Mata is a component of Stata. It is a matrix programming language that can be used interactively or as an extension for do-files and ado-files. Thus 1. Mata can be used by users who want to think in matrix terms and perform (not necessarily simple) matrix calculations interactively, and...
matrix F = (3\6\2) matrix list F #matrix is associative (A + B) + C = A +( B + C) matrix A = (7, -2\3,4\5,3) matrix B = (1,4\6,5\0,3) matrix C = (1,4\2,5\3,8) matrix D = (A + B) + C matrix list D matrix E = A + (B + C) matrix list E ...
matrix myV=e(V) after running thebscommand, the matrix that is saved is not the variance–covariance matrix for my model (i.e., the diagonal of this matrix does not contain the square of the standard errors of the coefficients that are reported in the output). How can I retrieve the ...
Stata has a powerful matrix language called Mata that contains hundreds of functions. Below, we list some basic matrix functions that are provided within Stata. All of the same functionality, and more, is provided in Mata too. Mata is included with Stata. Determinant of matrix Trace of matri...
1. Mata can be used by users who want to think in matrix terms and perform (not necessarily simple) matrix calculations interactively, and 2. Mata can be used by advanced Stata programmers who want to add features to Stata. Mata has something for everybody. ...
graph matrix price mpg weight length,half by( foreign,total col(1) ) (根据foreign变量的不同类型绘制price等四个变量的散点图矩阵,要求绘出总图,并上下排列】=具) 其他图形: graph box y,over(x) yline(.22) (对应x的每一个取值构建y的箱型图,并在y轴的0.22处划一条水平线) ...
Let X be the matrix of regressors (say, y2, y3, z3, z4, where y2 and y3 are endogenous and z3 and z4 are exogenous). Let y be the endogenous variable of interest. That is, we want to estimate b, where y = Xb + error ...
e(V_leads_lags) variance-covariance matrix of leads and lags estimators 4、案例应用 我们现在提供了许多实例来说明eventdd的性能,以估计在经验应用中的面板事件研究。 我们使用Stevenson and Wolfers (2006)关于美国无过错离婚改革和女性自杀的数据。这些数据已在其他论文中使用,以证明双向固定效应模型最近进展的功...
I want to show you a way of picturing and thinking about matrices. The topic for today is the square matrix, which we will callA. I’m going to show you a way of graphing square matrices, although we will have to limit ourselves to the 2x2 case. That will be, as they say, withou...
mm_sqrt(): square root of a symmetric positive definite matrix mm_plot(): Draw twoway plot _mm_plot(): Draw twoway plot mm_group(): create group index _mm_group(): create group index, without sorting mm_panels(): identify nested panel structure ...