MATLAB: Index out of bounds

nested if

hi guys, new to matlab and came across a simple problem that takes me forever to get over. please help.
if rgb(1)==1
  if rgb(2)==1
      if rgb(3)==1
          color='white'; 
      else 
          color='yellow';  
      end
  else
      if rgb(3)==1
      color='magenta';
      else
      color='red';
      end
  end
 else
    if rgb(1)==1
        if rgb(3)==1
            color='cyan';
        else
            color='green';
        end
    else
        if rgb(3)==1
        color='blue';
        else
        color='invalid input';
        end
    end
end
so its pretty much just mix three primary colors as input and output the mixed color.. i have a hard time going through this and i don't know where i did wrong.. thanks for answering. oh and here's the error:
Attempted to access rgb(3); index out of bounds because numel(rgb)=1.
Error in rgb_color (line 26) if rgb(3)==1

Best Answer

What is your rgb value?
The error message is very clear. it stated that you tried to access the third index of rgb, whilst rgb only contains one value ( numel(rgb)=1).
Btw, you can also use logical operator instead of nested if-else statement
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