how to get correlation between columns in a data frame or matrix in R

Question

I have a data frame including 8 columns from X1 to X8. I want to get correlation between X2-X8 and X1 separately, for example X2 and X1, X3 and X1 .... X8 and X1 and finally getting 7 slopes.

set.seed(666)
g <- runif(96,1,5)
f <- matrix(g, ncol=8, nrow=12)
F <- data.frame(f)

Answer 1

Maybe separate into two parts directly as follows:

set.seed(666)
g <- runif(96,1,5)
f <- matrix(g, ncol=8, nrow=12)
F <- data.frame(f)
cor(F[, 1], F[, -1])
#>             X2         X3         X4         X5         X6         X7        X8
#> [1,] -0.231461 -0.1484853 -0.4694454 -0.1203586 -0.3976857 -0.5073719 0.2560319

^{Created on 2023-08-01 with reprex v2.0.2}