SAS分配组并累积

Question

我有一个包含事件和时间列的数据集。我需要创建列 Group 和 Cumulative。我需要测量的是事件 'Event1_Stop' 直到出现 'Event1_Start' 的持续时间。最后一组应该总结时间，这意味着停止正在进行并且事件没有开始。我的数据样本是：

data have;
length Event ;
input Event $ Time;
datalines;
Event3_Start 0.2
Event2_Start 0.4
Event2_Stop 0.2 
Event1_Stop 0.2
Event3_Start 0
Event4_Start 0.5
Event3_Stop 0.2
Event1_Start 0
Event4_Stop 0
Event4_Stop 0
Event1_Stop 0.3
Event3_Start 0.3
Event1_Start 0
Event3_Start 0.4
Event3_Stop 0
Event1_Stop 0.2
Event3_Start 0.2
Event2_Start 0.4
run;

我需要得到的结果数据集是：

data have;
length Event ;
input Event $ Time Group Cumulative;
datalines;
Event3_Start 0.2 0 0
Event2_Start 0.4 0 0
Event2_Stop  0.2 0 0 
Event1_Stop  0.2 1 0.9
Event3_Start 0 1 0
Event4_Start 0.5 1 0
Event3_Stop  0.2 1 0
Event1_Start 0 0 0
Event4_Stop  0 0 0
Event4_Stop  0 0 0
Event1_Stop  0.3 2 0.6
Event3_Start 0.3 2 0
Event1_Start 0 0 0
Event3_Start 0.4 0 0
Event3_Stop  0 0 0
Event1_Stop  0.2 3 0.8
Event3_Start 0.2 3 0
Event2_Start 0.4 3 0
run;

感谢您的建议。问候。

Answer 1

感谢 SAS 论坛上的@mkeintz 提供的解决方案：

data stop_to_start (keep=group cumulative);
set have end=end_of_have;
group+(event='Event1_Stop');
if event='Event1_Stop' then cumulative=0;
cumulative+time;
if end_of_have or event='Event1_Start' ;
run;

data want;
set have;
if _n_=1 or event='Event1_Start' then group=0;
cumulative=0;
if event='Event1_Stop' then set stop_to_start;
run;

SAS分配组并累积

SAS assign group and accumulate

sas