Interpolation of zero values in matlab
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Lev Mihailov
el 18 de Jul. de 2019
Comentada: Alex Mcaulley
el 22 de Jul. de 2019
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
el 18 de Jul. de 2019
Editada: Alex Mcaulley
el 18 de Jul. de 2019
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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Alex Mcaulley
el 22 de Jul. de 2019
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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