How to match initial index?
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I am very close to getting the index in Python to match with Matlab.
Here is the output of Python...
0.06 0.058125 0.05625 0.054375 0.0525 0.050625 0.04875 0.046875 0.045 0.043125 0.04125 0.039375 0.0375 0.035625 0.03375 0.031875 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Here is some of the Matlab code...
% clears variables and windows
clc, clear all
% user defined variables
AoA = 10*pi/180;
Uinf = 8.8;
rho = 1.204;
chord = 0.12;
span = chord*2;
thickness = 0.006;
minRad = thickness/2;
majRad = chord/4;
numPanels = 128;
xp = zeros(numPanels, 1)
yp = zeros(numPanels, 1)
% panel coordinates for a finite thickness plate with elliptical leading % edge (nodes)
xStep = chord/(numPanels/2);
xp = chord/2; % 0.06
yp = 0;
k = 1;
while k < numPanels/8
xp(k) = chord/2 - xStep*k
yp(k) = -minRad/majRad*(majRad^2-(majRad-xStep*k)^2)^(1/2)
k = k + 1;
end
Matlab output...
xp'
ans =
0.0581
0.0562
0.0544
0.0525
0.0506
0.0488
0.0469
0.0450
0.0431
0.0412
0.0394
0.0375
0.0356
0.0338
In Python the first value is 0.06, the value in Matlab is 0.058125. I need to hold numPanels = 128, don't want to change this to match indexing. In my Matlab code before the first while loop I have xp = chord/2 which is the 0.06, while yp = 0. When placing these outside the while loop will Matlab account those as the initial value at index 1?
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Accepted Answer
Birdman
on 20 Oct 2017
xp(1) = chord/2; % 0.06
yp(1) = 0;
You can make initial value assignments as above and then enter the while loop as you wrote.
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