Error using sym/cat>checkDimensions (line 70) CAT arguments dimensions not consistent.

Question

Dursman Mchabe 2018-8-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415008-error-using-sym-cat-checkdimensions-line-70-cat-arguments-dimensions-not-consistent

评论： Star Strider 2018-8-15

采纳的回答： Star Strider

ODE15iExample.m

在 MATLAB Online 中打开

Hi everyone, On running the code on the attachment/or dropbox link

https://www.dropbox.com/s/l5f3096vinkxmuc/ODE15iExample.m?dl=0

I get the error message:

Error using sym/cat>checkDimensions (line 70)
CAT arguments dimensions not consistent.
Error in sym/cat>catMany (line 35)
[resz, ranges] = checkDimensions(sz,dim);
Error in sym/cat (line 27)
    ySym = catMany(dim, args);
Error in sym/vertcat (line 19)
    ySym = cat(1,args{:});
Error in ODE15iExample (line 8)
eqs = [diff(c(t),t) == 1 / 1.5e-6 * (1.666667e-5 * 6.51332e-2 - 1.666667e-5 * c(t)) - ((c(t) * 8.314 * 323.15 - 149 * b(t)) / (1 /
4.14e-6) + (149 / ((1 + (1.39e-9 * d(t)) / (2.89e-9 * e(t))) * 8.4e-4)))...

What can I do?

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Answer 1

Star Strider 2018-8-15

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415008-error-using-sym-cat-checkdimensions-line-70-cat-arguments-dimensions-not-consistent#answer_332886

在 MATLAB Online 中打开

I did not troubleshoot all the errors that might be in your code, only the ones in the ‘eqs’ vector. Spaces are important, and please do not use continuation ellipses when you intend a new line. Rather than manually remove the spaces, I just put every line in parentheses. Note that the continuation line in the ‘diff(v(t),t) ==’ line, there is a missing operator. I used a + creating ‘+ n(t)’, so if I guessed wrong, replace it appropriately.

Try this version of ‘eqs’:

eqs = [(diff(c(t),t) == 1 / 1.5e-6 * (1.666667e-5 * 6.51332e-2 - 1.666667e-5 * c(t)) - ((c(t) * 8.314 * 323.15 - 149 * b(t)) / (1 / 4.14e-6) + (149 / ((1 + (1.39e-9 * d(t)) / (2.89e-9 * e(t))) * 8.4e-4))) );
(diff(g(t),t) == 1/1.5e-6 * (-1.666667e-5 * g(t)) -( 9.598e-4 * ( 1 + (1.39e-9 * d(t)) /( 3.53e-9 * h(t))) * (g(t) * 8.314 * 323.15 / 5.15e3 - i(t))) );
(diff(e(t),t) == ((c(t) * 8.314 * 323.15 - 149 * b(t)) / (1 / 4.14e-6) + ( 149 / ((1 + (1.39e-9 * d(t)) / ( 2.89e-9 * e(t))) * 8.4e-4)) - (0.162 * exp(5153/323.15) * (((d(t) * k(t)) / 1.07e-7) - 1) * (10 / ((d(t) * k(t)) / 1.07e-7)))) );
(diff(h(t),t) == (9.598e-4 * ( 1 + (1.39e-9 * d(t)) / (3.53e-9 * h(t))) * (g(t) * 8.314 * 323.15 / 5.15e3 - i(t))) - (-8.825e-3 * 12.54 * 100.0869 * m(t) * n(t) * (1-(0.84*n(t)) / (1 + 0.84 * n(t)))) );
(diff(u(t),t) == (-8.825e-3 * 12.54 * 100.0869 * m(t) * n(t) * (1 - (0.84 * n(t)) /(1 + 0.84 * n(t)))) - (0.162 * exp(-5153/323.15) * (((d(t) * k(t)) / 1.07e-7) - 1 * (10 /((d(t) * k(t)) / 1.07e-7)))) );
(diff(m(t),t) == -m(t) * (-8.825e-3 * 12.54 * 100.0869 * m(t) * n(t) * ( 1 - (0.84 * n(t)) / (1 + 0.84 * n(t)))) * 100.0869 / 2703 );
(diff(v(t),t) == (-8.825e-3 * 12.54 * 100.0869  * m(t) * n(t) * (1 - (0.84 * n(t)) / (1 + 0.84 * n(t)))) * 258.30 / 2540 ...
+ n(t) +  2 * d(t) - ((e(t) * 6.24 * n(t)) / (n(t)^2 + 6.24 * n(t) + 6.24 * 5.68e-5)) -  2 * ((e(t) * 6.24 * 5.68e-5) / (n(t)^2 + 6.24 * n(t) + 6.24 * 5.68e-5)) - ((h(t) * 1.7e-3 *n(t)) / (n(t)^2 + 1.7e-3 * n(t) + 1.7e-3 * 6.55e-8)) - 2 * ((h(t) * 1.7e-3 * 6.55e-8) / (n(t)^2 + 1.7e-3 * n(t) + 1.7e-3 * 6.55e-8)) - 5.3e-8 / n(t) == 0) ;
(1.7e-3 == n(t) * r(t) / i(t) );
(6.55e-8 == n(t) * s(t) / r(t) );
(6.24 == n(t) * q(t) / b(t) );
(5.68e-5 == n(t) * k(t) / q(t) );
(5.3e-8 == n(t) * tt(t) );
(e(t) == b(t) + q(t) + k(t) );
(h(t) == i(t) + r(t) + s(t) );
(u(t) == i(t) + r(t) + s(t))];