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How to repeat subjects label by simplify way?

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zb li
zb li 2018-12-21
评论： madhan ravi 2018-12-25
Hi everyone
I have row_header like this:
row_header={'Subjects','NB1','NB1','NB1','NB1','NB1','NB1','NB1','NB1','NB1','NB1','NB2','NB2','NB2','NB2','NB2','NB2','NB2','NB2','NB2','NB2',...
'NB3','NB3','NB3','NB3','NB3','NB3','NB3','NB3','NB3','NB3','NB4','NB4','NB4','NB4','NB4','NB4','NB4','NB4','NB4','NB4',...
'NB5','NB5','NB5','NB5','NB5','NB5','NB5','NB5','NB5','NB5','NB6','NB6','NB6','NB6','NB6','NB6','NB6','NB6','NB6','NB6',...
'NB7','NB7','NB7','NB7','NB7','NB7','NB7','NB7','NB7','NB7','NB8','NB8','NB8','NB8','NB8','NB8','NB8','NB8','NB8','NB8',...
'NB9','NB9','NB9','NB9','NB9','NB9','NB9','NB9','NB9','NB9','NB10','NB10','NB10','NB10','NB10','NB10','NB10','NB10','NB10','NB10',...
'NB11','NB11','NB11','NB11','NB11','NB11','NB11','NB11','NB11','NB11','NB12','NB12','NB12','NB12','NB12','NB12','NB12','NB12','NB12','NB12',...
'NB13','NB13','NB13','NB13','NB13','NB13','NB13','NB13','NB13','NB13','NB14','NB14','NB14','NB14','NB14','NB14','NB14','NB14','NB14','NB14',...
'NB15','NB15','NB15','NB15','NB15','NB15','NB15','NB15','NB15','NB15','NB16','NB16','NB16','NB16','NB16','NB16','NB16','NB16','NB16','NB16',...
'NB17','NB17','NB17','NB17','NB17','NB17','NB17','NB17','NB17','NB17','NB18','NB18','NB18','NB18','NB18','NB18','NB18','NB18','NB18','NB18'};
How to achieve it in a simpler way？
Thankyou
guke su

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madhan ravi
madhan ravi 2018-12-21
编辑：madhan ravi 2018-12-23
compose("NB%d",1:10) % edited after Guillaume’s comment
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zb li
zb li 2018-12-25
Thank you very much. My matlab ver.2016a ,I don't have string function ,so I write down the following code
infostr= ['Subject' repelem(sprintfc('NB%d',1:18),1,10)]; % edited after madhan ravi’s comment

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