upsamling with any number of data
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I want to increase my data number that is different matlab functions interp and upsampling. they add numbers after every sample but i want to add them for example two and adding sample like data=(1 3 5 7 9); data_up=(1 3 4 5 7 8 9); i wrote a code but it doesn't work for every numbers sometimes it works with odds sometimes evens can anyone give any suggestion for that?
4 Comments
Image Analyst
on 10 Dec 2012
Proper indenting and adding comments to the above code would help. I'm not going to take the time to figure out badly aligned code that's uncommented with a cryptic alphabet soup of non-descriptive variable names. Perhaps someone else likes to do that though.
Accepted Answer
Wayne King
on 10 Dec 2012
something very similar to what Image Analyst suggests is just to use a linear interpolation filter.
x = 1:2:9;
xup = upsample(x,2);
h = [1/2 1 1/2];
y = filter(h,1,xup);
In this case you do get a 1/2 in the first element of the output.
More Answers (1)
Image Analyst
on 10 Dec 2012
Is this crazy, weird thing what you want?
data = [1, 3, 5, 7, 9]
% Want data_up = [1 3 4 5 7 8 9]
xInterpLocations = [1, 2, 2.5, 3, 4, 4.5, 5]
data_up = interp1(data, xInterpLocations)
In the command window:
data =
1 3 5 7 9
xInterpLocations =
Columns 1 through 4
1 2 2.5 3
Columns 5 through 7
4 4.5 5
data_up =
1 3 4 5 7 8 9
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