优化这段代码 % plot_Bscan.m % Script to plot EM fields from a gprMax B-scan % % Craig Warren clear all, clc [filename, pathname] = uigetfile('*.out', 'Select gprMax output file to plot B-scan', 'MultiSelect', 'on'); filename = fullfile(pathname, filename); % Open file and read fields if filename ~= 0 iterations = double(h5readatt(filename, '/', 'Iterations')); dt = h5readatt(filename, '/', 'dt'); prompt = 'Which field do you want to view? Ex, Ey, or Ez: '; field = input(prompt,'s'); fieldpath = strcat('/rxs/rx1/', field); field = h5read(filename, fieldpath)'; time = linspace(0, (iterations - 1) * dt, iterations)'; traces = 0:size(field, 2); fh1=figure('Name', filename); clims = [-max(max(abs(field))) max(max(abs(field)))]; im = imagesc(traces, time, field, clims); xlabel('Trace number'); ylabel('Time [s]'); c = colorbar; c.Label.String = 'Field strength [V/m]'; ax = gca; ax.FontSize = 16; xlim([0 traces(end)]); % Options to create a nice looking figure for display and printing set(fh1,'Color','white','Menubar','none'); X = 60; % Paper size Y = 30; % Paper size xMargin = 0; % Left/right margins from page borders yMargin = 0; % Bottom/top margins from page borders xSize = X - 2*xMargin; % Figure size on paper (width & height) ySize = Y - 2*yMargin; % Figure size on paper (width & height) % Figure size displayed on screen set(fh1, 'Units','centimeters', 'Position', [0 0 xSize ySize]) movegui(fh1, 'center') % Figure size printed on paper set(fh1,'PaperUnits', 'centimeters') set(fh1,'PaperSize', [X Y]) set(fh1,'PaperPosition', [xMargin yMargin xSize ySize]) set(fh1,'PaperOrientation', 'portrait') end

1. 使用 try-catch 结构来处理文件读取错误，以避免程序崩溃。
2. 添加注释来解释代码的各个部分。
3. 将一些常数值（例如 X、Y、xMargin 和 yMargin）定义为变量，并且放在代码顶部，以便更容易修改和调整。
4. 使用 subplot 函数来在同一图像中显示多个场的 B-scan。
5. 将代码分成多个函数，以提高代码的可读性和重用性。
6. 使用更具描述性的变量名，以方便理解代码逻辑。