How to inter- and extrapolate within given values

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Andreas Krämer
Andreas Krämer 2018-11-8
回答： Cris LaPierre 2018-12-17
Hi, i'm new to Matlab and i'm pretty much overwhelmed by its infinite possibilities. Until now i was at least able to plot my readings. Now i want to determine every Z for X=(0:0.001:0.5) and Y=(0:200), but i don't know how. I already used various functions like scatteredInterpolant, griddedInterpolant,...None of them worked properly for me. Maybe you guys can help me?
Grretings Andreas

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回答（1 个）

Cris LaPierre
Cris LaPierre 2018-12-17
Do you already have your X, Y and Z data? I'm assuming that is the black dots in your plot?
I think the best scenario is to use interp2.
Xnew=(0:0.001:0.5);
Ynew=(0:200);
Znew = interp2(X,Y,V,Xnew,Ynew);
See the example on the linked documentation page.

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