two questions. (ascending order, ASCII)

#1

function hw(N)

A=zeros(1,N);

for i=1:N

      A(i)=input('Enter a number: ');

end

i have this code.

From now on, i have to make these numbers in ascending order.

But i can not use SORT function.

#2

I got the result screen.

I have to make a code for this result.

[65]A [66]B [67]C [68]D [69]E

[66]B [68]D [70]F [72]H [74]J

[67]C [70]F [73]I [76]L [79]O

[68]D [72]H [76]L [80]P [84]T

[69]E [74]J [79]O [84]T [89]Y

please help.

[Geoff Hayes]

Lim - presumably you have discussed (in class) the algorithm that you are supposed to implement so that the N numbers are sorted in ascending order. The bubble sort algorithm is an easy one to implement so start coding that up. If you are getting stuck at a specific step then post back (here) with what you have implemented and where you are experiencing problems.

[Lim Miso]

I tried to use Bubble sorr, but i got another problem. I had never learned SWAP command. So is there any command that i can use instead of SWAP code in the bubble sort.?

[Image Analyst]

The swap command can be done with the "deal()" function:

a=10
b=20
[b, a] = deal(a, b)

In the command window you'll see:

a =
    10
b =
    20

b =
    10
a =
    20

Take special note of the order that the variables are in.

Answer 1

[TastyPastry]

For #1, you can either sort as the user inputs numbers or sort at the end. Personally, I'd just sort it at the end for simplicity's sake. Since you can't use sort(), you'll have to write your own sorting function. Code for various sorting methods is readily available online. You could just write a bubble sort because it's one of the easiest to understand. It's slow, but I doubt you'll be working with massive vectors for this code. There are ways of using Matlab's other built-in functions to return sorted lists (unique() can, but you have to twiddle around with it a bit), but for the sake of homework, it's probably better to write your own sort.

For #2, I'd create 5 vectors of ASCII values using the : operator and concatenating them into an array. Then, use a nested for loop to individually format each number into a cell array of strings. For example, for the first value 65,

 myCell{index} = ['[' num2str(myArr(index)) ']' char(myArr(index))];

Answer 2

[Image Analyst]

For #2, here's a huge hint:

for row = 1 : 5
  for col = 1 : 5
    fprintf('[%d]%c ', col+63+row, col+63+row);
  end
  fprintf('\n');
end

Making a slight modification to it will solve your homework. I'm sure a smart engineer like you can figure out what that might be.