How to determine the two closest values to a threshold value

Question

Jonathan Moorman 2020-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/578296-how-to-determine-the-two-closest-values-to-a-threshold-value

评论： hosein Javan 2020-8-11

Hi! I have a threshold value of 0.9 and I need to find its two closest values in a matrix.

Below is a simple example of what my question is based on. Is there a way to determine the previous y value before 0.9 (0.88 in the example) and the next value after (0.92)?

y = [0, 0.2 , 0.6, 0.88, 0.92, 1]

(Note* this is only an example matrix. The matrix values will be different every run)

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Answer 1

hosein Javan 2020-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/578296-how-to-determine-the-two-closest-values-to-a-threshold-value#answer_478293

编辑：hosein Javan 2020-8-11

在 MATLAB Online 中打开

%% nearest value considerin it is bigger or smaller than threshold
m1 = min(y(y>0.9)) % nearest value after threshold
m2 = max(y(y<0.9)) % nearest value before threshold
%% nearest value regardless of being bigger or smaller than threshold
[~,i] = sort(abs(y-0.9));
m1 = y(i(1)) % 1st nearest value
m2 = y(i(2)) % 2nd nearest value