How to exit a for loop when only return has been done with no input data?

How can I get a for loop to break when the next input entry is empty? ie you only press return instead of entering an another point

for i = 1:99999
   point(i,:)=input('Enter a point [x y]: ')
   if 
end
points=point;
end 

Answer 1

[madhan ravi]

   point(i,:)=input('Enter a point [x y]: ','s')
                                        %  ^--^----include this

if isempty(point(i,:))==1
    break
end

[Niklas]

The complete function code,

Got following error

Enter the number of points (exit with return)

Enter a point [x y]: > [2 2]

point = [2 2]

Enter a point [x y]: >

error: askpoints: =: nonconformant arguments (op1 is 1x5, op2 is 0x0)

function points=askpoints()
disp('Enter the number of points (exit with return)')
for i = 1:9999
   point(i,:)=input('Enter a point [x y]: ','s')
  if isempty(point(i,:))==1     
    break
  end  
end
points=point
end 

[madhan ravi]

instead of > just press enter to have an empty set

[Niklas]

sorry, I don't realy follow how I should do toavoid the error

[madhan ravi]

function points=askpoints()
disp('Enter the number of points (exit with return)')
point=cell(1,9999);
for i = 1:9999
   point{i}=input('Enter a point [x y]: ','s') % just press enter to stop the loop 
  if isempty(point{i})==1     
    return
  end  
end
points=[point{:}]
end 

[Niklas]

is loops

Enter the number of points (exit with return)

Enter a point [x y]: > [2 2]

point =

{

[1,1] = [2 2]

[1,2] = [](0x0)

[1,3] = [](0x0)

[1,4] = [](0x0)

[1,5] = [](0x0)

[1,6] = [](0x0)

[1,7] = [](0x0)

[madhan ravi]

when there is no input you want to exit the loop that was your question right?

[Niklas]

exact,

example:

[1 1] return

[2 2] return

return (the for loop should be exit)

[madhan ravi]

That‘s what happens when you try my latter comment

[Walter Roberson]

error: askpoints: =: nonconformant arguments (op1 is 1x5, op2 is 0x0)

That is not an error message generated by MATLAB. It appears that it might be an Octave error message. This is not an Octave support forum.

[madhan ravi]

sir Walter really your a genius , not ina million years I would have known that if you would have not commented that it belongs to octave ?