How to write to a text file without overwriting existing file content in matlab

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Moe
Moe 2015-6-29
回答： Azzi Abdelmalek 2015-6-29
Matrix a in each run will be created new values and I want to save output values in each run to the same file without overwriting existing file.

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Azzi Abdelmalek
Azzi Abdelmalek 2015-6-29
a=rand(4)
b=[1 2 3;4 5 6]
dlmwrite('file.txt',a)
dlmwrite('file.txt',b,'-append')

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