Interpolation command by MATLAB

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Francesco
Francesco 2014-3-24
回答： Jos (10584) 2014-3-25
Can I Know what does
shading interp
command mean? I have to do a contour plot and I have this line of code to interpolate value but I don't Know if there is another option to interpolate the value? Can anyone give me a piece of advice? Thanks.
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Chandrasekhar
Chandrasekhar 2014-3-25
shading interp varies the color in each line segment and face by interpolating the colormap index or true color value across the line or face.

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回答（1 个）

Jos (10584)
Jos (10584) 2014-3-25
The statement "shading interp" only causes the plot to be interpolated. To obtain the values you can use INTERP, INTERP1, INTERP2 etc. on your data.
% Example for 1D linear interpolation
x0 = 0:2:10
y0 = 2*(x0-5).^2 - 5*x0 + 3
x1 = 1:2:x0(end)
y1 = interp1(x0,y0,x1,'linear') % approximation
plot(x0,y0,'bo-', x1,y1,'rs')
help interp1

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