# solve the equation for a large frequency range

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Tasin Nusrat on 26 Sep 2021
Commented: Tasin Nusrat on 26 Sep 2021
I want to solve the below equation for the frequency range of 1Khz to 100MHz.
the equation is factor=Rsh/(Rsh+j*2*pi*frequency*Lsh)
here,
Rsh=0.01*pi
and
Lsh=5*10^-9
. But when I run the code it shows matrix mismatch
freq=1e+3:1e+8;%frequency range
Rsh=0.01*pi;
d=Rsh+(2*pi*freq*i*5*10^-9);
factor=Rsh/d;

Walter Roberson on 26 Sep 2021
Rsh=0.01*pi
Rsh = 0.0314
Lsh=5*10^-9
Lsh = 5.0000e-09
freq=1e+3:1e+8;%frequency range
Rsh=0.01*pi;
d=Rsh+(2*pi*freq*i*5*10^-9);
factor = Rsh ./ d;
In MATLAB, the / operator is "matrix right divide". Rsh/d is roughly equivalent to Rsh * pinv(d) but with some restrictions about the sizes; the * indicated here is algebraic matrix multiplication, "inner product".
What you wanted was element-by-element division, which in MATLAB is the ./ operator.
Tasin Nusrat on 26 Sep 2021
Thanks a lot

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