Error using symengine, Either base or exponent must be a scalar.

Question

N/A 2020-12-6

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/681593-error-using-symengine-either-base-or-exponent-must-be-a-scalar

回答： Ameer Hamza 2020-12-6

采纳的回答： Ameer Hamza

在 MATLAB Online 中打开

I keep getting this error and don't know how to fix it. Code is below

Error is:

"Error using symengine

Either base or exponent must be a scalar."

syms x y 
r = [3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7];
for i = 1:9
    eq1 = (x+1)^2 + (y+1)^2 - r(i).^2;
    eq2 = (3*x)+2-y;
    
    [x,y] = vpasolve(eq1,[x,y], eq2,[x,y]);
    disp(x)
    disp(y)
end

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Answer 1

Ameer Hamza 2020-12-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/681593-error-using-symengine-either-base-or-exponent-must-be-a-scalar#answer_566693

在 MATLAB Online 中打开

You are overwriting x and y inside the for-loop. The syntax for vpsaolve() is also incorrect.

syms x y 
r = [3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7];
for i = 1:9
    eq1 = (x+1)^2 + (y+1)^2 - r(i).^2;
    eq2 = (3*x)+2-y;
    
    [x_sol,y_sol] = vpasolve([eq1 eq2], [x,y]);
    disp(x_sol)
    disp(y_sol)
end