Square Matris (diagonal)

With the Nested For loop, the diagonals line number according to the value entered by the user.

I want to write a code that creates a square matrix as many as the number that the user enters, and the other elements that show are zero.Like this if users input 4, i want to see this

1 0 0 0

0 2 0 0

0 0 3 0

0 0 0 4

Answer 1

[KSSV]

n = 4 ; 
iwant = diag(1:n)

iwant = 4×4

1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4

with loop:

n = 4 ;
iwant = zeros(n) ;
for i = 1:n
    iwant(i,i) = i ; 
end
iwant

iwant = 4×4

1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4

[ukulele]

This is not woking did you try it?

[Walter Roberson]

KSSV did try it. The output you see above for iwant is the output of a MATLAB run.

[ukulele]

n=input('Bir sayi giriniz=');
k=diag(1:n);
for i=1:n
    k(n,n)=n;
end

It happened when I type it like this but k command did not appear in the window

[ukulele]

n=input('Bir sayi giriniz=');
k=diag(1:n);
for i=1:n
    k(n,n)=n;
end

please can you try it again? i can't see k on command window

[Walter Roberson]

Why would you see k in the command window? You have semi-colons after each of your assignment statements, and that means that you do not want any output from the statement. The only output you ask for in the code is the prompt for the input() statement.

[KSSV]

You have not taken the output of k. Try printing/ viewing k.

[ukulele]

because i have to see k on command window :(

[Walter Roberson]

n=input('Bir sayi giriniz=');
k=diag(1:n)   %notice semi-colon removed
for i=1:n
    k(n,n)=n  %notice semi-colon removed
end

A statement that ends with a semi-colon does not display its value.

A statement that does not end with a semi-colon always displays its value if it was an assignment statement; if it was not an assignement statement, then in some cases it will show the value and in other cases it will not show the value, depending exactly what you were asking for.

[ukulele]

i get it thank youuu