Hi,
Here is how you can solve this exercise (use your MS EXcel file, then no warnings will pop up!):
FZ = unzip('Final Filtered Catalogued Object Data - Copy.zip');
rawTable = readtable(FZ{1,1},'Sheet','Final Data');
x = rawTable.ApogeeAltitude; %: get the excel column, ApogeeAltitude(Km) (header name)
y1 = rawTable.RocketBody; %: get the excel column, RocketBody (header name)
y2 = rawTable.Debris; %: get the excel column, Debris (header name)
y3 = rawTable.Payload; %: get the excel column, Payload (header name)
%%
figure;
s=stairs(x,y2);
s.Color = 'red';
set(gca, 'ylim', [0 100]);
set(gcf,'color','w');
grid on
grid minor
hold on
BB = min(s.YData);
X = [s.XData(1),repelem(s.XData(2:end),2)];
Y = [repelem(s.YData(1:end-1),2),s.YData(end)];
fill([X,fliplr(X)],[Y,BB*ones(size(Y))], 'y')
