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Merge results after selections using loop

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}

-1

I want to merge shapefiles after selection inside a loop but could not run my codes. Here are my codes.

count = 0

selecationmerge = ""

for selection in selections:

    count = count + 1

    selectionname = "stats27171wqi_Conlevel" + str(count)

    print selectionname

    arcpy.SelectLayerByAttribute_management('wqi_Conshp_clip27171','NEW_SELECTION',selection)

    arcpy.Statistics_analysis('wqi_Conshp_clip27171',selectionname,[["Shape_Area","sum"]])

    arcpy.AddField_management(selectionname,'rate','DOUBLE')

    arcpy.CalculateField_management(selectionname,'rate','!SUM_Shape_Area!/{}'.format(Sum_Area27171),'PYTHON_9.3') 



    arcpy.Merge_management([selecationmerge,selectionname], selecationmerge)

And the error messages are shown below.

ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Datasets: Dataset '';D:/STAR/assignment/assignment7/Zhenyu_Assign7_GISpro/Zhenyu_Assign7_GISpro.gdbstats27171wqi_Conlevel1 does not exist or is not supported
ERROR 000735: Output Dataset: Value is required
Failed to execute (Merge).

I believe the last line of my codes is the problem but I have no idea how to fix this.

arcgis-10.0 for-loop

share|improve this question

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1

add a comment | 

-1

I want to merge shapefiles after selection inside a loop but could not run my codes. Here are my codes.

count = 0

selecationmerge = ""

for selection in selections:

    count = count + 1

    selectionname = "stats27171wqi_Conlevel" + str(count)

    print selectionname

    arcpy.SelectLayerByAttribute_management('wqi_Conshp_clip27171','NEW_SELECTION',selection)

    arcpy.Statistics_analysis('wqi_Conshp_clip27171',selectionname,[["Shape_Area","sum"]])

    arcpy.AddField_management(selectionname,'rate','DOUBLE')

    arcpy.CalculateField_management(selectionname,'rate','!SUM_Shape_Area!/{}'.format(Sum_Area27171),'PYTHON_9.3') 



    arcpy.Merge_management([selecationmerge,selectionname], selecationmerge)

And the error messages are shown below.

ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Datasets: Dataset '';D:/STAR/assignment/assignment7/Zhenyu_Assign7_GISpro/Zhenyu_Assign7_GISpro.gdbstats27171wqi_Conlevel1 does not exist or is not supported
ERROR 000735: Output Dataset: Value is required
Failed to execute (Merge).

I believe the last line of my codes is the problem but I have no idea how to fix this.

arcgis-10.0 for-loop

share|improve this question

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1

add a comment | 

I want to merge shapefiles after selection inside a loop but could not run my codes. Here are my codes.

count = 0

selecationmerge = ""

for selection in selections:

    count = count + 1

    selectionname = "stats27171wqi_Conlevel" + str(count)

    print selectionname

    arcpy.SelectLayerByAttribute_management('wqi_Conshp_clip27171','NEW_SELECTION',selection)

    arcpy.Statistics_analysis('wqi_Conshp_clip27171',selectionname,[["Shape_Area","sum"]])

    arcpy.AddField_management(selectionname,'rate','DOUBLE')

    arcpy.CalculateField_management(selectionname,'rate','!SUM_Shape_Area!/{}'.format(Sum_Area27171),'PYTHON_9.3') 



    arcpy.Merge_management([selecationmerge,selectionname], selecationmerge)

And the error messages are shown below.

ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Datasets: Dataset '';D:/STAR/assignment/assignment7/Zhenyu_Assign7_GISpro/Zhenyu_Assign7_GISpro.gdbstats27171wqi_Conlevel1 does not exist or is not supported
ERROR 000735: Output Dataset: Value is required
Failed to execute (Merge).

I believe the last line of my codes is the problem but I have no idea how to fix this.

arcgis-10.0 for-loop

share|improve this question

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1

count = 0

selecationmerge = ""

for selection in selections:

    count = count + 1

    selectionname = "stats27171wqi_Conlevel" + str(count)

    print selectionname

    arcpy.SelectLayerByAttribute_management('wqi_Conshp_clip27171','NEW_SELECTION',selection)

    arcpy.Statistics_analysis('wqi_Conshp_clip27171',selectionname,[["Shape_Area","sum"]])

    arcpy.AddField_management(selectionname,'rate','DOUBLE')

    arcpy.CalculateField_management(selectionname,'rate','!SUM_Shape_Area!/{}'.format(Sum_Area27171),'PYTHON_9.3') 



    arcpy.Merge_management([selecationmerge,selectionname], selecationmerge)

share|improve this question

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1

share|improve this question

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1

asked 16 mins ago

Zhenyu YaoZhenyu Yao

1