merci.

谢谢

在后面加,sig就可以了。

thanks.

谢谢

谢谢，这贴很有用！

太感谢了

都是高手，感谢了

学习了~

谢谢

pwcorr x1 x2,sig 标示显著性
pwcorr x y, sig star(.05) 在5%的显著水平下加星标

楼上正解，补充一下code，假设看weight，iq，age三者的相关系数，
pwcorr weight iq age, obs sig
即可得到sample size和P值

问题在于：两组变量之间有相关性吗？散点图看不出两者之间有关联性的两组变量corr也能计算出相关性系数,pwcorr计算出概率大小，这样对吗？是不是只要是两组数据，corr都能计算出相关系数且pwcorr给出概率？

pwcorr x1 x2 x3计算出的是相关系数，还是相关系数的概率？

请问，pwcorr y x1 x2 x3,sig 中得出的相关性系数是y分别与想x1、x2、x3的相关性系数，还是与x1、x2、x3联合后的相关性系数？

The differ with respect to the way they deal with missing values. To
compute a correlation you just need two variables, so if you ask for a
matrix of correlations you could just do so by looking at each pair of
variables separately and inlcude all observations that contain valid
values for that pair. Alternatively, you could say that the entire
list of variables defines your sample, in that case would first remove
all observations that contain a missing value on any of the variables
in the list of variables. -pwcorr- does the former and -corr- does the
latter. In the example below, the variable rep78 is the only variable
with missing values. So -corr- will compute the correlation between
price and trunk on only those observations with valid values on rep78
price and trunk, while -pwcorr- will compute the correlation between
price and trunk on those observations with valid values on price and
trunk. You can use the -if- condition to let -pwcorr- behave like
-corr-.

*------------------ begin example ------------------
sysuse auto

// only rep78 contains missing values
corr rep78 price trunk
pwcorr rep78 price trunk

// reproduce the results from -corr- with -pwcorr-:
pwcorr rep78 price trunk if !missing(rep78, price, trunk)

按您这样说，命令corr用于计算一组变量间的协方差或相关系数矩阵； 命令pwcorr可用于计算一组变量中两两变量的相关系数，同时还可以对相关系数的显著性进行检验； 那么都可以求相关系数被，那么楼主为什么说二者结果不同呢。。。望指点迷津

按您这样说，命令corr用于计算一组变量间的协方差或相关系数矩阵； 命令pwcorr可用于计算一组变量中两两变量的相关系数，同时还可以对相关系数的显著性进行检验； 那么都可以求相关系数被，那么楼主为什么说二者结果不同呢。。。望指点迷津

correlate 和 pwcorr都可以计算相关系数，只是correlate在计算的时候是按照案例删除法来计算的，而pwcorr则不是。案例删除的意思是在计算相关系数的时候，是计算所有变量共有的观测值。因此，如果你的数据存在缺失值，correlate和pwcorr的计算结果应该是不一样的。

在后面加上sig ，默认p的临界值是0.05

谢谢您的回答！我想追问一下，如果数据的确存在缺失值，corr和pwcorr结果不同，应该以哪个为准？

请问，意思是 cor 不管后面加什么命令，都无法显示显著性水平是吧？

corr By default, correlations are computed based on the number of rows with non-missing data for the variables listed after the corr command (listwise deletion of missing data). The pwcorr command can be used to request that correlations be computed in a pairwise fashion, meaning that all of the available data for each pair of variables will be used to compute the correlation. This means that a different number of observations may be used in the calculation of the correlation coefficients for each pair of variables.