octave - n维插值

Question

我正在尝试使用函数并探测一个简单的 2D 示例 ，与矩阵网格值相比，interpn我无法重现插值，即.FUN(xi,yi)FUN(1,11) != 4

A = [13,-1,12;5,4,3;1,6,2];
x = [0,1,2];
y = [10,11,12];

xi = linspace (min (x), max (x), 30);
yi = linspace (min (y), max (y), 60);
FUN = interpn (x, y, A, xi, yi, "spline");

disp("value(1,11) = "), FUN(1, 11)