Re: [R] make a file from four individual files. but keys can be missing among files.

Hi, You didn't provide a reproducible example, which makes helping a whole lot harder. You're misunderstanding how to define a new function. Not only is g specified incorrectly, you're creating a new function called out within your loop and trying to save that to disk. You need to do more like

[R] make a file from four individual files. but keys can be missing among files.

Hello, I have a list of four files. Each file is a list of gene models, and each gene model has attributes in file columns. The sample_week-over-sample_week fold change value foreach i in file is in column 5. The gene model ID is in column 1. To make it more complicated, each gene i may not be