How to code an equation with a variable that implies to all cell and save in same size of input array (using nested for loop)

data =xlsread('***');%%data is 100x1632 double
[m, n] = size(data);
min1 = min(data);
max1 = max(data);
for i=1:m
  for x=1:n
    MinMaxFunction=(data(i,x)-min1)/(max1-min1)*(1-(-1))+(-1);
  end
end

[dpb]

%%data is 100x1632 double
[m, n] = size(data);
min1 = min(data);
max1 = max(data);

Given array data is 2D, then min1, max1 are row vectors of length n.

So,what is wanted as a result of the normalization operation

 MinMaxFunction=(data(i,x)-min1)/(max1-min1);

? To scale everything to the maximum overall in the entire array or each row to its max, range, ...???

Presuming it is overall, see Answer below, if something else, give us more specifics.

Answer 1

[dpb]

data =xlsread('***');
minOverall=min(data,[],'all');
rngOverall=range(data,'all');
data=(data-minOverall)/rngOverall;

Given earlier Comment caveat...