search for: np_000020

...I am new to many concepts.I face the following errors when I am trying to execute the following. I have 4 text files with protein accession numbers. I wanted to represent them in a venn diagram and for that I using intersect and setdiff functions. My data looks like this: file1.txt (c): NP_000005 NP_000020 NP_000030 NP_000053 file2.txt(e): NP_000005 NP_000020 NP_000030 NP_000031 NP_000053 NP_000055 NP_000087 file3.txt(h): NP_000005 NP_000020 NP_000030 NP_000053 NP_000055 NP_000057 NP_000087 file4.txt (s): NP_000005 NP_000020 NP_000030 NP_000033 NP_000053 NP_000055 NP_000087 NP_000168 Now I did t...