ANOVA & multcomp on data matrix with groups

Hi! I have a 40x173 data matrix, and the columns are broken into 4 groups (n=10). I would like to complete an individual ANOVA for each column then based on those stats complete multiple comparisons against the 173 columns.

I am having trouble assigning the 4 groups to the matrix despite importing an additional 'group' variable as recommended here: https://au.mathworks.com/help/stats/anova1.html#bulav5i-group

After running my code anova1(data, group) I am getting the error code:

"Error using anova1 (line 93)

X and GROUP must have the same length."

Which when I click on the error, reads line 93: "error(message('stats:anova1:InputSizeMismatch'));"

I have already tried to create a 40x173 matrix with the groups 1-4 assigned to the position in the data but this retrieves the same error.

Any assistance on this would be wonderful.

Thank you!

[Alexander Guillen]

Were you able to figure it out? I am having the same issue