How to write many interaction terms in linear regression model in R?

Question

I have a linear model with 15 independent variables. I want to run the model with all pairwise interaction terms. y~a+b+c+...15 independent variables+ab+bc+...1514 terms. I want to write this in the model matrix.Is there any way to run the model instead of manually writing 1514 terms in R?

question from:https://stackoverflow.com/questions/66067050/how-to-write-many-interaction-terms-in-linear-regression-model-in-r

Answer 1

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