fork download
copy 
  1. ##
  2. ##  可行的
  3. x = sample(1:10, 25, replace=TRUE)
  4. y = 1+3*x
  5. xy = data.frame(x, y)
  6. colnames(xy)
  7. fit = lm(y~x, data=xy)
  8. ##
  9. ##  不可行
  10. target <- "y"
  11. fit = lm(target~x, data=xy)
Success #stdin #stdout #stderr 0.18s 176448KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
[1] "x" "y"
stderr
copy 
Error in model.frame.default(formula = target ~ x, data = xy, drop.unused.levels = TRUE) : 
  variable lengths differ (found for 'x')
Calls: lm -> eval -> eval -> <Anonymous> -> model.frame.default
Execution halted
https://ideone.com/dWpek1
language:
R (R 3.5.2)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!