transform.ffdf: Transform a ffdf data.frame
In ffbase: Basic Statistical Functions for Package 'ff'
Description
Usage
Arguments
Value
Examples
Description
Same functionality as transform, but on a ffdf object. Please note that you should write
your expression as if it is a normal data.frame. The resulting data.frame
however will be a ffdf data.frame.
Usage
1
2
Arguments
_data
ffdf data object to be transformed.
...
named arguments that will be added to the ffdf data.frame
Value
a modified clone of `_data`.
Examples
1
2
transform(as.ffdf(airquality), Ozone = -Ozone)
transform(as.ffdf(airquality), new = -Ozone, Temp = (Temp-32)/1.8)
ffbase documentation built on Feb. 27, 2021, 5:06 p.m.
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Description Usage Arguments Value Examples
Description
Same functionality as transform, but on a ffdf object. Please note that you should write
your expression as if it is a normal data.frame. The resulting data.frame
however will be a ffdf data.frame.
Usage
1 2 |
Arguments
_data |
|
... |
named arguments that will be added to the |
Value
a modified clone of `_data`.
Examples
1 2 | transform(as.ffdf(airquality), Ozone = -Ozone)
transform(as.ffdf(airquality), new = -Ozone, Temp = (Temp-32)/1.8)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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