SAS 中的四分位数包括不正确的观察次数

Question

我正在尝试使用以下代码计算 SAS 代码中数据的四分位数：

PROC RANK data = final_states out = final_states percent;
    var poverty_rate;
    ranks pov_percentile;
    var semi_poverty_rate;
    ranks semi_pov_percentile;
RUN;

/*Create quartiles for poverty percentiles*/
DATA final_states; 
    set final_states;
    if pov_percentile <= 25 then pov_quart = 1;
    else if pov_percentile > 25 and pov_percentile <= 50 then pov_quart = 2;
    else if pov_percentile > 50 and pov_percentile <= 75 then pov_quart = 3;
    else pov_quart = 4;
RUN;

运行代码后，我使用以下命令运行了一个制表命令：

PROC FREQ final_states;
    tables pov_quart;
RUN;

我得到了以下结果：

pov_quart  Frequency
1          865
2          785
3          785
4          785

产生这些结果的代码有问题吗？

Answer 1

检查是否丢失。

DATA final_states; 
    set final_states;
    if not missing(pov_percentile) then do;
       if pov_percentile <= 25 then pov_quart = 1;
       else if pov_percentile > 25 and pov_percentile <= 50 then pov_quart = 2;
       else if pov_percentile > 50 and pov_percentile <= 75 then pov_quart = 3;
       else pov_quart = 4;
       end;
RUN;