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# Calculation errorous values problem

조회 수: 1(최근 30일)
Ömer Faruk Kurular 2019년 9월 28일
마감: MATLAB Answer Bot 2021년 8월 20일
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?
##### 댓글 수: 1표시숨기기 없음
Matt J 2019년 9월 28일
Your edited code contains no calculations, so we cannot say what is wrong....

### 답변(1개)

Matt J 2019년 9월 28일
편집: Matt J 2019년 9월 28일
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.

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