Inf problem

I'm working on video, and have alot of computations in my processes. in one part i divide a number on another one, but I receive wrong result.

for example:

1.000000000000000e-03/ 1.000000000000000e-03+ 0
ans 
   =Inf

how can i handle this?

I use format short, but it doesn't help me.

please help

Answer 1

[Arnaud Miege]

You probably want (note the brackets):

m12 = deltaR12 / (min(deltaRF(ii, jj, tt), deltaRF_V(ii, jj, tt)) + epsilon);

Your code, as is divides deltaR12 by min(..,..), and then adds epsilon to the result of the division, which I suspect is not what you want.

HTH,

Arnaud

[Sean de Wolski]

Arnaud, how's the Do What I Mean Tbx coming along? We're expecting it for 2012a please :)

[Arnaud Miege]

Still working on it...

[shab shekan]

Thank you Arnauld, I don't know how do i did this funny mistake,

you're right.

thank you so much.

[Walter Roberson]

Ever since Mr. D. Adams (RIP), suppliers have been demanding a share of intellectual property rights for everything that is powered by a Nice Hot Cup Of Tea.

Answer 2

[Walter Roberson]

Please copy the exact code that reproduces this on your system. It appears that the denominator on the division is becoming 0, which could perhaps happen due to the exact spacing you use.

Also, I suggest you try

format short g

[shab shekan]

epsilon=.001;

c=0;

format short;

for tt=1 : nframes-1

for ii=1: height -1

for jj=1: width -1

M12 = M(ii*3-2:ii*3, jj*3-2:jj*3, tt) + M_V(ii*3-2:ii*3, jj*3-2:jj*3, tt);

deltaR12 = det(M12) / det(M12(1:2 , 1:2)) * norm(M12(1:2 , 1:2), 'fro');

if isnan(deltaR12)

deltaR12 =0.001;

end

m12 = deltaR12 / min(deltaRF(ii, jj, tt), deltaRF_V(ii, jj, tt)) + epsilon;

c = c+ m12;

end

end

end

c=1/c*N;

-----

denominator never can be zero, because of 'epsilon' is constant in denominator. My problem is in this line "m12 = deltaR12 / min(deltaRF(ii, jj, tt), deltaRF_V(ii, jj, tt)) + epsilon;"

and I used "format short g" before, and it doesn't usefull for my problem.

by the way, thank you so much walter.