interp1 插值 The values of X should be distinct

Question

xi=imread('20_0030.tif');%来自未知图片
xi=double(xi);
xi=CalBase1./xi; %这里所得的xi为1024*1280矩阵

for i=1:1024
for j=1:1280
x=[i01(i,j),i02(i,j),i03(i,j),i04(i,j),i05(i,j),i06(i,j),i07(i,j),i08(i,j),i09(i,j)]; %这里i01~019为1024*1280矩阵，是已知的
y=[1,4,14,24,42.5,59.8,68.3,80,91.8];
yi=interp1(x,y,xi(i,j),'linear'); %希望求得1024*1280的yi
end
end

但是出错了，不太明白

??? Error using ==> interp1 at 262
The values of X should be distinct.

Answer 1

interp1要求你的x必须是唯一,即x里面的元素只能出现一次.

如
x=[1,2,3];
y=[4,5,6];
y1=interp1(x,y,2.5) %这个没有问题

x=[1,2,2]; %2重复
y=[4,5,6];
y2=interp1(x,y,2.5) %这个有问题,因为2重复

你检查你的i01~i09里面有没有相同的元素出现.

Answer 2

??? Error using ==> interp1 at 262
The values of X should be distinct.

Answer 3

da