How to solve for subscripted assignment mismatch error in for loop?
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I am trying to solve an equation for a variable given another variable values and a parameter. Gamma is the given variable and I will solve for K. I tried using for loop, but I cannot get the solution due to an error: Subscripted assignment dimension mismatch.
c=5;
rho=0.06;
mu=0;
psi=1;
i=1;
sigma = 0.1;
gamma = 0:0.01:0.2;
beta_1 = 1/2 - mu/sigma^2 + sqrt((mu/sigma^2 - 1/2)^2 + 2*rho/sigma^2);
solK = zeros(1,21);
for n = 0:20
K = sym('K');
eqn = (beta_1-2)*psi*K/(c*rho) - (rho + beta_1*0.01*n*K)/(rho + 0.01*n*K)^2 == i/c;
solK(1,n+1) = solve(eqn, K);
end
4 个评论
Geoff Hayes
2015-3-29
Anuudari - please copy and paste the full error message so that we know exactly at which line (in your above code) the error is being thrown. The problem is most likely with
solK(1,n+1) = solve(eqn, K);
and this could be because the result from
solve(eqn, K)
is a symbolic array and not a double/scalar. Try stepping through the code (using the debugger) to see what is happening at this line.
Anuudari Burenbat
2015-3-30
Geoff Hayes
2015-3-31
Anuudari - what does solve(eqn, K) return? Put a breakpoint at this line and then run your code. When the debugger pauses here, run
solve(eqn, K)
in the Command Window. Look at the result and its type by using class. When you have done so, does it make sense to assign the above to
solK(1,n+1)
Anuudari Burenbat
2015-4-2
回答（1 个）
Stalin Samuel
2015-3-29
i am not sure but if you do like below error removed
solK(n+1) =solve(eqn, K);
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2015-3-29
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