Calculation errorous values problem

I need to calculate M matrix and collected 2d and 3d coordinates. When I try to calculate M matrix it gives absurd results. What can be the problem? This is how I do it.

%3d 

c1 = [13.5 0 15.3];

c2 = [11.5 0 15.3];

...... more coordinates

%2d 

c1_2 = [1221 1293];

c2_2 = [1395 1231];

.... more coordinates


threes = [c1; c2; ...]

twos = [c1_2; c2_2]

The result it gives is so high and it should be very small. So I cannot convert back from 3d to 2d. What is wrong here?

[Matt J]

Your edited code contains no calculations, so we cannot say what is wrong....

Answer 1

[Matt J]

This is how I do it?

No. You should follow section 3.1 in the attached .pdf file. Among other problems, your current method neglects the pre-normalization recommended in subsection 3.1.2.