Hi, This is like a cross tab or a pivot table in Excel. You need to place the polygon layer in the column field.
https://anitagraser.com/2013/02/02/group-stats-tutorial/ Nicolas Cadieux https://gitlab.com/njacadieux > Le 18 juill. 2021 à 12:47, krishna Ayyala <[email protected]> a écrit : > > > Nicolas, > Thanks for your reply.They are not multi polygons. They are two separate > polygons. That means A with area 60 is one polygon and A with area 30 is > second polygon. If I select one polygon on the map, only one polygon gets > highlighted. But, in group stats ,I have selected the first row which is A > 60. I clicked "Features" and then "Show selected on map" both the polygons on > the map are getting highlighted. As I mentioned before, only one polygon > should get highlighted. If I create a unique id, that will not serve the > purpose. I am trying to derive the polygon with maximum area from the list > of polygons that are labeled as A. > > Regards. > >> On Sun, Jul 18, 2021 at 9:58 AM Nicolas Cadieux >> <[email protected]> wrote: >> Hi, >> >> I do you have multipolygons in your input files? If not, perhaps the >> multipolygon is being created because both polygon have the same ID, A. Try >> creating a unique id field to see what is going on. A multipolygon or >> multipart object will contain multiple polygons but only one data line in >> the data table. You can split multipolygon with a «multiple to single »tool >> found in the vector menu. >> >> Nicolas Cadieux >> https://gitlab.com/njacadieux >> >>>> Le 17 juill. 2021 à 20:56, krishna Ayyala <[email protected]> a >>>> écrit : >>>> >>> >>> Hello, >>> I have a polygon shape file with an attribute table as shown below. >>> >>> <image.png> >>> >>> >>> I am using the Group stats tool to derive only those rows that have max >>> area for each polygon. After clicking calculate, I got the results below. >>> In the below window. I have selected the first row which A 60. I clicked >>> "Features" and then "Show selected on map" . Technically, it is supposed to >>> highlight only one polygon which is A with an area 60 on the map. But is >>> highlighting both the polygons i.e..A with an area 60 and also A with an >>> area 30. Is there a way to select only the polygon A with an area 60? >>> >>> <image.png> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Qgis-user mailing list >>> [email protected] >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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