[CFD-Lover]

Hello All,

I am working on a small problem in the geo file, which involves solving a matrix 2x2 to fit a polynomial. I was wondering if there is any way to do that. I have created the following code in Matlab and I want to do the same in the geo file

clear all;clc;close all
R = 0.509515; % m
R1 = 0.559467; % m
R2 = 0.579594; % m
L = 0;
L1 = -0.08568; 
L2 = 0.13974; 
hold on
plot([L L1 L2],[R R1 R2],'k.')

y = [R1-R;R2-R];
x = [L1^2 L1;L2^2 L2];
c = x\y;

x1 = linspace(-0.08568,0.13974,20);
for ii = 1:length(x1)
    y(ii) = c(1)*x1(ii)^2+c(2)*x1(ii)+R;
end
plot(x1,y)

Many thanks,

[CFD-Lover]

Can I for instance call a Matlab script through the .geo file in order to get the coefficients c1 and c2 that will be used in the geo file?

Thanks,

[alexeym]

Hi,

Why you cannot put this simple analytic solution into geo:



But it you REALLY want to call Matlab, you can use SystemCall function to call Matlab script, and parse output.

[CFD-Lover]

Originally Posted by alexeym

Hi,

Why you cannot put this simple analytic solution into geo:



But it you REALLY want to call Matlab, you can use SystemCall function to call Matlab script, and parse output.

Hi Alexeym,

Why not, your formula works perfect. That's what I need for now.

Many thanks for the formula,