I'm trying to compute the distance between tuples (objects) in big data set using map-reduce function to relax this problem

Here is my map function

function Neighborhood_lower_Mapper(Data,~,intermidiateValuesOut)

Data = table2array(num_data);

%%

threshold = 0.1;

numclass = zeros();

if isempty(num_data)

numclass = [];

else

for i = 1:size(num_data,1)

count = 0;

for j = 1:size(num_data,1)

sim = 0;

for k = 1:size(num_data,2)

sim = sim + ((abs(num_data(i,k) - num_data(j,k)))/...

(max(num_data(:,k))- min(num_data(:,k))))^2;

end

sim = sqrt(sim);

if sim