How to get minimum value among more than two matrix

I have 5 matrix of following values as per below:--

A = [1 2 3;0 0 5]

B = [3 2 3;0 0 3]

C = [1 5 3;0 0 2]

D = [7 2 3;0 0 1]

E = [4 2 3;0 0 7]

I want to find minimum value in the last row (i.e. second row) and its index also, so that the final result should be as follows:--

Minimum value = 1

Index = D(2,3)

Also, please tell how to find matrix having closest to particular value, say 3 in second row among A, B, C, D, E matrix's... So, as to get the result as per below:--

Value = 3

Matrix = B(2,3)

[Adam]

If you insist on putting them all in individually named variables there isn't all that much neat that you can do. I would just concatenate them together, find the minimum and then interpret its index back from that, depending on what it was going to be used for.

Including 'D' in an index result is not a good way to be programming numeric code.

[Stephen23]

"I have 5 matrix ..."

Well, that is the problem right there. If you simply put all of your data into one array then this task would be trivially simple. Put all of your data into lots of separate arrays and you waste your life trying to figure out solutions to problems instead.

Solution: concatenate your data into one array. Then use min.

[Adam]

As an aside, there are many 0s in the last row of each of those matrices so these would be the minimum values.

Answer 1

[Jan]

Do not store the arrays in different variables, but as an array:

A = [1 2 3;0 0 5]
B = [3 2 3;0 0 3]
C = [1 5 3;0 0 2]
D = [7 2 3;0 0 1]
E = [4 2 3;0 0 7]
Data = {A,B,C,D,E};

Now run a loop:

minValue = Inf;
minIndex = 0;
minArg   = 0;
for k = 1:numel(Data)
  [aMin, aIndex] = min(Data{k}(2, :));
  if aMin < minValue
    minValue = aMin;
    minIndex = aIndex;
    minArg   = k;
  end
end

Well, a numerical array would be much easier.