Unable to assign a vpasolve result from a for loop
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Hello there,
It's been a little while since I last used matlab extensively and this little error here has been driving me nuts for hours now.
I have a very simple script that runs a for loop to calculate multiple variables with an end goal of acquiring two arrays for a plot D(i) and H_sol(i), however, the last line with H_sol(i) is giving me an error:
Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
If I remove the i index, it will run with no problems, so I am a little confused here. Why would it not allow me to have two values of D and H_sol that correspond to the same i value/index?
syms k H0_t3
g=9.81;
omega=0.54
Hb=8
D=0:0.5:110;
for i=1:length(D)
eq1=omega^2==g*k*tanh(k*D(i));
k_var=vpasolve(eq1,k,0.01);
G_var=(2*k_var*D(i))/(sinh(2*k_var*D(i)));
eq2=H0_t3==Hb*sqrt((1+G_var)*tanh(k_var*D(i)));
H_sol(i)=vpasolve(eq2,H0_t3)
end
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Accepted Answer
Torsten
on 26 Oct 2022
Edited: Torsten
on 26 Oct 2022
For D = 0, there is no solution for k. And why do you solve for H0_t3 ? If Hb does not depend on H0_t3, the equation for H0_t3 is already explicitly solved for this variable.
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