unknown function sqr() r(133); . display sqrt(10) 3.1622777 或者,试试用 twoway function 画点图。 . twoway function clip(x, 0.2, 0.8) . twoway function chop(x, 1), ra(0 10) 第三,在代码书写时手动布局。逗号后和运算符周围的空格通常会使代码更具可读性。 gen x=1*2+3/4-sqrt(5)...
//但是这样做会报错: unknown egen function medium() //正确的做法是: egen x_p50 = pctile(x), p(50) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. stata怎么求指定时间段的均值 bysort Stkcd: egen mean5_loan = mean(loan_ratio) if Year>=2000 & Year <=2006 1. 面板数据向下填充 //在...
考虑以下示例代码: clear set obs 20 generate t = 2000 + _n tsset t, yearly tsappend, last(2025) tsfmt(ty) 这将崩溃,并显示以下错误: unknown function ty() r(133); 但是,根据的说法,应该支持tsfmt选项的ty参数(即使在Stata中实际上没有ty()函数)。 我知道我可以通过一些数学运算和tsapp...
stata中如何先生成一个变量的中值,再根据这个中值进行分组生成虚拟变量,大于等于中值的取值为1,否//第一反应代码如下: egen loan_ratio_med = medium(loan_ratio) //但是这样做会报错: unknown egen function medium() //正确的做法是: egen x_p50 = pctile(x), p(50)stata怎么求指定 Stata里test是什么...
gen logit(x)(取ln[x/(1-x)]) gen x=autocode(x,n,xmin,xmax)(将x的值域,即xmax-xmin,分为等距的n份) gen x=cond(x1>x2,x1,x2)(若x1>x2成立,则取x1,若x1>x2不成立,则取x2) sort x gen gx=group(n)(将经过排序的变量x分为尽量等规模的n个组) ...
S456986 RCSGEN: Stata module to generate restricted cubic splines and their derivatives byPaul Lambert S456985 PWCORR2: Stata module to compute pairwise correlations and return results byChristopher F Baum S456984 OUTFIXT: Stata module to write fixed-format text file ...
Problems: Non-linearity & unknown interaction effects High-dimensionality: we might have "many" controls We don't know which controls to include 2 / 25 Background Motivating example. The partial linear model: yi = θdi + g (xi ) +εi . causal part nuisance Post-double selection (Belloni...
1、生成一个自变量和一个因变量。2、点击Statistics|linear model and related|linear regression菜单。3、在弹出的regress中设置相关变量，然后再点确定。4、在结果界面中，_cons为.5205279表示回归截距，说明回归方程具有统计学意义。R-squared和Adj R-squared分别为0.9905和0.9893，说明回归方程拟合效果...
gen(estsizevar) creates the variable estsizevar containing the estimated sizes of the growth function determined. linf(#) is not optional. The L1 value can be retrieved from fordwal or gullplot. nl options are the options in Stata's nl command. Case 1. Length frequency analysis To ...
第一个不清楚，你再试试 第二个用bys id year: egen v2=sum(v1)