我想最小化图（boxchart）的空白。我已经尝试使用内置函数exportgraphics()获得透明背景：
https://it.mathworks.com/help/matlab/creating_plots/save-figure-with-minimal-white-space.html
但它不起作用，而是给出以下错误：

Warning: Background transparency is not supported; using white instead.

不知道有没有人帮我把图上白色去掉？先谢谢了。

clc; clear; close;

% data
D1= [0.944790802    0.557698361 0.373906779 2.046704837 2.301581619 1.527444403 1.209060357 0.255009648 0.006522648 1.391635043 0.020485623 3.06E-05    2.219570211 0.031292703 1.4617617   0.709825512 0.140968679 0.39152202  0.118959281 0.604265713 0.108340057 1.254792134 0.187867762 0.391214936 0.527749647 0.284452271 0.137486525 1.50698204  0.398872235 1.09E-05    6.030073741 0.343347524 2.66E-05    0.244522229 1.828567513 0.384888011 0.150066426 0.458832813 0.039189943 1.356957639 0.162054596 0.547751882 3.835735492 0.038394762 0.661566595 0.13553248  0.270139424 1.451613168 0.044339379 0.413170264 1.795609121 0.109564539 0.201333355 1.207746569 0.812164457 0.003902586 3.508953738 0.024859534 1.193314027 ]';
D2= [0.523944609    1.423099939 1.869691969 0.920446948 1.977619794 0.781737256 0.95977679  1.100075857 0.017899515 4.533151907 0.03790224  2.80E-05    3.432894823 0.120809324 2.359138901 1.530822669 0.24903375  3.017043435 0.357091919 1.775763839 0.067044341 2.383827733 0.496209584 1.016302313 2.17366118  0.718760335 0.316183758 1.662342228 0.658886019 1.57E-05    1.798207987 2.194711665 3.12E-05    0.777365181 1.31022147  1.803898883 0.142538755 1.633823624 0.095730818 1.917168272 1.066430117 1.570445025 0.67080804  0.028328869 0.265164055 1.313050736 0.988211581 1.355540089 0.180799139 1.559261863 2.765900536 0.275343017 0.828076679 1.749404233 1.276678701 0.003919396 4.740058349 0.059366823 1.978131529 ]';
D3 = [7.503974554   2.43552972  8.907981809 10.82563814 11.09197623 18.18846472 6.084768631 5.464296776 4.067161596 14.26678079 2.792424541 0.572435047 2.733751731 3.559015982 2.505767574 5.449188972 2.786168085 12.06056623 9.470572167 3.116171421 0.458594772 0.434307287 3.447147643 5.200432201 6.18563517  19.19753749 3.656691267 4.967834173 10.29317107 2.121656326 1.394653476 2.790630109 3.152455521 2.082149563 5.232312376 1.259368399 6.269558563 3.251263155 3.898594351 10.54554845 10.20258999 6.661139665 4.464739104 1.665067753 8.608715167 8.084037724 2.402608378 7.60967001  7.554079841 6.05757598  3.768961429 3.502224334 1.027846476 1.537041705 17.67476646 1.538015623 15.93866248 6.015687282 6.338130064 ]';
data = [D1 D2 D3];

% Requires R2019b or later
t = tiledlayout(2,2, 'Padding', 'none', 'TileSpacing', 'compact'); 

%box chart 
b=boxchart(data);

b.BoxFaceColor = [0 0.4470 0.7410];
b.WhiskerLineColor  = [0.17 0.17 0.17];
b.MarkerColor = [0 0.4470 0.7410];%black
b.JitterOutliers = 'on';
b.MarkerStyle = '.';
xlabel('x')
ylabel('y ')
title('Transparent background')

% Requires R2020a or later
exportgraphics(t,'boxPlot.jpg','BackgroundColor','none')