Hi, If you have a field to join on, you could export the dataframe to something that is readable in QGIS like csv or xlsx
Greetings Wouter Op za 23 apr. 2022 om 19:34 schreef Nicolas Cadieux via Qgis-user < qgis-user@lists.osgeo.org>: > Hi Ming, > > The best thing would be to show your code and ask others how it can be > optimized. I find that https://gis.stackexchange.com/ is the best place > to do this but this user list definitely has some very competent > programmers. Not being one of those competent programmers, I will just > state that pandas and geopandas use a process called vectorization where > the “for loop” is done for you. > > > https://medium.com/analytics-vidhya/understanding-vectorization-in-numpy-and-pandas-188b6ebc5398 > > This means that looping over elements in a dataframe can be MUCH slower > than using vectorization. So basically, you need to figure out the right > code and avoid “for loops“ when using dataframes. > > Hope this helps > > Nicolas Cadieux > https://gitlab.com/njacadieux > > Le 22 avr. 2022 à 11:50, ming han via Qgis-user <qgis-user@lists.osgeo.org> > a écrit : > > > Hi everyone > > Is there an efficient way to copy data in a pandas dataframe to the > vector attribute table? > > I am looping element by element, which is very slow. > > Thanks > Ming > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >
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