Finding Minimum Distance Between Points to Find Indexed Variable

Question

Jonathan Pinko 2020-3-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/510588-finding-minimum-distance-between-points-to-find-indexed-variable

评论： Jonathan Pinko 2020-3-24

采纳的回答： Turlough Hughes

Hi All,

Two matrices, one here with size 1251x3:

dtamatrix = [xFe54t(:),Fo(:),DeltaFe56(:)];

And another one here, with size 4x1:

Felimitmatrix = [Foyqlimit(:)]

First, I want to find which values of Fo each of my Foyqlimit values are closest to, generating four values of Fo. Then, I want my code to read the specific xFe54t values that correspond with these four values of Fo, generating a 4x1 column vector of xFe54t values.

Can anyone provide any insight as to how to do this?

Thanks,

Joanthan

2 个评论
显示无隐藏无

darova 2020-3-12

Too much explanations. Couldn't handle them

Can you make a simple drawing or something?

Jonathan Pinko 2020-3-13

A drawing would be tough, but I'll try to simplify things. I've changed things a little.

Two matrices, one here with size 1251x3:

dtamatrix = [xFe54t(:),Fo(:),DeltaFe56(:)];

And another one here, with size 4x1:

Felimitmatrix = [Foyqlimit(:)]

First, I want to find which values of Fo each of my Foyqlimit values are closest to, generating four values of Fo. Then, I want my code to read the specific xFe54t values that correspond with these four values of Fo, generating a 4x1 column vector of xFe54t values.

How could I do this?

Thanks for responding.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Turlough Hughes 2020-3-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/510588-finding-minimum-distance-between-points-to-find-indexed-variable#answer_420040

编辑：Turlough Hughes 2020-3-13

在 MATLAB Online 中打开

If you don't have the statistics and machine learning toolbox you can do the following:

[~,idx] = min(abs(dtamatrix(:,2) - Felimitmatrix.')); % for 2016b and later

and alternatively for versions prior to 2016b

[~,idx] = min(abs(bsxfun(@minus,dtamatrix(:,2),Felimitmatrix.'))); % before 2016b

Results:

xFe54t_Flim = dtamatrix(idx,1);

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Jonathan Pinko 2020-3-24

I apologize for the late reply, but this worked great.

Thank you!

请先登录，再进行评论。

Answer 2

darova 2020-3-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/510588-finding-minimum-distance-between-points-to-find-indexed-variable#answer_420039

在 MATLAB Online 中打开

Use pdist2 to find closest points

D = pdist2(Fo(:),Foyqlimit(:));         % every combination (Matrix 1251x4)
[~,ix] = min(D);                        % closest indices
xFe54t(ix)                              % values you want