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The following SAS program is submitted:
ods output Chisq(match_all) = Work.Pvalues (where = (statistic eq "Chi-squre"));
proc freq data = work.endpt;
      tables Endpt1 * Treat / chisq;
      tables Endpt2 * Treat / chisq;
run;
ods output close;

How many datasets are created and how many observations are in the datasets?
A. 1 data set named Pvalues and 1 observation
B. 1 data set named Pvalues and 2 observations
C. 2 data sets named Pvalues, Pvalues1 and each with 1 observation
D. 2 data sets named Pvalues1, Pvalues2 and each with 2 observation
答案是C.请教各位大大，为什么输出两个数据集，命名规则在哪个资料里可以找到呢？

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关键词：observations observation statistic following observat

俺同问

match_all选项告诉sas将每一个输出对象单独各自存一张表，所以是2个数据集。数据集命名规则就是xx，xx1，……xx若用户没指定就用xx=data