问题描述:

I am getting negative values for the R2 Squared after doing the linear regression on my data. What does it Suggest? Does it suggest the output is useless?

There's a pretty good treatment of this already existing on the stats stackexchange, which I posted as reference since most of this answer will be similar, but possibly less extensive.

The short is that your `R^2`

value is comparing your regression to a horizontal line. If your `R^2`

value is less performant than a horizontal line you'll see a negative value.

Image posted below for reference: