Hello;
I am posting to get any help on my code that I have been struggling for some time. The project is to join two files each with 80k~180k rows. I want to merge them together by the shared common column. The problem of the shared column is partially matching, not exactly the same.
File1:
File2:
I want to merge the two file to get like:
Here is my code:
Note the first column of the File2 contains only part of the first column of File1 before the first vertical bar "|". And not all of the rows of File1 has a match in File2, may be 80k out of 180k. They are big files.
It was running, but did not append the matched part of File2 to File1. Could anyone give me some clue?
I found this join/merge problem is quite common in my work, and I do not have database like MySQL. It would be great for me to catch the spirit of the coding for this.
Thanks a lot!
Yifang
Hi All,
I have working (Perl) code to combine 2 input files into a single output file using the join function that works to a point, but has the following limitations:
1. I am restrained to 2 input files only.
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I have n files (for ex:64 files) with one similar column. Is it possible to combine them all based on that column ?
file1
ax100 20 30 40
ax200 22 33 44
file2
ax100 10 20 40
ax200 12 13 44
file2
ax100 0 0 4
ax200 2 3 4 (9 Replies)
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3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
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"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
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File 1
transcript_id gene_id length effective_length expected_count TPM FPKM IsoPct
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Hello,
This post is already here but want to do this with another way
Merge multiples files with multiples duplicates keys by filling "NULL" the void columns for anothers joinning files
file1.csv:
1|abc
1|def
2|ghi
2|jkl
3|mno
3|pqr
file2.csv:
1|123|jojo
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