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extract matrix from matrix with the values of the axis

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Asliddin Komilov 2020-8-14

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https://ww2.mathworks.cn/matlabcentral/answers/579537-extract-matrix-from-matrix-with-the-values-of-the-axis

评论： KSSV 2020-8-14

采纳的回答： KSSV

DL1.mat

x=linspace(0,8,91);

y=linspace(1,3,56);

I have a matrix DL1 (91x46) and need to extract DL2 =DL1(DL1<=2) and the values of the x and y axis from DL1 corresponding to DL2.

Please help

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KSSV 2020-8-14

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https://ww2.mathworks.cn/matlabcentral/answers/579537-extract-matrix-from-matrix-with-the-values-of-the-axis#answer_479868

编辑：KSSV 2020-8-14

在 MATLAB Online 中打开

[m,n]  =size(DL1)
x=linspace(0,8,n);
y=linspace(1,3,m);
[X,Y] = meshgrid(x,y) ; 
%
idx = DL1<2 ; 
idx = idx' ; 
iwant = [X(idx) Y(idx)]

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Asliddin Komilov 2020-8-14

or extract x and y values for the none NaN part of the DL2?

KSSV 2020-8-14

在 MATLAB Online 中打开

X(~idx) = NaN ; 
Y(~idx) = NaN ; 

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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