how to create this matrix [1 2 3 4 5;2 2 3 4 5;3 3 3 4 5;4 4 4 4 5;5 5 5 5 5]

Waiting for your response

[John D'Errico]

Why is it starting to look as if you are asking homework questions? This is now your second question on how to create a basic matrix?

Answer 1

[Jos (10584)]

% data
n = 7 % "order"

% engine
x = repmat(1:n,n,1) 
x = max(x, x.')

Added after comment: for non-square matrices:

    n = 4 ; m = 6 ; % n-by-m matrix
    x = max(repmat(1:m,n,1), repmat(1:n,m,1).')

[Farooq Aamir]

How it can work for rectangular matrices @ jos

[Jos (10584)]

See updated answer

Answer 2

[Andrei Bobrov]

[x,y] = ndgrid(1:5)
out = max(x , y)

[Farooq Aamir]

 thanks Andrei Bobrov but how it works for rectangular matrices

[Stephen23]

+1 nice and simple

[Andrei Bobrov]

@Stephen: Thank you, Stephen!

@Farooq Aamir:

m = 5; n = 8;
[x,y] = ndgrid(1:m,1:n);
out = max(x , y);

Answer 3

[Torsten]

A = [1 2 3 4 5;2 2 3 4 5;3 3 3 4 5;4 4 4 4 5;5 5 5 5 5];

Best wishes

Torsten.

[Farooq Aamir]

Thanks for your reply but how to generalize this matrix for higher order

Answer 4

[Benjamin Drewry]

Well super brute force method, but it helps if you are just beginning to code

clear all; close all; clc
M=5; N=5; % can vary M and N to matrix of size of interest
% preallocate matrix space
concat_matrix=ones(M,N);
j=1;
for i=1:M
  if i>N
      concat_matrix(i, :)=concat_matrix(i-1,:)+1;
  else
      repval=ones(1,j).*j;
      remains=[numel(repval)+1:N];
      concat_matrix(i,1:N)=[repval remains];
      j=j+1;
  end
end