multcompare and anovan with continuous group variable

Hi everyone,

I am a bit confused about how to use multcompare and anovan, when one of my variables is continuous: y = [3.2184 4.2694 4.2562 4.7992 5.3111 6.0386];

g1 = {'file 1', 'file 1', 'file 1', 'file 2', 'file 2', 'file 2'};
g2 = [1.0000    1.1000    1.3400   1.3100   1.4100    1.6000];

[p1,table1,stats1] = anovan(totmean(1,(1:10))' , {g1 g2}, 'continuous', (2),'model','interaction');

I am supposed to use parameter 'dimension' :

[c,m,h,nms] = multcompare(stats1, 'dimension', 2)

The problem is that when I run it, I get:

Error using multcompare (line 245)
DIM must specify only categorical factors with 2 or more degrees of freedom.

Could anyone help me with that?

Thank you!!