We are trying to make a decision tree using rpart and we are continually
running into the following error:

> fit_rpart=rpart(ENROLL_YN~MINORITY,method="class")
> summary(fit_rpart)
Call:
rpart(formula = ENROLL_YN ~ MINORITY, method = "class")
  n= 5725

  CP nsplit rel error
1  0      0         1
Error in yval[, 1] : incorrect number of dimensions

ENROLL_YN is a categorical variable with two options- yes or no.
MINORITY is also a categorical variable with two options- 0 or 1.

We have confirmed that all variables are the same length and there are no
NAs.

Does anyone have any ideas that might help?? All thoughts would be
appreciated, thanks!

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