For anyone else trying to figure this out in the future, this can be accomplished with a tiled plot. Example:
% split bar graph - Liam Hurlburt (she/her) 2023.08.05
% input data here
barGraphData=[210 250 2 4 3 1; 275 225 3 4 5 2];
% set colors here
color1="#0A1F3E"; % very dark blue
color2="#1F4373"; % dark blue
color3="#2B95B7"; % electric blue
color4="#D1E4EC"; % light blue
color5="#931F32"; % red #1
color6="#B1272C"; % red #3
% set relative tile height here, higher numbers make
% top chart smaller. Minimum vaule = 2 (integers only)
tileRelativeHeight=3;
figure1 = figure; % Creates figure
t=tiledlayout(tileRelativeHeight,1); % creates tiled layout
% set Y axis label here
t.YLabel.String = 'y axis label';
%% top plot
ax1 = nexttile;
b=bar(barGraphData);
b(1).FaceColor = color1; % this section coordinates
b(2).FaceColor = color2; % colors in the top and
b(3).FaceColor = color3; % bottom plots, it can be
b(4).FaceColor = color4; % commented out to use
b(5).FaceColor = color5; % default colors
b(6).FaceColor = color6;
% uncomment line below to make make top plot logartigmic
% set(gca,'YScale','log')
set(gca,'TickLength',[0 0]) % removes tick marks and
set(gca,'Xtick',[]) % x-axis labels between plots
% legend labels go here
legend('data 1', 'data 2','data 3','data 4', 'data 5', 'data 6')
% set y limits for top plot here
ylim([200 300]);
%% bottom plot
ax2 = nexttile(2,[(tileRelativeHeight-1) 1]);
b=bar(barGraphData);
b(1).FaceColor = color1; % this section coordinates
b(2).FaceColor = color2; % colors in the top and
b(3).FaceColor = color3; % bottom plots, it can be
b(4).FaceColor = color4; % commented out to use
b(5).FaceColor = color5; % default colors
b(6).FaceColor = color6;
% x axis labels go here
set(gca,'xticklabel',["Series A","Series B"]);
set(gca,'TickLength',[0 0]) % coordinates axis tick styles between plots
% set y limits for bottom plot here
ylim([0 10]);
% adjust space between plots here, suggested
% values are 'tight' and 'none'
t.TileSpacing = 'tight';
