Error when making an anova

[juan9302]

Hi.
I'm doing some anova tests, and they all work out for me, except one. I get this error.

boxplot (Grams.Oils.Consumed ~ Period)
Error in x [floor (d)] + x [ceiling (d)]:
non-numeric argument to binary operator

In all the other groups I had no problem, only in this one.

Can you help me, please?

[gongcastro]

Hi! It seems that your output variable Gramos.de.Aceites.y.Grasas.Comsumidas is of type character, which aov() does not allow. Does changing that variable to numeric solve the issue?