## Fliping a value between zero and one

on 14 Feb 2013

### Image Analyst (view profile)

When p=0;

I have to use a loop to flip the value of p between 0 and 1 and each time it has to be different in a single line of code.

Thank you

Image Analyst

### Image Analyst (view profile)

on 15 Feb 2013

What does the "When p=0;" mean? You only have to flip when p=0???

When you say "flip the value of p between 0 and 1" does that mean that p is either 0 or 1 only, or does it mean p can have a value between 0 and 1, like p=.426973 and flipping means inverting like flipped_p = 1-p?

Rooy

### Rooy (view profile)

on 15 Feb 2013

This was the question given : Write a MATLAB program that will start with the variable p=0. After the initial assignment to p, have a loop flip the value of p between 0 and 1, changing it once each loop iteration USING A SINGLE LINE OF CODE. [HINT: This is a math challenge.] Display it each iteration, using the pause() function to stop the loop temporarily each iteration

Thank you everyone for all the help

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### Image Analyst (view profile)

on 15 Feb 2013

Is this what you're looking for?

```p=0;
for k = 1 : 5 % Here's the iterative loop it requested
clc;
% Here's the single line
p = ~p
pause(1);
end
fprintf('Done with demo!\n');
```

Youssef Khmou

on 15 Feb 2013

right !

Jan Simon

### Jan Simon (view profile)

on 15 Feb 2013

Alternatively, if p should keep its type DOUBLE:

```p = 1 - p;
```
Image Analyst

### Image Analyst (view profile)

on 15 Feb 2013

That also works for any value or p in between 0 and 1, like I asked about in my comment way up at the top. So perhaps this is the most general solution.

### Youssef Khmou (view profile)

on 14 Feb 2013
Edited by Youssef Khmou

### Youssef Khmou (view profile)

on 14 Feb 2013
` your_vector=mod(0:1000,2);  %  single line code`
`   for i=1:length(your_vector)`
```   %  YOUR CODE
fprintf('%d\n',your_vector(i))
pause(0.3)
end```

### Youssef Khmou (view profile)

on 14 Feb 2013
``` for i=1:N
if mod(i,2)==0
R(i)=1;
end
end```

Rooy

### Rooy (view profile)

on 14 Feb 2013

Would you count this a one line of code ? Thank you

Youssef Khmou

### Youssef Khmou (view profile)

on 14 Feb 2013

ok look at the 2nd answer

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