Interpolation command by MATLAB

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Francesco
Francesco on 24 Mar 2014
Answered: Jos (10584) on 25 Mar 2014
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.
  1 Comment
Chandrasekhar
Chandrasekhar on 25 Mar 2014
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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Answers (1)

Jos (10584)
Jos (10584) on 25 Mar 2014
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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