Hold on not working when plotting graph from a cell array

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Jo 5
Jo 5 2017-8-19
编辑： Star Strider 2017-8-19
Hello all,
I have extracted several sheets of data from an excel file (Cellulose.xlsx) into a cell array (Cellulose) and I wanted to plot the data of each sheet on the same graph. However the graph only shows the last plot even though i have used the hold on function. Can someone suggest a solution? Thanks!
Cellulose='Cellulose.xlsx';
heating_rate={'10kmin','20kmin','30kmin','40kmin','50kmin',...
'60kmin','70kmin','80kmin','90kmin','100kmin'};
n=length(heating_rate);
data=cell(n,1);
for idx=1:n
data{idx}=xlsread(Cellulose, heating_rate{idx});
end
figure(1); hold on;
for i=1:n
x1=data{n,1}(:,1)+273.15;
y1=data{n,1}(:,3);
plot(x1,y1);
end
hold off;

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Star Strider
Star Strider 2017-8-19
编辑：Star Strider 2017-8-19
This works:
figure(1)
hold on
for i=1:n
x1=data{i,1}(:,1)+273.15;
y1=data{i,1}(:,3);
plot(x1,y1);
end
hold off
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Image Analyst
Image Analyst 2017-8-19
Then please vote for him and "Accept this answer" so he gets credit for it.

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