[R] Vector replace 0 elements without using a loop

[rivercode]

Hi,

With a vector like:

x = c (22, 23, 22.5, 0,0,24, 0, 23.2, 23.5, 0,0,0, 26)

How can I replace the 0's with the previous last value without looping
through the vector ?

Something tells me I am missing the obvious.

Thanks,
Chris
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