How to write such a matrix

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johnny
johnny 2011-4-13
Hi,
i need help. I want to create matrix which look like this:
1 B B B B
A C D D D
A C D D D
A D D D D
A D D D D
A D D D D
A D D D D
Elements: A = 0:1:6, B = 0:1:4, C = A*B, D = 12.
Thank you very much.
  2 个评论
Andrei Bobrov
Andrei Bobrov 2011-4-13
can so? (sorry for my english)
1 B1 B2 B3 B4
A1 C D D D
A2 C D D D
A3 D D D D
A4 D D D D
A5 D D D D
A6 D D D D
Elements: A = 1:6, B = 1:4, C(i,j) = A(i)*B(j), D = 12.
Jan
Jan 2011-4-13
Please specify the dimensions of C." A=0:6, B = 0:4, C = A*B" creates an error.

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回答（2 个）

Paulo Silva
Paulo Silva 2011-4-13
m=ones(7,5);
A=2;B=3;C=A*B;D=12;
m(1,2:end)=B;
m(2:end,1)=A;
m(2:end,2:end)=D;
m(2:3,2)=C;
m
Sean de Wolski
Sean de Wolski 2011-4-13
What's wrong with the method that you have above; i.e. defining it explicitly? It'll be the fastest and easiest to read.

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