Preliminary information OS: Windows XP Professional Version 2002 Service Pack 3; R version: R 2.12.2 (2011-02-25)
I have several txt files with 3 columns in each files like this: file 1: ProbeID X_Signal_intensity X_P-Value
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This question already has answers here: How to import multiple .csv files at once? (15 answers) Closed 4 years ago.
最后的观察 2022-04-25 11:55 开发者_运维百科僵尸世界大战
This question already has answers here: Only read selected columns (5 answers) Closed 8 years ago. I have some very big开发者_高级运维 delimited data files and I want to process only cert