# To exclude the extra column X from the above file write.csv(per.sal,"output.csv", row.names = FALSE) new.data <- read.csv("output.csv") print(new.data) empid empname empdept empsalary empstart_date 1 2 Rob HR 30000 03-05-2002 2 4 John R&D 35000 01-03-1999 3 5 Gary...
In SPSS, you can easily delete variables from your dataset. To drop a variable, start by selecting the “Data” menu in the main menu bar. Under this menu, go to select “Select Cases”. This will open a dialog box where you can specify which cases, or variables, to include or excl...
We compared RCT enrollees with chronic spinal pain, 1,444 participants in eight clinical trials, included in an individual participant data meta-analysis project assessing the cost-effectiveness of spinal manipulation for back or neck pain [6], to a representative sample of the US population with...
Maarten Buis <maartenlbuis@gmail.com> wrote: > >> On Wed, Jul 25, 2012 at 8:54 AM, Dheepan Ratha Krishnan wrote: >>> I am looking for a stata >>> command that will enable me to exclude individuals who have >>> experienced a particular life event more than once in my dataset....
Missing data may seriously compromise inferences from randomised clinical trials, especially if missing data are not handled appropriately. The potential bias due to missing data depends on the mechanism causing the data to be missing, and the analytical
On Wed, Jul 25, 2012 at 8:54 AM, Dheepan Ratha Krishnan wrote: > I am looking for a stata > command that will enable me to exclude individuals who have > experienced a particular life event more than once in my dataset. That depends on how your data is structured. I will assume ...
In addition to the decision of whether to include certain study types (i.e., published vs. unpublished studies), there can be other reasons to exclude studies that are identified in the search process. These reasons can be manifold and are primarily related to the specific research question an...
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Accurate measures of these behaviours are required, but it is unknown how self-reported estimates compare to those derived from objective measures. We sought to develop methods for objectively deriving time spent in specific travel behaviours from a combination of locational and activity data, and to...
> > "." means missing. With strings in Stata only the > empty string > > "" means missing. If you have strings "." that you > > regard as missing you should just exclude those if > desired > > by > > > > ... if COLOR != "." ...