换一个命名。出现variablealreadydefined这个问题,是因为state会直接将运行得出的结果保留在数据表格中,如果再次运行的时候定义了相同名称的变量,会使得表格出现相同的列名。所以只需要在表格中将原来的定量名字进行修改,或者换一个命名即可。
输出成一个变量最麻烦,需要用到两个命令:st_addvar()和st_store()。比如mata中有一个矩阵N*K的矩阵Y,现在将其输出到Stata中,类型为“long”,并取名为X1,X2,...,XK。比如K=3,那么就要这么操作: index=st_addvar("long",("X1","X2","X3")) st_addobs(rows(Y)) st_store((1,rows(Y)),index...
As was already noted for the dual-modulus prescaler, B must be greater than or equal to A for the dual modulus prescaler to work. From these we can say that the smallest division ratio possible while being able to increment in discrete integer steps is: NMIN = (BMIN × P) + AMIN =...
Minnik Findik posted on Monday, February 15, 2016 - 4:05 am Hi Linda, Yes when I remove the WITH statement, I do not get that message. However, I do want/need to declare the correlation between those variables. Can I do it in any other way so I will not get a warning? Or ...
Let X and Y be independent random variables with the same geometric distribution a. Let U = min(X, Y) and V = X-Y. Show that V and V are, surprisingly, independent. b. Consider g(x, y) = x/(x + y). Let X be exponentially distributed with varian...