Interpolation of zero values ​​in matlab

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Lev Mihailov
Lev Mihailov 2019-7-18
评论： Alex Mcaulley 2019-7-22
Hello! The readings from the gas sensor look like this: 70 71 0 69 0, at a temperature of 12 12.2 12.1 11.9 11.2. I try to interpolate all zero values, but for some reason I don’t consider it at all
[cat,nocat]=min(Animals); %readings from a 1x1200 thermometer
[dog,nodog]=max(Animals); % gas sensor reading 1x1200
for i=1:length(cat)
if dog(i)<0 % if some indication is less than 0 (they are all positive)
interpol(i)=dog(i); % the location of these zeros and this is what we interpolate (1 and the last value are not zero)
c(i)=interp1(interpol(i),cat(i),nearest); % interpolate;
else(i) dog(i)>0 % if the values ​​are greater than 0
c(i)= dog(i); % That testimony and remain
end
end

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Alex Mcaulley
Alex Mcaulley 2019-7-18
编辑：Alex Mcaulley 2019-7-18
Try this: (Note that "cat" is not a good variable name because it is a Matlab function)
[cat,nocat]=min(Animals); %readings from a 1x1200 thermometer
[dog,nodog]=max(Animals); % gas sensor reading 1x1200
vq = interp1(cat(dog>0),dog(dog>0),cat(dog<=0),'nearest','extrap'); %nearest or other interpolation method you want
dog(dog<=0) = vq;
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Lev Mihailov
Lev Mihailov 2019-7-22
Thank you, everything seems to work, but now I have 202 values. And I just wanted to replace my zeros in the dog with the values ​​of this interpolation, that would be 1x1200, all values ​​are positive numbers
Alex Mcaulley
Alex Mcaulley 2019-7-22
What variable has 202 values? vq? That is right (it is the number of zeros in dog variable)
If you see the dog variable it should have the same number of elements than in the begining (1200) with non zero values.

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