我有兩列的表(代碼:chararray,SP:雙)柱分裂成使用豬拉丁組
我想基於像條件來劃分第二場SP分成不同的組(例如(< 25),(> 25 < 45),(> = 45)
INPUT
code sp
t001 60.0
t001 75.0
a003 34.0
t001 60.0
a003 23.0
a003 23.0
t001 45.0
t001 10.0
t001 8.0
a003 20.0
t001 38.0
a003 55.0
a003 50.0
t001 08.0
a003 44.0
期望的輸出:
code bin1 bin2 bin3
(<25) (>25 <45) >=45
t001 3 1 4
a003 3 2 2
我想劇本象下面這樣:
data = LOAD 'Sandy/rd.csv' using PigStorage(',') As (code:chararray,sp:double);
data2 = DISTINCT data;
selfiltnew = FOREACH data2 generate code, sp;
group_new = GROUP selfiltnew by (code,sp);
newselt = FOREACH group_new GENERATE selfiltnew.code AS code,selfiltnew.sp AS sp;
bin1 = filter newselt by sp < 25.0;
grp1 = FOREACH bin1 GENERATE newselt.code AS code, COUNT(newselt.sp) AS (sp1:double);
bin2 = filter newselt by sp < 45 and sp >= 25;
grp2 = FOREACH bin3 GENERATE newselt.code AS code, COUNT(newselt.sp) AS (sp2:double);
bin3 = filter newselt by sp >=75;
grp3 = FOREACH bin3 GENERATE newselt.code AS code, COUNT(newselt.sp) AS (sp3:double);
newbin = JOIN grp1 by code,grp2 by code,grp3 by code;
newtable = FOREACH newbin GENERATE grp1::group.code AS code, SUM(sp1) AS bin1,SUM(sp2) AS bin2,SUM(sp3) AS bin3;
data2 = FOREACH newtable GENERATE code, bin1, bin2, bin3;
dump newtable;
如何使用隱語我得到正確的輸出?
請指明您的腳本有什麼問題,您得到的是什麼,而不是預期的結果 – YakovL
@YakovL - 錯誤是在grp1 = FOREACH bin1 GENERATE newselt.code AS代碼,COUNT(newselt.sp)AS(sp1:double) ;在這裏,我想計算所有那些低於25的sp的計數。我得到以下錯誤:無法推斷org.apache.pig.builtin.COUNT的匹配函數爲多個或不匹配。請使用明確的演員。 – sandy
我不確定,這個邏輯是否好。有沒有什麼最好的解決方案可以分成垃圾箱? – sandy