How to delete an repeated values in matrix?

Question

Matlab111 2015-2-9

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编辑： Stephen23 2015-2-9

I have matrix like this, so how to delete repeated values in this case?

 [a b]=[197.9040   11.6502     41.6502   41.3856    41.3856     0      197.9040
         12.2180   51.2008     61.2008  104.3122   104.3122     0       12.2180];

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Jan 2015-2-9

Please post the wanted result also. Should the columns be unique? Or should all columns vanish, which appear more than once? Or do you mean the single elements?

Matlab111 2015-2-9

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wanted result:

 p=[11.6502 41.6502
    51.2008 61.2008];

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Answer 1

Stephen23 2015-2-9

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编辑：Stephen23 2015-2-9

在 MATLAB Online 中打开

A = [197.9040, 11.6502, 41.6502, 41.3856, 41.3856, 0, 197.9040, 12.2180, 51.2008, 61.2008, 104.3122, 104.3122, 0, 12.2180];
>> A(sum(bsxfun(@(a,b)abs(a-b)<1e-6,A,A(:)))<2)
ans =   
   11.6502   41.6502   51.2008   61.2008

Because your values are floating point it is best to avoid using eq, unique and the like, which only work for exactly identical values . Instead I used a tolerance of 1e-6, and values closer than this tolerance are assumed to be the same. You can change the tolerance to suit your values.

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Matlab111 2015-2-9

编辑：Matlab111 2015-2-9

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Stephen Cobeldick- ya i'm not getting sir, try this one

question:

c=[0.7893 0.8337 0.1479 0 0 0.1479 0.9993];

1.now i should delete the repeated values in that 'c'.

2.i should delete the values that is displayed before the zeros.

3.And finally i should delete zeros also.

Expected output:

d=[0.9993];

Stephen23 2015-2-9

编辑：Stephen23 2015-2-9

You original question, which my code above solves exactly, does not mention anything about removing values before any zeros. You are changing the requirements, which makes it difficult for us to help you.

It is considered polite to Accept answers that solve your original question. I have answered your other question, about removing leading values, here:

http://www.mathworks.com/matlabcentral/answers/176676-how-to-delete-particular-values-in-this-matrix

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Answer 2

Roger Stafford 2015-2-9

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If x is your array with repetitions

   [~,ia] = unique(x,'first','legacy');
   x = x(sort(ia));

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Answer 3

Andrei Bobrov 2015-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/176641-how-to-delete-an-repeated-values-in-matrix#answer_167453

编辑：Andrei Bobrov 2015-2-9

在 MATLAB Online 中打开

x = [197.9040   11.6502     41.6502   41.3856    41.3856     0      197.9040
         12.2180   51.2008     61.2008  104.3122   104.3122     0       12.2180];
x = x(:);
[xx,~,c] = unique(x);
b = histc(c,1:max(c));
out = xx(b==1);