how to make r squared models from a dataframe r how to get r squared for all models how to get the squared model for j if y is the dependent variable what is the r squared? how to perform model comparison in r with variable y if x is a dependent variable how to calculate r squared how to use a r squared model how to find all possible combinations of the r variables in a dataframe how to get the sql for the dependent variable in r what does combn do in r how to compare models using r how to create r squared model what variable is y r squared formula for all possible comb list how to use model comparison how to find all possible model combinations r squares a dataframe how to do model comparison r in x4 what is the dataframe name for a model how to use r. squared