how to put void data to dataframe?

[soojin]

Sorry in advance for my breaking English...

I am now participating in the project that studies on international trade.
I collected all the binary trade data in CSV format. (Reporter countries / Partner countries / trade value)
The problem here is that to conduct regression analysis or other measures, I need "no trade" data along with trade data so that I can figure out the reason for trade. I have collected all the countries ISO (country code) and I want to know if there is a way to make this no trade data into my dataframe.

Thanks a lot for reading my text and I would be really pleased to see your comments...

[andresrcs]

Hi!

To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…