Help in plotting a graph

How do I plot a graph like this? I am not that interested in the values and all. I just want my graph to look like this

Answer 1

[Voss]

% some data:
f = linspace(0.03,0.09,100); % row vector (1xn)
x = [-1/0.06*(f-0.06)-12; 25*exp(-40*(f-0.03))-10; 1-(f-0.09)/0.09]; % 3xn matrix of curves' data

figure
plot(f,x(1,:),'b','LineWidth',2)
hold on
plot(f,x(2,:),'r--','LineWidth',2)
plot(f,x(3,:),'k:','LineWidth',2)
box off

xlabel('Frequency(Hz)')
ylabel('Damping Ratio')

legend({'Power Mode','Opening Mode','Isolated Mode'},'Box','off')

[Indrani]

Thank you!

[Voss]

You're welcome!

Answer 2

[Image Analyst]

Try this:

numPoints = 1000;
x = linspace(0.03, 0.09, numPoints);
y = linspace(15, -10, numPoints);
plot(x, -12*ones(numPoints, 1), 'LineWidth', 3, 'Color', 'b')
hold on;
plot(x, y, 'r--', 'LineWidth', 3)
plot(x, 2 * ones(numPoints, 1), 'LineWidth', 3, 'Color', 'k')
ylabel('Damping Ratio');
xlabel('Frequency (Hz)');
legend('Power Mode', 'Opening Mode', 'Isolated Mode');

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[Indrani]

I will sign up for the course, thanks!