Spotfire 如何沿一列进行计算

Question

我有一个数据 table，因为 below.I 想创建一个名为 "Time Difference" 的新列，它捕获 [STAGE] 开始和 [STAGE] 结束之间的时间差。有没有不用数据转换的方法呢？

谢谢！

Answer 1

假设每个 ID 都是唯一的，并且您的数据按 Time 排序，其中 Stage = Start 是每个 ID 的第一行，Stage = End 是每个ID的最后一行，你可以使用这个：

Concatenate(Min([Time]) OVER ([ID]),"-",Max([Time]) over ([ID]))

结果

+----+---------+---------+------+-----------------+
| ID |  Stage  | Action  | Time | Time Difference |
+----+---------+---------+------+-----------------+
|  1 | Start   | approve | A    | A-F             |
|  1 | Process | approve | B    | A-F             |
|  1 | Process | approve | C    | A-F             |
|  1 | Process | approve | D    | A-F             |
|  1 | Process | decline | E    | A-F             |
|  1 | End     | approve | F    | A-F             |
|  2 | Start   | approve | G    | G-I             |
|  2 | Process | decline | H    | G-I             |
|  2 | End     | approve | I    | G-I             |
+----+---------+---------+------+-----------------+

如果您的数据尚未排序，您可以应用 Rank() 来解决此问题。如果是这样，请告诉我。

EDIT WITH NEW DATA

表达式

Concatenate(Min(If((Upper([Stage])="START") and (Upper([Action])="APPROVE"),Max([Time]) OVER ([ID]))) OVER ([ID]),"-",Min(If((Upper([Stage])="END") and (Upper([Action])="APPROVE"),Max([Time]) OVER ([ID]))) OVER ([ID]))

简化

Concatenate(Min(If((Upper([Stage])="START") and (Upper([Action])="APPROVE"),[Time])) OVER ([ID]),"-",Min(If((Upper([Stage])="END") and (Upper([Action])="APPROVE"),[Time])) OVER ([ID]))

结果

+----+---------+---------+------+-----------------+
| ID |  Stage  | Action  | Time | Time Difference |
+----+---------+---------+------+-----------------+
|  1 | On hold | decline | A    | C-H             |
|  1 | Start   | decline | B    | C-H             |
|  1 | Start   | approve | C    | C-H             |
|  1 | Process | DECLINE | D    | C-H             |
|  1 | Process | approve | E    | C-H             |
|  1 | Process | approve | F    | C-H             |
|  1 | End     | decline | G    | C-H             |
|  1 | End     | approve | H    | C-H             |
|  2 | Start   | approve | I    | I-K             |
|  2 | Process | decline | J    | I-K             |
|  2 | End     | approve | K    | I-K             |
+----+---------+---------+------+-----------------+

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