I need a grid, but not is the meshgrid matrix format. How to convert it to list of points like [x1 y1; x2 y2; x3 y3; …]
MATLAB: How to create list of points from meshgrid output
gridlistpoints
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I assume that x and y have the same values as x1 and y1, but in a different order. You could do a search for each pair (x1,y1), but it's faster to sort the coordinates and then reshape Z. Here is an example with an actual image to give you the idea:
%%Set up the problem
load mandrillZ = X; %rename image
nrows = size(Z,1); ncols = size(Z,2);[x1,y1] = meshgrid(1:nrows,1:ncols);x = x1(:); y = y1(:); Z = Z(:);% Scramble the elements.
index = randperm(numel(Z));x = x(index); y = y(index); Z = Z(index);%%Now the problem is set up, unscramble x and y and then reshape Z.
xy = [x y];[~,index] = sortrows(xy,[1 2]);x = x(index); y = y(index); Z = Z(index);Z = reshape(Z,nrows,ncols);image(Z)Of course, if x and y were originally obtained from a process like that in the previous cell, you won't need to sort.
First get the radius of sphere....I hope center is (0,0,0). To get radius use:
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