Finding the Euclidean Distance

I have values as

data2 = 

      [20x480 double]    [20x480 double]    [20x480 double]    [20x480 double]
      { 1x8   cell  }    { 1x8   cell  }    { 1x8   cell  }    { 1x8   cell  }

data1 = 

      [20x480 double]   
      { 1x8   cell  } 

i want to match data2 and data1 by euclidean distance and if same values are present i want to display it,plz help

[Matt J]

What's in the 1x8 cells?

What do you want displayed? The data? The column numbers of data2 which agree with data1?

When are the values considered "the same"? When the Euclidean distance = 0 precisely or is there some tolerance>0? If the tolerance=0, why care about the Euclidean distance at all? Why not just use ISEQUAL, as in my Answer below?

Answer 1

[Matt J]

 find(arrayfun(@(i) isequal(data2(:,i),data1), 1:size(data2,2) )),

[Pat]

am getting

ans =

   Empty matrix: 1-by-0

[José-Luis]

It means that no data is equal.

[Pat]

i checked by have one value 

>> data2

data2 = 

      [20x480 double]    [20x480 double]
      { 1x8   cell  }    { 1x8   cell  }

>> data1=data2

data1 = 

      [20x480 double]    [20x480 double]
      { 1x8   cell  }    { 1x8   cell  }

>> find(arrayfun(@(i) isequal(data2(:,i),data1), 1:size(data2,2) )),

ans =

     Empty matrix: 1-by-0

[José-Luis]

What is inside data1 and data2? I have a hard time understanding how Matt's code is computing distances.

[Image Analyst]

Perhaps the FAQ applies here.

[Matt J]

@Pat,

data1=data2 is not a valid example of your original problem description. In your problem as you originally posted it, data1 had only one column. When I modify your example as follows, I get the expected result

    data2={rand(20,480),rand(20,480);
           num2cell(ones(1,8)), num2cell(ones(1,8))};

    data1=data2(:,2);

    find(arrayfun(@(i) isequal(data2(:,i),data1), 1:size(data2,2) ))

      ans =

           2

If this is not what you want, edit your question clarifying the form of the data and also, include a numerical example of desired input and output.

[Pat]

if data1 has different values i get empty matrix

i want to display data is present ,how can i check the answer if it is empty matrix or not and display it

so how i can display it as "data is present".

[Walter Roberson]

isempty()