Not getting expected results

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satish kumar 2020-5-12

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评论： satish kumar 2020-5-13

Het guys, i attached a code here. The problem is that the very first 'R' matrix i have to get is a Identity Matrix. Unfortunately, i don't know what went wrong there is some mistake. Could anyone shed some light, what i did wrong?. Thanking you in advance.

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回答（1 个）

James Tursa 2020-5-12

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https://ww2.mathworks.cn/matlabcentral/answers/525043-not-getting-expected-results#answer_432119

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I get the identity matrix with your code:

>> phi = 0;
>> psi = 0;
>> theta = 0;
>>         R=[cosd(phi).*cosd(psi)-sind(phi).*cosd(theta).*sind(psi)   sind(phi).*cosd(psi)+cosd(phi).*cosd(theta).*sind(psi)   sind(theta).*sind(psi)
            -cosd(phi).*sind(psi)-sind(phi).*cosd(theta).*cosd(psi) -sind(phi).*sind(psi)+cosd(phi).*cosd(theta).*cosd(psi) sind(theta).*cosd(psi)
            sind(phi).*sind(theta)  -cosd(phi).*sind(theta)  cosd(theta)]
R =
     1     0     0
     0     1     0
     0     0     1