How to find the contigous coordinate points between two varaibles datasets and do regression

1 次查看（过去 30 天）
Karthik M
Karthik M 2021-11-23
评论： Karthik M 2021-11-23
Folks
I have two data variable sets of different sizes, A (chlorophyll) is 4317x3 matrix of lat, lon, and con. data value and B(SST) is 5851x3 matrix, of same lat, lon, and conc. data value. I want to find the coordinates in A data set that are closest to those B.
Then based on the index locations of those coordinates in the B matrix, extract out the concentration values from that correspond to those coordinates so that I can plot A and B concentration data sets value against one another.
The difficult part is to sort the coordinate locations in the A matrix with those in the B matrix, I would like to find the closest possible coordinate locations between the 2 large marice data sets.
please find the attached link for 2 datsets files
https://drive.google.com/drive/folders/1YuwIcSA4J2KYjCBVEa5zIbF7qqqAKClV?usp=sharing
I have used this code
F = scatteredInterpolant(B(:,1), B(:,2), (1:size(B,1)).', 'nearest');
A_is_nearest_idx = F( A(:,1:2) )
B_closest_to_A = B(A_is_nearest_idx, :)
I find error
kindly help to sort the variables which was of continuous in order for synchronize and interpolate.

请先登录，再回答此问题。

采纳的回答

KSSV
KSSV 2021-11-23
idx = knnsearch(A(:,1:2),B(:,1:2)) ;
B = B(idx,:) ;
  8 个评论
显示 6更早的评论
KSSV
KSSV 2021-11-23
The attched data is time series or data at one time step? What data you have exactly? What regression you want? Spatial or temporal?
Karthik M
Karthik M 2021-11-23
The attached chlor and SST is of extracted regional MODIS Aqua netcdf time series data
I need spatial regression for chlor concentration data in relationship to that of SST conc.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Linear and Nonlinear Regression 的更多信息

标签

产品


版本

R2018b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by