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load train;
load test;

id_trn = train(:,1);     £¨ÑµÁ·¼¯µÄµÚ1ÁÐΪѵÁ·¼¯Ñù±¾µÄ±àºÅ£©
id_tst = test(:,1);       £¨²âÊÔ¼¯µÄµÚ1ÁÐΪ²âÊÔ¼¯Ñù±¾µÄ±àºÅ£©

x_trn = train(:,[2:4]);         £¨ÑµÁ·¼¯µÄµÚ2ÁС«4ÁÐΪѵÁ·¼¯Ñù±¾µÄÌØÕ÷±äÁ¿X1£¬X2£¬X3£©
x_tst = test(:,[2:4]);            £¨²âÊÔ¼¯µÄµÚ2ÁС«4ÁÐΪ²âÊÔ¼¯Ñù±¾µÄÌØÕ÷±äÁ¿X1£¬X2£¬X3£©

y_trn = train(:,5);                 £¨ÑµÁ·¼¯µÄµÚ5ÁÐΪѵÁ·¼¯Ñù±¾µÄÀà±ð£©
y_tst = test(:,5);                  £¨²âÊÔ¼¯µÄµÚ5ÁÐΪ²âÊÔ¼¯Ñù±¾µÄÀà±ð£©

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[xPre_trn,xPre_tst] = predata('standardize',[],x_trn,x_tst);    £¨¶ÔѵÁ·¼¯ºÍ²âÊÔ¼¯µÄÌØÕ÷±äÁ¿½øÐбê×¼»¯£©
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