Hello everyone, Is there any way to create a data.frame from scratch? other than, say, this?> structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label c("apple","banana", "kiwi", "orange", "pear"), class = "factor"), Color structure(c(3L, 4L, 1L, 2L, 1L), .Label = c("green", "orange", "red", "yellow" ), class = "factor"), Shape = structure(c(3L, 1L, 2L, 3L, 3L), .Label c("oblong", "pear", "round"), class = "factor"), Juice = c(1, 0, 0.5, 1, 0)), class = "data.frame", row.names = c("1", "2", "3", "4", "5")) which yields Fruit Color Shape Juice 1 apple red round 1.0 2 banana yellow oblong 0.0 3 pear green pear 0.5 4 orange orange round 1.0 5 kiwi green round 0.0 I get *that* it works. I just don't know *how* it works, and whether or not there is another, easier way... For example,> structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label c("apple", "banana", "kiwi", "orange", "pear") ...What on earth are these numbers? c(1L, 2L, 5L, 4L, 3L)? and why are they out of order? And then why put the fruits out of order? c("apple", "banana", "kiwi", "orange", "pear")? since that's not a descending order? since, in the final data.frame, it goes apple, banana, *pear*, *orange*, kiwi? So many questions! Drake [[alternative HTML version deleted]]
You seem to be trying to learn R ... sideways... or backwards, perhaps.
Have you read An Introduction to R[1], included with every copy of the
software? In particular, there are sections on data frames [2] (which
should be read in the context of the discussion on lists, as it
is presented. There is also the discussion of factors [3] where the idea
of using integers to keep track of categorical data is discussed. There
are many other introductory resources as well which would fill you in on
these kinds of basic concepts if you find the ItR too computerish.
No R programmer I have ever met constructs data frames by typing in the
kind of R you showed... that is distinctly characteristic of the
output of the "dput" function, which is completely general and precise
in
an R-language sense and useful in reproducing whatever data you have in
your R environment in someone elses environment.
So, one of these might be more typical:
dta1 <- data.frame( Fruit = c( "apple", "banana",
"pear", "orange", "kiwi" )
, Color = c( "red", "yellow",
"green", "orange", "green" )
, Shape = c( "round", "oblong",
"pear", "round", "round" )
, Juice = Juice = c( 1, 0, 0.5, 1, 0 )
)
dta2 <- read.table( text "Fruit Color Shape Juice
apple red round 1.0
banana yellow oblong 0.0
pear green pear 0.5
orange orange round 1.0
kiwi green round 0.0
", header = TRUE )
I would also strongly encourage you to read the Posting Guide mentioned at
the bottom of every posting on this mailing list. One issue with your
email is that sending HTML-formatted email to this list often leads to us
receiving gibberish because this is a text-only mailing list and the
translation from HTML to plain text is done differently by different mail
handling software. Please find the setting for your email software that
causes it to send plain text (Gmail has a button... you just have to look
for it). Another issue is that there is an expectation on this list that
you will have made some effort to wade through the documentation and at
least mention what documentation you looked at so interested people can
learn from your difficulty and possibly fix problems in the documentation
for future users.
[1] https://cran.r-project.org/doc/manuals/r-release/R-intro.html
[2] https://cran.r-project.org/doc/manuals/r-release/R-intro.html#Data-frames
[3] https://cran.r-project.org/doc/manuals/r-release/R-intro.html#Factors
On Fri, 19 Apr 2019, Drake Gossi wrote:
> Hello everyone,
>
> Is there any way to create a data.frame from scratch? other than, say,
this?
>
>> structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label >
c("apple",
> "banana", "kiwi", "orange",
"pear"), class = "factor"), Color > structure(c(3L,
> 4L, 1L, 2L, 1L), .Label = c("green", "orange",
"red", "yellow"
> ), class = "factor"), Shape = structure(c(3L, 1L, 2L, 3L, 3L),
.Label > c("oblong",
> "pear", "round"), class = "factor"), Juice =
c(1, 0, 0.5, 1,
> 0)), class = "data.frame", row.names = c("1",
"2", "3", "4",
> "5"))
>
>
> which yields
>
> Fruit Color Shape Juice
> 1 apple red round 1.0
> 2 banana yellow oblong 0.0
> 3 pear green pear 0.5
> 4 orange orange round 1.0
> 5 kiwi green round 0.0
>
>
> I get *that* it works. I just don't know *how* it works, and whether or
not
> there is another, easier way...
>
> For example,
>
>> structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label >
c("apple", "banana", "kiwi", "orange",
"pear") ...
>
>
> What on earth are these numbers? c(1L, 2L, 5L, 4L, 3L)? and why are they
> out of order?
>
> And then why put the fruits out of order? c("apple",
> "banana", "kiwi", "orange",
"pear")? since that's not a descending order?
> since, in the final data.frame, it goes apple, banana, *pear*, *orange*,
> kiwi?
>
> So many questions!
>
> Drake
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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Hi Structure is usefull for exchanging information and it is result of ?dput function. I wonder if anybody would like to use it for **creating** data frames. For creating data frames see functions like ?read.table, ?read.delim, or other ?read.* functions. Your questions are mainly adressed in R-intro which should be part of your R installation. Cheers Petr> -----Original Message----- > From: R-help <r-help-bounces at r-project.org> On Behalf Of Drake Gossi > Sent: Saturday, April 20, 2019 1:40 AM > To: r-help at r-project.org > Subject: [R] creating a data.frame from scratch > > Hello everyone, > > Is there any way to create a data.frame from scratch? other than, say, this? > > > structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label > c("apple", > "banana", "kiwi", "orange", "pear"), class = "factor"), Color = structure(c(3L, 4L, > 1L, 2L, 1L), .Label = c("green", "orange", "red", "yellow" > ), class = "factor"), Shape = structure(c(3L, 1L, 2L, 3L, 3L), .Label = c("oblong", > "pear", "round"), class = "factor"), Juice = c(1, 0, 0.5, 1, 0)), class > "data.frame", row.names = c("1", "2", "3", "4", > "5")) > > > which yields > > Fruit Color Shape Juice > 1 apple red round 1.0 > 2 banana yellow oblong 0.0 > 3 pear green pear 0.5 > 4 orange orange round 1.0 > 5 kiwi green round 0.0 > > > I get *that* it works. I just don't know *how* it works, and whether or not > there is another, easier way... > > For example, > > > structure(list(Fruit = structure(c(1L, 2L, 5L, 4L, 3L), .Label > c("apple", "banana", "kiwi", "orange", "pear") ... > > > What on earth are these numbers? c(1L, 2L, 5L, 4L, 3L)? and why are they out > of order? > > And then why put the fruits out of order? c("apple", "banana", "kiwi", > "orange", "pear")? since that's not a descending order? > since, in the final data.frame, it goes apple, banana, *pear*, *orange*, kiwi? > > So many questions! > > Drake > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code.Osobn? ?daje: Informace o zpracov?n? a ochran? osobn?ch ?daj? obchodn?ch partner? PRECHEZA a.s. jsou zve?ejn?ny na: https://www.precheza.cz/zasady-ochrany-osobnich-udaju/ | Information about processing and protection of business partner?s personal data are available on website: https://www.precheza.cz/en/personal-data-protection-principles/ D?v?rnost: Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a podl?haj? tomuto pr?vn? z?vazn?mu prohl??en? o vylou?en? odpov?dnosti: https://www.precheza.cz/01-dovetek/ | This email and any documents attached to it may be confidential and are subject to the legally binding disclaimer: https://www.precheza.cz/en/01-disclaimer/