How to draw a semi parabola plot for a certain range (0, 1) and (0 90)?

Dear MATALAB community,

I need to get a plot as attached in image.

X-axis ranges (0, 1) and Y-axis ranges (0, 90)

I need to create certain zones and add scatters point in that semi-perbolic plane.

I have scattering points but I want to present and overlap results with this plane to idetify typ of data.

Thank you for your feedback.

Answer 1

[Amjad Iqbal]

@Jasvin Thank you for your suggestions,

I obtained parabola plane for my task as given below.

y = linspace(0, 1, 100);

x = y - y.^2;

% Plot the data

plot(x*4, y*95, 'linewidth', 2)

% Add axis labels and title

xlabel('Entropy')

ylabel('\alpha')

hold on

title('H - \alpha plane')

xlim([0 1])

ylim([0 90])

set(gca,'FontSize',12);

Answer 2

[Jasvin]

Assuming that you have the code to generate the parabola (if you don't then you can refer to the below MATLAB Answer, https://www.mathworks.com/matlabcentral/answers/67272-how-do-i-plot-parabolas-and-other-functions-in-matlab) and the scattering points refer to the endpoints of each zone/region, you can first plot the parabola and then use the hold on command (https://www.mathworks.com/help/matlab/ref/hold.html) to overlay plots on top of the parabola.

You can also make use of functions like the rectangle to plot specific shapes (https://www.mathworks.com/help/matlab/ref/rectangle.html).