Interpolation command by MATLAB

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.

[Chandrasekhar]

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.

Answer 1

[Jos (10584)]

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