Subscript indices must either be real positive integers or logicals.

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sbei arafet 2016-5-9

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评论： sbei arafet 2016-5-15

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

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Answer 1

Image Analyst 2016-5-9

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编辑：Image Analyst 2016-5-9

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.

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sbei arafet 2016-5-15

i changed the image Class into uint16 instead of int16

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Answer 2

Azzi Abdelmalek 2016-5-9

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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)

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sbei arafet 2016-5-9

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