Using 2 values on for loop doesn't work correct for me

x = input('enter x number:')
y = input('enter y number:')
z = input('enter widht:')
v = input('enter lenght:')
axes('NextPlot', 'add','XLim', [(-abs(x)-abs(z)), (abs(x)+abs(z))], 'YLim', [(-abs(y)-abs(v)), (abs(y)+abs(v))]);
for  e = x:0.5:v
    plot(e, 0, 'o')
    pause(0.15)
end
for r = y:0.5:z
    plot(r, 0, 'o') 
    pause(0.15)
end 

I am trying to plot a rectangle. But when I wrote something like this to end of the code

for r = 0:0.5:12, e = 0:0.5:10;
    plot(e, r, 'o') 
    pause(0.15)
end

I got a weird output. If I try to make square, square is full with 'o'. I don't want it to be full of 'o'. I just want to get empty rectangle or square. I couldn't get a right output. How can I do that?

Answer 1

[Jan]

Cute.

What is the purpose of

for r = 0:0.5:12, e = 0:0.5:10;

? This runs a for loop and creates a vector e with the value 0:0.5:10 in each iteration. Do you expect that Matlab can imagine, that you want to do something else? Matlab's capabilities to read your mind are very limited :-)

You try to create a square full of o's. So use nested loops:

for r = 0:0.5:12
   for e = 0:0.5:10
       plot(e, r, 'o') 
       pause(0.15)
   end
end

In the last days we find a lot of questions in the forum concerning the creation of squares. Many of them use stars instead of o's.

[st0s]

No, you got me wrong. Thank you for answer but I wanted it to be empty rectangle.