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Why is this if statement not working?

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Jay
Jay on 24 Oct 2016
Commented: Jay on 24 Oct 2016
for i=1:10
if Li_m_full10(i,1)*10^6 ~= Ri_m_full10(i,1)*10^6
% error
error_1 = sprintf( 'Difference In X Coordinate %d Between Left and Right Model Space', i );
disp(error_1)
elseif Li_m_full10(i,3)*10^6 ~= Ri_m_full10(i,3)*10^6
% error
error_2 = sprintf( 'Difference In Z Coordinate %d Between Left and Right Model Space', i );
disp(error_2)
else
end
end
Where
Li_m_full10 =
[15.9811212241544, 20.7151917170739, -41.3158787392910;
-6.21811036412999, 13.5650723523276, -40.8359583400025;
14.7702533518152, -9.41689361653716, -36.6475648350934;
16.7856234567904, 5.44965770745775, -38.5652761874981;
-4.49546718159992, -10.4977549136369, -37.1977822200610;
-5.58443840827459, 23.1514495438229, -42.0048342504297;
10.1458674678489, -3.29370264049584, -37.9925268240093;
10.8958379341580, 4.99817118096055, -38.7136591008241;
6.96457186489267, 16.0885054037253, -40.6268086865610;
-2.21974302416626, 10.6246429546594, -40.3661741974887]
and
Ri_m_full10 =
[15.9811212241544, 20.6926665759825, -41.3158787392910;
-6.21811036412999, 13.5219038409356, -40.8359583400025;
14.7702533518152, -9.43334232312408, -36.6475648350934;
16.7856234567904, 5.48342269300826, -38.5652761874981;
-4.49546718159991, -10.4862449523353, -37.1977822200610;
-5.58443840827459, 23.1872988430950, -42.0048342504298;
10.1458674678489, -3.27066013992277, -37.9925268240093;
10.8958379341580, 5.01851352020439, -38.7136591008241;
6.96457186489267, 16.0681334029748, -40.6268086865610;
-2.21974302416626, 10.5691345641832 -40.3661741974887]
Errors are printed for all values.
The '~=' in the code doesn't seem to be working for each element i.
  1 Comment
KSSV
KSSV on 24 Oct 2016
You may consider difference of the columns you want to find whether the numbers are different or not.
d1 = Li_m_full10(:,1)-Ri_m_full10(:,1) ;
d2 = Li_m_full10(:,3)-Ri_m_full10(:,3) ;
In the above id d1 or d2 has zeros, then the numbers are equal, if not they are different.

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Accepted Answer

Walter Roberson
Walter Roberson on 24 Oct 2016

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