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Why does cubic interpolation give values that are outside the data range?

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Charles David
Charles David 2013-2-14
I basically want to plot temperature against latitude and longitude.I have heard that cubic interpolation gives negative values and since temperature cannot be negative i wanted to know which interpolation to use?

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回答（2 个）

Jan
Jan 2013-2-14
Linear interpolation does not create values outside the range given by the measurement.
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Charles David
Charles David 2013-2-15
But what is the difference between these methods.Which algorithms do they use and is linear really suited for my problem?

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Sean de Wolski
Sean de Wolski 2013-2-14

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