Subscript indices must either be real positive integers or logicals.

Hi,

   dist = sqrt((r1 - r2) ^ 2 + (c1 - c2) ^ 2);
   costs(i) = 1 /ceil( dist) * exp(- abs(ceil(img(abs(r1), abs(c1))) - ceil(img(abs(r2),abs(c2)))) ^ 2 / (2 * sigma ^ 2));

c2 is equal to 0 ,so it returns Subscript indices must either be real positive integers or logicals.

Thanks

Answer 1

[Image Analyst]

faq: http://matlab.wikia.com/wiki/FAQ#How_do_I_fix_the_error_.22Subscript_indices_must_either_be_real_positive_integers_or_logicals..22.3F

If c2 is zero, img(abs(r2), 0) won't work. Make sure it's not zero.

[sbei arafet]

i changed the image Class into uint16 instead of int16

Answer 2

[Azzi Abdelmalek]

Check if abs is not used as a variable in your code. You can check by writing

whos abs

You can resolve the problem by typing

clear abs
abs(c2)

[sbei arafet]

Hi, thanks, i don't think it's the problem since abs works with other variables,i've checked it but it does'nt , the problem that the 0 is not considered as positive

[Azzi Abdelmalek]

You don't think, but have you tried to check it buy typing?

which abs
clear abs
abs(0)