how to manage matrix construction?

hi guys

i need a code to construct this matrix, the code should allow the user to insert h1,h2...h(n-1)

Answer 1

[Guillaume]

How about:

m = circshift(eye(numel(h) + 1), 1, 2)
m(end, 2:end) = h;

[janny]

this one gave an error

??? Error using ==> circshift Too many input arguments.

[Guillaume]

You must be using an older version of matlab then.

m = circshift(eye(numel(h) + 1), [0 1])

should work regardless of version

Answer 2

[Star Strider]

Janny, meet compan. It generates the companion-form matrix you want.

[janny]

sorry for being late.... i try it but it didn't work...

[Star Strider]

This isn’t actually a companion form matrix, but it has the form you want:

h = randi(10,1,4);                 % Create ‘h’ Vector
D = diag(ones(1,length(h)),1);
D(end,:) = [1 h];

[janny]

the last line came in decimal.... it should be in binary,, it came as:

0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 1 8 10 7 1

how to make it in binary

[Star Strider]

I have no idea what you’re doing. To make it binary with the randi function, change that line to:

len = 4;                    % Length of number string
h = randi([0 1],1,len);

To produce a binary string from a decimal number, use the dec2bin function.