Average and maximum values of MATLAB matrix

Understand by example ：

Problem description ： Find the matrix 【2,5,4,3;2,7,8,4;3,5,3,6】 The largest number in , And replace with the average of all the numbers of the matrix , Output the last matrix ;

clc;clear;
A=[2,5,4,3;2,7,8,4;3,5,3,6];
[x ,y]=find(A==max(max(A)));
A(x,y)=mean(A(:));
disp(A);

Maximum ： The biggest element to find is max(max(A)), Note that the two-dimensional matrix needs to write two max, Find the corresponding position find function .

The average ： Find the average of the matrix mean(A(:)) ; Find that the mean value of each column of the matrix is mean（A,1）; And finding the average of each column is mean(A,2).