problem with vectors and dimensions

Question

laith ismail 2018-1-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/376309-problem-with-vectors-and-dimensions

评论： Walter Roberson 2018-1-10

在 MATLAB Online 中打开

Good evening! I tried to solve this algorithm in script file

and Cn from this Table

and p is we will neglect it . I will use this vector for (a) (just for test )

a=[1 -0.2 3.005 -39608 - 0.0985 1.2311];

and at the end I must to get this result (note; RD=R)

I used this Matlab code

    % code
a=[1 -0.2 3.005 -39608 - 0.0985 1.2311];
n=length(a);
Ck = [[-16 0 20 0 -5 0] [8 0 -8 0 1] [-4 0 3 0] [2 0 -1] [-1 0]];  %%%Cn
switch n
    case 1
               R=0;
        w=[1 7 12 16 19 0];
        p=[6 11 15 18 20 0];
       for i=1:n+1 ;
           R=R+(a(i)*Ck(w(i):p(i))); 
       end
    case 2
               R=0;
        w=[1 7 12 16 19 0];
        p=[6 11 15 18 20 0];
       for i=1:n+1 ;
           R=R+(a(i)*Ck(w(i):p(i))); 
       end
    case 3
               R=0;
        w=[1 7 12 16 19 0];
        p=[6 11 15 18 20 0];
       for i=1:n+1 ;
           R=R+(a(i)*Ck(w(i):p(i))); 
       end
    case 4
               R=0;
        w=[1 7 12 16 19 0];
        p=[6 11 15 18 20 0];
       for i=1:n+1 ;
           R=R+(a(i)*Ck(w(i):p(i))); 
       end
    case 5
        R=0;
        w=[1 7 12 16 19 0];
        p=[6 11 15 18 20 0];
       for i=1:n+1 ;
           R=R+(a(i)*Ck(w(i):p(i)));
       end
    otherwise
        disp('high order')
end

and i got error because the dimensions are different between the vectors and i used {switch .. case } because in the future i want to Enter different values of (a) and with different lengths (I want to build algorithm working with any values of (a)) .

please if anyone can help me to find the another solution (but without use any function from symbolic toolbox functions because my target is solve it without symbolic math toolbox ) Thank you