If I understand your problem correctly I think you could adapt the approach I show in the simple example below
% make example table
animal = {'cat' 'cat' 'dog' 'fish' 'cat' 'hamster'}'
size = {'large' 'small' 'large' 'small','large','large'}'
color = {'black','brown','white','red','striped','brown'}'
weight= [2.2,1.3,5,0.5, 1.75,0.2]'
T = table(animal,size,color,weight)
% find weight of large,striped, cat
query = table
query.animal = 'cat'
query.size = 'large'
query.color = 'striped'
% find the correct row in table
[found,idx] = ismember(query,T(:,1:3),'rows')% just use columns that need to be matched
% get the corresponding weight
w = T.weight(idx)
