SAS label 和值的互相转换

将A的label赋值给中间变量，再将中间变量的值当做B的label

data a;
a1='我是a1';
b1='我是b1';

call symput("y",tranwrd(vlabel(a1),"的label",""));
label a1='我是A1的label' b1="&&y";
run;