How to write code for diagonal matrix with specified input ?

For n*n diagonal matrix :

n = input (' enter the order of the matrix : ');

s = input (' enter the value of s : ');

My question is if m = 3 and s = 1 then I should get my matrix as [a11] = 1 and remaining entries 0

if m = 3 and s = 2 then [a11] = 1 , [a22] = 1 and remaining entries o.

please help me out with this :)

[Walter Roberson]

We recommend that you do not dynamically create variable names such as a93829382.

[Walter Roberson]

a(i, i) = 1

Answer 1

[KSSV]

n = 3 ;
s = 2 ;

iwant = zeros(n) ;
for i = 1:s
    iwant(i,i)=1 ;
end
iwant

[Ugashini Preetha]

Thankyou !!

[KSSV]

Note that loop can be avoided.

[Ugashini Preetha]

I have another doubt sir,

For n*n diagonal matrix :

n = input (' enter the order of the matrix : ');

s = input (' enter the value of s : ');

I want to display my 1st (1,1) entry as "n" and the remaining entries of the diagonal as "n-1"

Is it possible to use the same for loop or I have to use if else statement ?

[Walter Roberson]

You could initialize (1,1) and loop from 2

You could loop from 1 but change (1,1) after

You could loop and have an if to figure out what to do

[Ugashini Preetha]

okay sir

Answer 2

[kainat rasheed]

v = [1 2 3 4 5];

use this matrix to use specific numbers like this

after that write it as

D = diag(v)

v = [1 2 3 4 5];
D = diag(v)

run the code