How to center data on the max value

Question

Ole 2021-8-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1442379-how-to-center-data-on-the-max-value

评论： Ole 2021-8-28

采纳的回答： Matt J

在 MATLAB Online 中打开

How to center 2D matrix (NxM) on the pixel with max value and fill rest with zeros?

The end result should be (NxM) with centered max.

x = -2:0.5:2;
y = 1:0.2:2;
[X,Y] = meshgrid(x,y);
Z = peaks(X,Y)
[row, col] = find(ismember(Z, max(Z(:))));   
    
N = length(x);   
M= length(y);   
row = row(1);  
col = col(1);  
if row > N/2 && col > M/2
            Z(1:(N/2-row),:) = [];  
            Z = [Z; zeros((N/2-row),M)];    
                        
            Z(1:(M/2-row),:) = [];  
            Z = [Z; zeros((M/2-row),N)];    
elseif row < N/2 && col < M/2
            Z(:,end-(N/2-col):end) = [];  
            Z = [zeros(M,(N/2-col)) Z]; 
            
            Z(:,end-(M/2-col):end) = [];   
            Z = [zeros(N,(M/2-col+1)) Z]; 
elseif row > N/2 && col < M/2
            Z(1:(N/2-row),:) = [];  
            Z = [Z; zeros((N/2-row),M)];     
            
            Z(:,end-(M/2-col):end) = [];   
            Z = [zeros(N,(M/2-col+1)) Z]; 
                                
elseif row < N/2 && col > M/2
            Z(:,end-(N/2-col):end) = [];  
            Z = [zeros(M,(N/2-col)) Z]; 
            
            Z(1:(M/2-row),:) = [];  
            Z = [Z; zeros((M/2-row),N)];    
else
    Z = Z;    
end