MATLAB: How to find minimum number in array other than 0 and 1

minimum in array other than 0 and 1

If i have to find minimum other that 0 and 1 in an array like A=[ 0 0 0 1 0 0 10 0 30]; I want to find min(A(A>0 && A>1)) but it is showing error : Operands to the and && operators must be convertible to logical scalar values.

Best Answer

out =  min(A(~ismember(A,0:1)));

out = min(setdiff(A,0:1));

out = min(A( A ~= 0 & A ~= 1 ));

Related Solutions

MATLAB: How to count the maximum and minimum range of non-zeros elements

Use regionprops(), in the Image Processing Toolbox:

A = [0 0 1 1 1 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 ]
props = regionprops(logical(A), 'Area');
allLengths = [props.Area];
minLength = min(allLengths)
maxLength = max(allLengths)

MATLAB: I have a problem

It is asked for "signed integer". Then uint32 is not an option, because it is unsigned.

x = 'NONE';   % requires quotes

The operator is missing in:

elseif maxA<= ((2^32)-1)   maxA > ((2^16)-1) ;
                        ^^

In addition this does not restrict the minA part.

You do not have to exclude e.g. the int8 range, if it was excluded already:

if maxA<=((2^7)-1) && minA>=-(2^7);
   x = 'int8';
elseif maxA<=((2^15)-1) && maxA>((2^7)-1) && minA>=-(2^15) && minA< -(2^7);
    x='int16';

Easier:

if maxA <= 2^7 - 1 && minA >= -2^7
   x = 'int8';
elseif maxA <= 2^15 - 1 && minA >= -2^15
   x = 'int16';

I'd prefer a loop:

TypeList = {'int8', 'uint8', 'int16', 'uint16', ...
            'int32', 'uint32', 'int64', 'uint64'};
x = 'NONE';
for k = 1:numel(TypeList)
  if isequal(double(A), double(cast(A, TypeList{k})))
    x = TypeList{k};
    break;
  end
end

Or:

minA = min(A(:));
maxA = max(A(:));
x    = 'NONE';
for aType = {'int8', 'int16', 'int32', 'int64'}
  aType = TypeList{k}
  if minA >= intmin(aType) && maxA <= intmax(aType)
     x = aType;
     break;
  end
end

minA = min(A(:));
maxA = max(A(:));
x = 'NONE';
for k = [8,16,32,64]
  if minA >= -2^(k-1) && maxA <= 2^(k-1)
     x = sprintf('int%d', k);
     break;
  end
end

Best Answer

Related Solutions

MATLAB: How to count the maximum and minimum range of non-zeros elements

MATLAB: I have a problem

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