Find zeros in one variable and mark it in another one

Question

Daria Ivanchenko 2020-10-7

0
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https://ww2.mathworks.cn/matlabcentral/answers/607011-find-zeros-in-one-variable-and-mark-it-in-another-one

回答： Raunak Gupta 2020-10-9

采纳的回答： Raunak Gupta

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Hi!

I have a code like this:

blinks = zeros(size(pupil_left));
% blinks(end+1,:) = zeros(size(pupil_left));
filter_pupil_left = find(pupil_left==0);
for k=1:length(filter_pupil_left)
    blinks(filter_pupil_left(k)+(-70:70))=1;
end

I want to find all zeros in the variable "pupil_left" and mark them with ones in the variable "blinks", I also want to mark with ones 70 arrays before the first zero and 70 arrays after last zero. This code works but I would like to know how to do the same thing if I want to put ones not in the first row of the variable "blinks" but in the last one. I understand that I have to add some indexing to this line:

blinks(filter_pupil_left(k)+(-70:70))=1;

How can I do it? Should it be something like this?

blinks(filter_pupil_left(k)+(-70:70), [end+1,:])=1;

Thanks for your help!