Question

所以，我想基于公共标识符（在下表中，字段'IWUP'）对表中的值求和的方法。我的表看起来像这样：

+--------------------+--------------------+--------------------+--------------------+
|IWUP                |Site                |Date                |PPG
+--------------------+--------------------+--------------------+--------------------+
|1985001             |1234                |01/01/2012          | .03                |
|1985001             |1235                |01/01/2012          | .23                |
|1985001             |1236                |01/01/2012          | .35                |
|1985001             |1234                |01/02/2012          | .03                |
|1985001             |1235                |01/02/2012          | .03                |
|1985001             |1236                |01/02/2012          | .03                |
|1985001             |1234                |01/03/2012          | .03                |
|1985001             |1235                |01/03/2012          | .03                |
|1985001             |1236                |01/03/2012          | .03                |

这是由一些arcpy代码生成的临时表：

arcpy.MakeTableView_management(PUMPAGE_PPG_DATA, PPG_DATA_View, "IWUP =1985001", "", "IWUP; SITE; DATE; PPG")

我想总结每个网站和月份的PPG数据并生成如下内容：

 +--------------------+--------------------+----------------------------+
 |IWUP                |Date                |PPG
 +--------------------+--------------------+----------------------------+
 |1985001             |01/02/2012          |SUM(Sites 1234, 1235, 1236) |          
 |1985001             |01/03/2012          |SUM(Sites 1234, 1235, 1236) |   
 |1985001             |01/04/2012          |SUM(Sites 1234, 1235, 1236) |

然后我可以绘制

x = []
y = []
fig = plt.figure()
table = QUERY
fields = ["Date", "PPG"]
with arcpy.da.SearchCursor(table, fields) as rows:
for row in rows:
        x.append(row[0])
        y.append(row[1])


plt.plot(x,y, marker='o', linestyle='-', color='b')
plt.show()

Answer 1

您应该将Spatial Statistics与PPG一起用作statistics_field，将IWUP和日期用作case_fields：arcpy.Statistics_analysis(in_table, out_table, [["PPG", "SUM"]], ["IWUP", "Date"])

ArcGIS / Python：如何基于公共ID对行进行求和

1 个答案: