On Sat, Oct 8, 2011 at 4:15 AM, Allin Cottrell <cottrell@wfu.edu> wrote:

On Sat, 8 Oct 2011, Hélio Guilherme wrote:

While running an ANOVA linear regression got this untranslated message:
anova: the x variables must be discrete

OK, I'll figure what to do about that. But note that the "anova" command is not really a case of linear regression -- it's an alternative (in general an inferior one, I would say) to regression.

I was just referring the location in "Other Linear models...".

The "x variables" are the treatment variable and (for two-way ANOVA) the "block" or control variable, and it's inherent in the ANOVA approach that these must be discrete (they're just category codes).

For reference, here's a trivial ANOVA example:

<hansl>
open data9-7
series season= WINTER? 1: SPRING? 2: SUMMER? 3: 4
anova QNC season
# compare regression, more informative
ols QNC WINTER SPRING SUMMER FALL
</hansl>

Allin

Now it's better:
anova: the treatment variable must be discrete

But it is not marked for translation :)

Best Regards,
Hélio