How to identify the approximate value from two different vectors?

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D Bhuiyan 2015-9-9

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评论： Image Analyst 2015-9-10

Hi, I have two different vectors where

A(Ref)=[14.553 14.100               90.4512 90.901]
B=     [12.34  14.120 14.440 13.59  90.419  90.850  300.123]

I want to identify the approximate value of the A(Ref) vector from B vector. Can anybody please help me how to identify the A(Ref) values from B vector(approximate/closest)?

Output result should be

ans = [14.120 14.440 90.419 90.850]

from B

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James Tursa 2015-9-10

How did you get your result? If I was looking for the closest match in B to the first value in A (14.553) I would have guessed your result would be 14.440. But you list 14.120. Is this a typo? Same comment for the 2nd element.

dpb 2015-9-10

Perhaps the output is sorted in ascending order, James. That'd select the values for the first two but rearrange them.

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Answer 1

Image Analyst 2015-9-10

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I agree with James that your output does not match your description. But see if this does what you want:

ARef = [14.553 14.100               90.4512 90.901];
B = [12.34  14.120 14.440 13.59  90.419  90.850  300.123];
for k = 1 : length(ARef)
  [minDistance, indexOfMinDistance] = min(abs(ARef(k) - B));
  out(k) = B(indexOfMinDistance);
end
% Show in command window:
out

Result:

out = 14.44 14.12 90.419 90.85

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Image Analyst 2015-9-10

By the way, is this homework?

D Bhuiyan 2015-9-10

Thanks for your feedback. Here I did a mistake, actually I would like to see: If two vectors are like that A(Ref)=[14.5534 14.5534 90.4512 90.4512], B= [12.3444 14.1201 14.4404 13.5999 90.419 90.850] How can I get the nearest values of A(Ref) from B? output result should be= [14.4404 14.1201 90.850 90.419] Thanks... D.B

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Answer 2

dpb 2015-9-10

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在 MATLAB Online 中打开

Assuming the above comment is true...

>> interp1(B,B,A,'nearest')
ans =
 14.4400   14.1200   90.4190   90.8500

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D Bhuiyan 2015-9-10

Thanks for your feedback and I already did it. Here I did a mistake, actually I would like to see: If two vectors are like that A(Ref)=[14.5534 14.5534 90.4512 90.4512], B= [12.3444 14.1201 14.4404 13.5999 90.419 90.850] How can I get the nearest values of A(Ref) from B? output result should be= [14.4404 14.1201 90.850 90.419] Thanks... D.B

Image Analyst 2015-9-10

Again, for the second element, how is 14.5534 (second element of A) closer to 14.1201 (from B vector and also your output), than is 14.4404 (also from B vector)???

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