error in solving system of nonlinear equations
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I am trying to solve four nonlinear equation simultaneously on matlab. But I am getitng the "Comma separated list expansion has cell syntax for an array that is not a cell".
The screenshot of error is attached.
My code is given below.
syms x y z T
x1=1;
x2=1;
x3=1;
x4=1;
y1=1;
y2=1;
y3=1;
y4=1;
z1=1;
z2=1;
z3=1;
z4=1;
c=1;
t1=1;
t21=1;
t31=1;
t41=1;
eq1 = ((x1 - x)^2 + (y1 - y)^2 + (z1 - z)^2 )^1/2 - (c * t1) + (c * T)==0;
eq2 = ((x2 - x)^2 + (y2 - y)^2 + (z2 - z)^2 )^1/2 - (c * t21) - (c*t1) + (c*T)==0;
eq3 = ((x3 - x)^2 + (y3 - y)^2 + (z3 - z)^2 )^1/2 - (c * t31) - (c*t1) + (c*T)==0;
eq4 = ((x4 - x)^2 + (y4 - y)^2 + (z4 - z)^2 )^1/2 - (c * t41) - (c*t1) + (c*T)==0;
sol = solve(eq1, eq2, eq3, eq4);
xSol = sol.x
ySol = sol.y
zSol = sol.z
TSol = sol.T
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/309879/image.png)
댓글 수: 2
Rik
2020년 6월 4일
What release are you using? When I run this code I don't get this error.
Did you notice the warning above the error? There is no explicit solution, so when you try to extract it that doesn't really make sense.
답변 (1개)
madhan ravi
2020년 6월 4일
편집: madhan ravi
2020년 6월 4일
sol = solve([eq1, eq2, eq3, eq4],[x,y,z,T]); %proper way to use solve
댓글 수: 3
Rik
2020년 6월 4일
Are you sure there should be an explicit solution? What would you expect your output to be if you wanted to solve sin(x)==2?
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