problems when merging two data sets
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On Tue, Feb 5, 2019 at 10:04 AM sasa kosanic <sasa.kosanic at gmail.com> wrote:
Dear All, I would like to merge two data sets however I am doing something wrong... 1 data set contains 2 columns of 'species occurrence'(1 column) in Germany and 'species names' (2 column). and the second one names of 'Red list species'(1 column) and 'species status' (2 column). so I would like to merge Red list species with species names from the first table and to sign the species status I have tried with merge function but got this an error:" 'by' must specify a uniquely valid column" I also tried with the function left_join, however no success. Also columns in two data sets are different in size. 1 table has 7189 rows and 2 table just 426 rows as we do not have much Red list Species. I would appreciate your help. Kind regards, Sasha Dr Sasha Kosanic Ecology Lab (Biology Department) Room M842 University of Konstanz Universit?tsstra?e 10 D-78464 Konstanz Phone: +49 7531 883321 & +49 (0)175 9172503 http://cms.uni-konstanz.de/vkleunen/ https://tinyurl.com/y8u5wyoj https://tinyurl.com/cgec6tu [[alternative HTML version deleted]]
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