do i=1 to prxList.count;
prx = item.prx;
s_index = item.id;
rc = (prx.Match(catx(' ',name,dept)))>0 ;
output;
item=item.next;
end;
end;
enddata;
run;
quit;
答案 1 :(得分:1)
我还没有使用过DS2,所以对代码没有多少了解,但是您可以在proc sql中的联接条件下简单地进行操作。像下面这样
proc sql;
create table want as
select distinct t1.*
from person T1
INNER JOIN searchterms t2
ON find(t1.dept,trim(t2.term) ) > 0;
答案 2 :(得分:1)
看起来不错。我不是100%知道为什么您的书不起作用,但是通常当您对周围空间不够谨慎时,发生的事情并不总是有意义的。
我使用CATS
和CATX
进行串联,这似乎是处理字符串组合的最有用的方法。我还转移了输出内容,并使用了c_options。
data person;
input name $ dept $;
datalines;
John Sales
Mary Acctng
Joe Findme
Sue Hereiam
;
run;
data searchterms;
infile datalines missover;
input s_index $ term $;
datalines;
1 Hereiam
2 Findme
3 Acc
;
run;
proc contents data=searchterms; run;
proc print data=searchterms; run;
proc ds2;
data search_results (overwrite=yes);
dcl double rc c ;
declare char(8) s_index;
declare char(8) term;
declare char(11) name dept;
declare char(1) c_options;
declare char(20) search_term search_text;
dcl package hash h(1, 'searchterms');
dcl package hiter hi('h');
method init();
c_options = 'i';
rc = h.defineKey('s_index');
rc = h.defineData('term');
rc = h.defineDone();
end;
method run();
dcl double rc;
set person;
rc = hi.first();
do while(rc=0);
search_term = cats('/',term,'/',c_options);
search_text = catx(' ',name,dept);
c = prxmatch(search_term, search_text);
output;
rc = hi.next();
end;
end;
enddata;
run;
quit;
proc print data=search_results;
run;