How to glm on a linear model?

Question

null <- glm(Status ~ Idade, family = "binomial", data = train_data)

Error in model.frame.default(formula = Status ~ Age, data = train_data, : variable lengths differ (found for 'Age')

When I run glm I get no errors. All the variables are in a single dataset and there are no missing values. I divided de file in:

dim(train_data)
dim(test_data)

The error only occurs when i use the train_data and the test_data . When I use the whole file, I don't have errors.

How do I solve the problem?

Answer 1

Did you use anything like

attach(data)

If so, your response Status would be based on the full dataset.