Using Looping function for linear regression

Hello,

I am relatively new to Matlab and was finally able to figure out how to runa linear regression using categorical variables.

My formula for regression is stated below:

regression = fitlm(classdata,'interactions','ResponseVar','testscores',...

'PredictorVars',{'sex','interview_age','IQscores'},...

'CategoricalVar',{'sex'})

Wherein:

Data is 'classdata'

Dependent Variable is 'testscore'

Independent Variable 1 is 'sex'

Independent Variable 2 is 'interview_age'

Independent Variable 3 is 'IQscores'

I want to conduct the same regression on on all columns 9 through 12, using the same 3 Independent variables. Therefore the dependent variable will change with each regression in the loop, while the independent variables remain constant. I tried the following formula to acheive this:

_______________________________________________________________

classdata = readtable('/Users/work/Documents/Matlab/practicematlab2.xlsx')

for lc = (9:1:12)

fit = fitlm(classdata,'interactions','ResponseVar','T(lc)',...

'PredictorVars',{'sex','interview_age','IQscores'},...

'CategoricalVar',{'sex'})

end

However, this formula does not work at all. What's the correct looping formula for this function? Any help would be REALLY appreciated.

Thank you.