Unrecognized function or variable 'extractDe​scrAppeara​nce'. error

Hi, my code works well but it doesnt show figure 3 and 4 and i get this error

Unrecognized function or variable 'extractDescrAppearance'. error

at line 28 - colour_h1 = extractDescrAppearance(img1,key_point1);

here where i think the error starts

colour_h1 = extractDescrAppearance(img1,key_point1);

gradient_h1 = extractDescrGradient(img1,key_point1);

colour_h2 = extractDescrAppearance(img2,key_point2);

gradient_h2 = extractDescrGradient(img2,key_point2);

colour_h2(1:30,:)=randn(size(colour_h2(1:30,:)));

D = pdist2(colour_h1,colour_h2); figure(5); clf; imagesc(D);

matchlist = matchDescrs(colour_h1,colour_h2);

figure(3);imshow(img_raw1); hold on;

figure(4);imshow(img_raw2); hold on;

clist='rgbcmykrgbcmykrgbcmyk';

k=1;i=1;

while(i<numel(matchlist)&&k<21)

if(matchlist(i)<1), i=i+1; continue; end

figure(3); plot(key_point1(i,1),key_point1(matchlist(i),2),[clist(k),'*']);

figure(4); plot(key_point2(i,1),key_point2(matchlist(i),2),[clist(k),'*']);

k=k+1;i=i+1;

end

Answer 1

[Jan]

Neither extractDescrAppearance nor extractDescrGradient is a known Matlab command. Searching in the net does not find a match. So it is your turn to find out, which functions are meant. Did you write them by your own? Are they stored in a folder belonging to the Matlan path?

Note:

k=1;i=1;
while ...
   k=k+1; i=i+1;
end

k and i have the same value. What is the reason to use two variables with the same value?