如果变量名或宏变量使用不当(如包含非法字符、未正确定义等),也可能导致invalid syntax错误。 解决方案:确保变量名和宏变量遵循Stata的命名规则,并在使用前已正确定义。 循环或条件语句错误: 在使用forvalues、if、foreach等循环或条件语句时,如果语法不正确或条件表达式有误,也可能导致invalid syntax错误。 解决方案...
1.2 forvalues Loop over consecutive values forvalues 只能用于数值的循环 *Synax forvalues lname = range { Stata commands referring to `lname' } 对于while中方程求解例子,我们也可以用forvalues来做,假如我们猜到解在1-3范围内 forvalues x_est = 1(0.0001)3{ if abs(`x_est' ^ 2 - 4 * `x_es...
forvalues i = 1/$N{ cap qui reg `y' `x' if (ind_year==`i') cap qui predict e if e(sample), res cap qui replace AB`y' = e if e(sample) drop e } local y "disexp" global y `y' local x "invA Lsale" global x `x' cap drop AB`y' gen AB`y' = . forvalues i =...
My syntax which comes from Stata 9 is the following: forvalues svy = 1/`max1' { use "'allsvys'", clear keep if i==`svy' } and I get the following error : invalid syntax r(198); Subsequently, i would also like to run the following syntax (shortened for convenience) foreach x ...
STEP4,生成虚拟DID变量之后,就可以用虚拟DID进行回归分析了。为了使得结果更具说服力,将这一过程重复500次、甚至更多次。这就是循环语句forvalues i=1/500的意义所在。 STEP5,做了500次回归,每个回归方程都有一个系数、p值、标准误,我们需要把这500个相关数据放在一起分析它们的规律。这就是代码中mat -[---]...
forvalues bot = 20(5)45 { local top = `bot' + 4 gen age`bot'to`top' = age >= `bot' & age <= `top' } 1. 2. 3. 4. 这将创建一组虚拟变量age20to24到age45to49。循环时,暂元bot将以5为步长在20和45范围内取值表示年龄组的下限(即20,25,30,35,40和45)。
forvalues i = 1/`=_N' { replace x = y + z in `i' } because this would be very slow by comparison. Similarly, you should always try first to find a vectorized solution for whatever you are calculating. Still, loops over the observations are sometimes unavoidable and often occur in...
forvalues 程序示例: * begin forvalues i=1/5 { display `i’ //和上一个命令完全等价,只是写法更简洁 } * end 68 :7 流程语句 程序示例 3 : * begin forvalues i=4 (-0.2) 0{ //起始值可大于终值,但步长应为负,步长可为小数 display `i’ } * end 用 forvalues 做循环时,其命令格式为 ...
14. Existing function has new syntax , which clears (drops) all Stata matrices, as distinguished from , which drops all Mata matrices and functions. See [D] clear. 15. These days, commands intended for use by end-users are often being used as subroutines by other end-user commands. Some...
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