INVERT first three rows of results

Question

pablolama 2019-2-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/443088-invert-first-three-rows-of-results

评论： madhan ravi 2019-2-4

采纳的回答： madhan ravi

在 MATLAB Online 中打开

I obtain these results... I want to invert first three rows of first column with first three rows of second columns.

So to have first column all positive and second all negative.

What can i do?

syms beta gamma
OA=1.42;
AB=4.3;
BO=3.33;
OO=6;
alfa=linspace(19.7, -103, 14);
% preallocate solution arrays
result_beta = nan(numel(alfa),2);
result_gamma = nan(numel(alfa),2);
% solve and save the results
for k = 1:numel(alfa)
[res_beta, res_gamma]=solve([OA*cosd(alfa(k))+AB*cosd(beta)+BO*cosd(gamma)-OO==0,...
    OA*sind(alfa(k))+AB*sind(beta)+BO*sind(gamma)==0],beta,gamma);
result_beta(k,:)=double(res_beta);
result_gamma(k,:)=double(res_gamma);
disp (result_gamma)
end

results:

   56.3136  -68.0355
   60.0422  -66.3337
   63.3157  -63.8261
  -60.6513   65.9511
  -56.9882   67.8010
  -53.0279   68.7742
  -48.9467   68.8414
  -44.8871   68.0280
  -40.9515   66.3985
  -37.2048   64.0403
  -33.6824   61.0509
  -30.3996   57.5285
  -27.3598   53.5685
  -24.5623   49.2618

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madhan ravi 2019-2-4

Give an example of the desired output.

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Answer 1

madhan ravi 2019-2-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/443088-invert-first-three-rows-of-results#answer_359437

在 MATLAB Online 中打开

Alternatively:

results(1:3,[1 2])=results(1:3,[2 1])

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pablolama 2019-2-4

在 MATLAB Online 中打开

i've posted

syms beta gamma
OA=1.42;
AB=4.3;
BO=3.33;
OO=6;
alfa=linspace(19.7, -103, 14);
% preallocate solution arrays
result_beta = nan(numel(alfa),2);
result_gamma = nan(numel(alfa),2);
% solve and save the results
for k = 1:numel(alfa)
[res_beta, res_gamma]=solve([OA*cosd(alfa(k))+AB*cosd(beta)+BO*cosd(gamma)-OO==0,...
    OA*sind(alfa(k))+AB*sind(beta)+BO*sind(gamma)==0],beta,gamma);
result_beta(k,:)=double(res_beta);
result_gamma(k,:)=double(res_gamma);
result_beta(1:3,[1 2])=result_beta(1:3,[2 1])
result_gamma(1:3,[1 2])=result_gamma(1:3,[2 1])
end