Resolving the "Homeworks"... is it correct?

Answer a) Write a Function in Matlab which receives a Matrix and a Int for input argument and returns the transformed Matrix, and in this transformed Matrix all of the Int divisible elements were devised by the Int.

b) Also write a Matlab script that allows and ask the user about the elements and dimensions of a Matrix, invoke the Function (a)) and the transformed Matrix is showned in the screen.

R: a)

function N = divide(A,b)

for i=1:size(A)
  for j=1:size(A)
    if mod(A(i,j),b)==0
       A(i,j)=A(i,j)/b
    else 
       A(i,j)=0
    end
  end
end

b)

d=input('dimension of the matrix')
for i=1:d
  for j=1:d
    M(i,j)=input('values')
  end
end
q=input('value to use for split)
disp(divide(M,q))

[Andrew Newell]

I think you're missing part of the problem statement in a). Do you want elements that are not divisible by the Int to be set to zero? Also, should "devised by" be "divided by"?

[ricsf]

Yes, "divided by", thanks

[ricsf]

no, only divide the divisible elements...

[Jan]

Then omit the "else A(i,j)=0".

Answer 1

[Jan]

Did you try to run the code? Do you have any problems with running this code?

It looks fine.

[ricsf]

No, I didn't! I'm doing this on paper :-)

[Andrew Newell]

Your chances of getting it right without testing it are slim to nil. For example, it is not immediately obvious that the output variable N is never assigned a value. But in a test, you'll quickly see a problem!

Answer 2

[Andrew Newell]

Instead of saying yes or no, I suggest you create some tests to see if it does what you want. Some examples:

A = eye(2);
divide(A,0)
divide(A,1)
divide(A,2)

What should you get in each case? What do you actually get?