How is curve fitting in image processing?

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I use the following code: but has an error?
v_BW = im2bw (v, level); [y x] = find(v_BW); right = x<300; xr = x(right); yr = y(right); pr = polyfit( yr, xr, 3 );
yy = linspace( 1, size(v_BW,1), 50 );
figure; imshow(v_BW, 'border', 'tight' ); hold all plot( polyval( pr, yy ), yy, '*', 'LineWidth', 3 );
floorline (1, :) = floor (xr);
floorline (2, :) = floor (yr); linda cummings: cummingslinda14 at gmail com
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John D'Errico
John D'Errico on 9 Sep 2016
Edited: John D'Errico on 9 Sep 2016
When you claim something has an error in it, provide the error message! Paste in the entire text of the error. We cannot replicate your error, since we don't have those variables to run your code.
linda cummings cummingslinda14@gmail.com
Thank you so much. I solved the problem. I found the error.

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