Checking greater numbers

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Write a program that will take a random 4x4 input matrix and will check whether 3 out of the total 4 numbers in column 4 are greater than the numbers in column 2. If thats true the program displays "C4 greater than C2". If that is false it displays "C4 less than C2"

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Sean de Wolski 2011-12-13

So is it three numbers greater than a number or three numbers greater than a specific number.

[1 2 3 4], [2 2 2 1], the second one has three numbers greater than a value in the first.

Vijay 2011-12-13

It is at least three numbers from the fourth column each having a value greater than all the elements of the second column.

I hope I could clarify better.

Thanks

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Answer 1

Wayne King 2011-12-13

在 MATLAB Online 中打开

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      x = randn(4,4);
      Y = x(:,4)-x(:,2);
      if (length(Y(Y>0))>2)
      disp('C4 greater than C2');
      elseif (length(Y(Y>0))<2)
      disp('C4 less than C2');
      else
      disp('What do you want to say here?');
      end

I'm assuming you mean at least 3 of the 4 numbers in column 4 are greater than in column 2. What do you want to say if it is 2 greater and 2 less?

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Vijay 2011-12-13

Yes you are right.

Let's make it a 3x4 matrix then.

I assume that only the last else statememnt will be dropped right?

Thanks

Wayne King 2011-12-14

yes, that's right.

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Checking greater numbers

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