Hi,

The following assignment behaves unexpectedly:

a=matrix(2) #makes a zero matrix
b=a
b[0,1]=2

One would expect a to stay zero, and only b to change to [0 2 0 0],
but a changes as well!
Is there a way to leave a fixed when changing b?
If a and b were numbers, changing b does not change a as well, as one
would expect.

Thanks,
Alex Popa

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