How to write a program to draw a diamond of stars in MATLAB?

I don't know use (for, if, while. how) to write a program to draw a diamond of stars.

I bought the book and tried to solve the example, but I could not find a solution.

I want to use these at once to create code.

The problem is this 'Create using [For, if, while]'

             *
            ***
           *****
          *******
           *****
            ***
             *

[Rik]

Have a read here. It will greatly improve your chances of getting an answer.

[Jan]

@cha hong: Please ask a specific question. It would not be useful, if we post a solution here - most of all because we do not know the actual question.

Show us, what you have tried so far and ask a specific question.

Answer 1

[Andrei Bobrov]

n = 7;
m = ceil(n/2);
ii = toeplitz([ones(m,1);zeros(n-m,1)]);
out = repmat(' ',n);
out(ii & rot90(ii)) = '*'

Answer 2

[Rahul Patel]

for i=1:2:9
    for l=9:-2:i
        fprintf(' ')
    end
    
    for j=1:i
        fprintf('*')
    end
        fprintf('\n') 
end

for i=9:-2:1
    for l=i:2:9
        fprintf(' ') 
    end
    
    for j=i:-1:1
        fprintf('*') 
    end
        fprintf('\n')
end

Answer 3

[Md. Hasibur Rahman Niloy]

for r=1:a
    %space 
    for j=a:-1:r
        fprintf(' ');
    end 
    %pattern
      for j=1:r
        fprintf(' %d',j);
    end
    
  
    fprintf('\n');
end
for r=1:a
    for j=1:r
        fprintf(' ');
    end
      for j=a:-1:r
        fprintf(' %d',r);
    end
  fprintf('\n');
end

[Rik]

Was this intended as a complete answer or as your own question?

[Vinit Ghone]

Why is there a space in the fprint(' %d,')? If I remove the space it is not printing in the diamond shape!

[Rik]

@Vinit Ghone Then you know the answer already, right? Did you read the documentation for the fprintf function?

[Vinit Ghone]

Yes, I did, didn't understood it as I am just started to learn MATLAB to develop logic. Still could you please explain?

[Rik]

fprintf will print the FormatSpec, replacing special tokens. That means '\n' will be replaced by a newline character etc. 'a\n' will therefore print the letter a and a newline. The percent symbol will make fprintf look at the further input you have provided.