Thank you all for the useful replies. I will go with the list of
matrices idea as suggested multiple times.
On Sat, Jun 16, 2012 at 6:50 PM, Jeff Newmiller
wrote:
> A data frame is a list of vectors all with the same length. Note that vectors
> have simple types. Sticking other types of object
A data frame is a list of vectors all with the same length. Note that vectors
have simple types. Sticking other types of objects into it violates the generic
constraint stated above, leading to incompatibility with many functions that
normally work with data frames.
If you want to maintain data
On Sat, Jun 16, 2012 at 06:14:38PM +0100, Onur Uncu wrote:
> Thank you. But isn't a data frame already a list?
Data frame is a list of columns. The suggestion was to use a list,
whose length is the number of rows and which contains a matrix
for each row.
> What is wrong with
> adding a column to
Hello,
Follow this example. It uses a list to hold the mortality curves.
Since there are only two different gender/age combinations, it first
gets all such unique combinations and then creates a list of the
appropriate length. Then assigns a matrix to the first list element.
DF <- read.table(
Thank you. But isn't a data frame already a list? What is wrong with
adding a column to the existing data frame (a column with the
mortality curve matrices)?
Sorry if I am being difficult. Just want to learn good design in R.
On Sat, Jun 16, 2012 at 5:49 PM, steven mosher wrote:
> use a list.
use a list. or create new class which is a list
On Jun 16, 2012 8:52 AM, "Onur Uncu" wrote:
> Hello R Community,
>
> I have the following design question. I have a data set that looks
> like this (shortened for the sake of example).
>
> Gender Age
> M 70
> F 65
> M
Hello R Community,
I have the following design question. I have a data set that looks
like this (shortened for the sake of example).
Gender Age
M 70
F 65
M 70
Each row represents a person with an age/gender combination. We could
put this data into a data frame.
N
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