Improfile difficulties relating to a previous question

Thanks for the previous help in the following area of intensity obtaining along a line. I am not sure if i have to start a new question once i accept an answer but i am still having trouble, only now using improfile.

The previous question was at this location:

http://www.mathworks.com/matlabcentral/answers/77334-finding-intensity-along-a-moving-line-in-an-image-and-compiling-to-give-an-angle-vs-intensity-plot

I have looked at some previous questions but am still having some trouble. I have now got the values of the circle and now have them in two matrices. One matrix for the x values and one for the y values. I also have the center point seen in the code as Cen x and Cen y. I have then created a loop to draw lines from the center to each of the outer points of the circle, but now i am trying to get the improfile of these and am having trouble. I am getting the following errors:

Error using interp2/makegriddedinterp (line 224) Interpolation requires at least two sample points in each dimension. Consider using INTERP1 if X or Y have constant coordinates that can be eliminated to reduce the dimension.

Error in interp2 (line 125) F = makegriddedinterp({X, Y}, V, method);

Error in improfile (line 213) zr = interp2(xGridPoints,yGridPoints,img(:,:,1),xg,yg,method);

Error in ThomasG3 (line 63) zr = improfile(CenY,CenX,line,ValuesFinal1(n,1),ValuesFinal2(n,1));

the code that i am using for this section is as follows:

%Plot the intensities

for n=1:360

   ValuesFinal1(n,1)= values1(n,1)+(CenY);
   ValuesFinal2(n,1)= values2(n,1)+(CenX);
[line]=vsg('DrawLine',I,[CenY,CenX],[ValuesFinal1(n,1),ValuesFinal2(n,1)],[255,255,0],1);
figure, image(uint8(line));
 % CenY is the value 211, and CenX is the value 145, these are the centre points of my circle
 % VaulesFinal1 and ValuesFinal2 are a list of values for the points on the
 % outer radius of the circle.
zr = improfile(CenY,CenX,line,ValuesFinal1(n,1),ValuesFinal2(n,1));
%Also tried to use the following with no success.
zr = interp2(CenY,CenX,I,ValuesFinal1(n,1),ValuesFinal2(n,1));
end

I would appreciate your help again, Thanks Tom

Answer 1

[Image Analyst]

I don't know what line is but don't use that name for a variable - it's a built-in function name. Secondly, CenY and CenX should each be a by 2 array since the are supposed to have both endpoints of the line. And I don't see where you're passing the image (with the poorly chosen name I) into improfile.