How to find corresponding x values for array of y values

Question

Meagan Rhyne 2021-2-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/749714-how-to-find-corresponding-x-values-for-array-of-y-values

评论： Meagan Rhyne 2021-2-18

Hello,

I have imported data from an image processing software where I have a series of stacked x-y coordinates (from a stacked image). My raw data consists of one column of x-values and over 400 columns of y-values. In MatLab, I currently am able to produce a1x465 array with each minimum value of y from each y column. How can I find the cooresponding x-value for each min value of y?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Cris LaPierre 2021-2-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/749714-how-to-find-corresponding-x-values-for-array-of-y-values#answer_627374

编辑：Cris LaPierre 2021-2-18

在 MATLAB Online 中打开

Use the following syntax

[M,I] = min(___)

When you are taking the min of an mxn array, I is a vector containnig the row numbers of the minimum values. Use that to index into your column of X values.

x = [3;10];
[MN,I] = min(rand(2,3))
MN = 1×3
    0.2223    0.2202    0.8156
I = 1×3
     2     1     2
x(I)
ans = 3×1
    10
     3
    10

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Meagan Rhyne 2021-2-18

Thank you! That's exactly what I needed. I'm relatively new to MatLab and don't quite know what commands exist for these things. I appreciate your help!

请先登录，再进行评论。