Fill in empty cell in data.frame from previous value

Run it through a loop. I assume the cell contents is NA (Not Available). Test for it with is.na(). Whenever that returns TRUE, replace the NA value with the value from the previous row.

Cheers,
B.
On Jun 24, 2017, at 1:49 PM, Christophe Elek <christophe.elek at gmail.com> wrote:

Hello Total newbie here... I hope I read the guide properly

I have the following data.frame (I read it from a CSV file I cannot change)

 names val
1 Mandy   1
2         2
3 John    2
4         2

I want to read the row number 2, but I want the first column to be ?Mandy? and not null

print (frame[2,])
2 Mandy   2

I can manipulate the data.frame once loaded
How can I fill all cell in column ?names? with the previous value ?
Or is there a function that will get me the row and fill the ?names? column ?

NOTA BENE: I do not want the answer, I want to find it myself but I need guidance
If there is a function, tell me the library and I will search
If this is an algorithm, tell me generally how you would do and let me scratch my head first ?

Thanks Chris

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Fill in empty cell in data.frame from previous value

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