How to make multiple graphs in one plot with a for loop? (2024)

close all;

clear;

clc;

% Initial values and parameters

T2 = 0.052; % Needs to be changed > T1 needs to be checked in T2prep_function

M0 = 1;

TErange = 0.005:0.01:0.1;

T2range = 0.040:0.002:0.064; % Needs to be changed

dfrange = 100; % Scalar value for frequency range

B1var = 1; % 1 means no change in flip angle

Nspins = 500;

MLEV_size = 4; % Can be 4, 8, and 16

Mzprep = zeros(size(TErange));

compound = 'yes'; % 'yes' for compound MLEV, 'no' for simple MLEV

% Range of off-resonance values

df_range = -500:100:500;

% Create figure

figure(3);

hold on;

% Initialize legend cell array

legendstrings = cell(size(df_range));

% Loop over df_range and plot each line

for n = 1:length(df_range)

fprintf('Processing df = %d\n', df_range(n));

% Calculate T2fit for the current df_range value

T2fit = calculate_multi_T2(T2range, TErange, MLEV_size, Nspins, df_range(n), M0, B1var, compound);

% Print T2fit for debugging purposes

fprintf('T2fit for df = %d: %s\n', df_range(n), mat2str(T2fit));

% Ensure T2fit has the correct length

if length(T2fit) ~= length(T2range)

error('T2fit length does not match T2range length for df = %d', df_range(n));

end

% Plot T2fit with a DisplayName that corresponds to the current df_range value

plot(T2range, T2fit, 'DisplayName', sprintf('df = %d', df_range(n)));

% Store legend entry for current df_range value

legendstrings{n} = sprintf('df = %d', df_range(n));

end

% Finish the plot

hold off;

disp('Simulation finished');

% Add labels, legend, title, and grid

xlabel('Initial T2 (s)');

ylabel('Fitted T2 (s)');

legend(legendstrings, 'Location', 'northwest');

title('Different off-resonance values');

grid on;

% Dummy function for demonstration purposes

function T2fit = calculate_multi_T2(T2range, ~, ~, ~, df, ~, ~, ~)

% This is a placeholder function. Replace with your actual function.

% For demonstration, it returns a simple linear relation.

T2fit = T2range * (1 + 0.1 * df / max(abs(df)))*(randi([1000, 2000])/1000);

end

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