ellipse plotting from csv data

I HAVE PLOTTED AN ELLISE FROM A SET OF DATA FROM A CSV TABLE.

MY CHALLENGE IS I WANT TO CALCULATE ANGLE OF ROTATION, MAJOR AND MINOR AXIS AND ECCENTRICITY. hOW DO I DI THAT. i HAVE ATTACHED MY CODE

clear all;
clc;

fid = fopen ('No_Fault.csv');
readData = textscan(fid, '%f %f %f', 'HeaderLines', 1, 'Delimiter',',');
xData = readData{1, 1}(:,1);
x1Data = readData{1, 2}(:,1);
x2Data = readData{1, 3}(:,1);
f1 = figure(1);
cla; hold on; grid on;
% plot (xData, x1Data,'k-');
% plot (xData, x2Data,'r-');
plot (x1Data, x2Data,'r-');

[Image Analyst]

Don't you want to supply us with 'No_Fault.csv' so we can run your code???

[Tafadzwa Masocha]

im failing to attach. let me keep trying

[Rafael Hernandez-Walls]

Try this function,

https://la.mathworks.com/matlabcentral/fileexchange/3215-fit_ellipse

[Tafadzwa Masocha]

thanks

Answer 1

[Image Analyst]

Try this:

fid = fopen ('No_Fault.csv');
readData = textscan(fid, '%f %f %f', 'HeaderLines', 1, 'Delimiter',',');
xData = readData{1, 1}(:,1);
x1Data = readData{1, 2}(:,1);
x2Data = readData{1, 3}(:,1);
f1 = figure(1);
cla; hold on; grid on;
% plot (xData, x1Data,'k-');
% plot (xData, x2Data,'r-');
plot (x1Data, x2Data,'r-');
binaryImage = poly2mask(x1Data, x2Data, 10000, 10000);
props = regionprops(binaryImage, 'Orientation', 'MajorAxisLength', 'MinorAxisLength');
Orientation = props.Orientation % Degrees
MajorAxisLength = props.MajorAxisLength
MinorAxisLength = props.MinorAxisLength

You get:

Orientation =

-59.9061922702959

MajorAxisLength =

54.5758448527965

MinorAxisLength =

7.14123514397741

[Tafadzwa Masocha]

Thanks