How can i create these two graphs in matlab , rough idea please

plots

Answer 1

[Austin M. Weber]

This is only half an answer, but you can reproduce the plot on the left using the following code:

% Define data
x = 0 : 0.01 : 0.48;
y = 0.5 : 0.1 : 5;
% Visualize the data
figure(1)
    % Define axes limits
    xlim([min(x) max(x)]), xticks(0:0.05:0.45)
    ylim([min(y) max(y)]), yticks(0.5:0.5:5)
    % Plot red vertical lines and blue horizontal lines
    xline(x,'r')
    hold on
        yline(y,'b')
    hold off
    % Add labels to the axes
    ylabel('\phi_0')
    xlabel('{\bf\Phi}_1/{\bf\Phi}_1^{{\itmax}}')