multiple if statements in matlab

Question

Rakesh 2012-12-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/56704-multiple-if-statements-in-matlab

   % inputs are a_s, p, t, a
   % a_s=single number
   % p,t,a are (nX1) column vectors each 
   % output is P (also a column vector of dimension (nX1))
   %---------actual equations--------
    if a_s<a<=a_s-180
            P=p+t     for p<=180-t
            P=p+t-180 for p>180-t
    if a<=a_s or a_s-180<a       
            P=p-t     for p>=t    
            P=p-t+180 for p<t
    Note: The two if's are connected.
   %---Matlab prog. for above eqn.---    
   if a_s<a<=a_s-180
     if p<=180-t    %------(1)
         P=p+t;
     elseif p>180-t %------(2)
         P=p+t-180;
     end
   elseif a<=a_s | a_s-180<a
     if p>=t        %------(3)
         P=p-t;
     elseif p<t     %------(4)
         P=p-t+180;
     end
   end
   % I couldn't figure the mistake. While running the program, (1)&(3) are
   % ignored in matlab.

3 个评论
显示 1更早的评论隐藏 1更早的评论

Rakesh 2012-12-16

在 MATLAB Online 中打开

    Thanks for the reply. Here are few values of the variables:
    a=[10 11 55 22 25 34 39 40 41 52 54 76 113 125 133];
    p=[40 51 40 22 45 19 97 79 135 222 175 138 125 77 20]';     
    t=[80 75 45 71 71 63 61 72 89 78 73 54 9 54 65]';
    a_s=283;

Jürgen 2012-12-16

编辑：Jürgen 2012-12-16

as said above the code works fine , but see my answer: I still wonder what you want to do, you gave us a column vectors a, p and t so with those inputs and the provided code you can only run the program and see that none of your conditions are fullfilled, unless if you want to run it elementwise then you need to add a for loop for indexing, but in that case you can calculate it directly with the vector, e.g. by using the result of comparing a to a_s (zero and ones) to multiply with -t and +t

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jürgen 2012-12-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/56704-multiple-if-statements-in-matlab#answer_68640

编辑：Jürgen 2012-12-16

Hey, difficult to check it without example values but if I understand it well you are comparing a column vector p to a column t, so then all element needs to be larger or smaller than the ones in the other column no? or do you want to compare element wise