回归分析论文
21.8 1926
22.3 1927
21.7 1928
22.5 1929
21.2 1930
;
proc reg;
model wendu=nianfen;
print cli;
plot wendu*nianfen p.*nianfen l95.*nianfen u95.*nianfen/overlay; symbol1c=black v=triangle;
symbol2c=blue v=circle;
symbol3c=green v=square;
symbol4c=red v=star;
run;
程序（3）：
data ch;
input wendu nianfen @@;
cards;
23.6 1931
20.5 1932
21.3 1933
22.2 1934
22.1 1935
19.4 1936
21.7 1937
21.1 1938
21.8 1939
22.2 1940
22.2 1941
21.4 1942
20.3 1943
21.8 1944
21.2 1945
20.7 1946
21.1 1947
21.8 1948
21.7 1949
21.6 1950
20.5 1951
21.7 1952
22.7 1953
21.4 1954