Re: [R] help with reshape

[Ivan Calandra]

Thank you Petr,

It kinda works, but not completely. The problem is that it produces a 
column for each value ("Moyenne"), and not each element of "Elem". That 
means I have only one value per column, instead of up to 3.
For example, I have 3 columns for Al1670 instead of just one, and each 
column contains maximum one value (the others being NA).

Not sure I am being clear...

By the way, I don't understand why my solution did not work; what is 
wrong there?

Thank you again!
Ivan

--
Ivan Calandra, PhD
University of Reims Champagne-Ardenne
GEGENAA - EA 3795
CREA - 2 esplanade Roland Garros
51100 Reims, France
+33(0)3 26 77 36 89
ivan.calan...@univ-reims.fr
https://www.researchgate.net/profile/Ivan_Calandra

Le 08/09/15 14:04, PIKAL Petr a écrit :
Hi

I am not sure if I got it

library(reshape2)
mm<-melt(mydata, measure.vars="Moyenne")
test <- dcast(mm, Etape+Ech+repet+dilution+Rincage~Elem+value)

gives me 3 rows but names need some tweaking afterwards.

nn<-paste("Moyenne", unlist(lapply(strsplit(names(test)[-(1:5)], "_"), "[", 1)), 
sep=".")
names(test)[-(1:5)]<-nn

Cheers
Petr


-----Original Message-----
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Ivan
Calandra
Sent: Tuesday, September 08, 2015 12:33 PM
To: R list
Subject: [R] help with reshape

Dear users,

I'm having troubles with reshaping a data.frame from long to wide
format.
I copy the output of dput() at the end of the mail because it is quite
long.

Each row of the column "Elem" should be transposed to a new column. All
variables "Etape", "Ech", "repet", "dilution", "Rincage" define the
samples. Meaning that for each unique combination of these variables, I
want a single row, and as many columns as elements in "Elem".

So I tried:
reshape(mydata, timevar="Elem",
idvar=c("Etape","Ech","repet","dilution","Rincage"), direction="wide",
drop=c("ID","Nom_ech"))

The problem is that some columns are not used at all for defining
samples. In this case, the row "S1, F10-3, NA, 1, oui" is missing, but
I don't understand why.

Can you help me with that? I have no idea what I am doing wrong...

Thanks in advance,
Ivan



mydata <- structure(list(ID = c(543, 544, 545, 546, 547, 548, 549, 550,
551, 552, 553, 554, 555, 556, 557, 558, 559, 560, 561, 562, 11574,
11575, 11576, 11577, 11578, 11579, 11580, 11581, 11582, 11583, 683,
684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697,
698, 699, 700, 701, 702), Nom_ech = c("Step1 B2", "Step1 B2",
"Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2",
"Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2",
"Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2", "Step1 B2",
"R1 S1 F1 0-3", "R1 S1 F1 0-3", "R1 S1 F1 0-3", "R1 S1 F1 0-3",
"R1 S1 F1 0-3", "R1 S1 F1 0-3", "R1 S1 F1 0-3", "R1 S1 F1 0-3",
"R1 S1 F1 0-3", "R1 S1 F1 0-3", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1)
*100",
"S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100",
"S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100",
"S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100",
"S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100",
"S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100",
"S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100", "S1 F1 0-3 (1) *100"
), Etape = c("S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1",
"S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1",
"S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1",
"S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1", "S1",
"S1", "S1", "S1", "S1", "S1"), Ech = c("B2", "B2", "B2", "B2", "B2",
"B2", "B2", "B2", "B2", "B2", "B2", "B2", "B2", "B2", "B2", "B2", "B2",
"B2", "B2", "B2", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3",
"F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3",
"F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3",
"F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3", "F10-3"
), repet = c(NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1), dilution = c(1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100,
100, 100, 100, 100, 100, 100, 100, 100, 100), Rincage = c("non", "non",
"non", "non", "non", "non", "non", "non", "non", "non", "non", "non",
"non", "non", "non", "non", "non", "non", "non", "non", "oui", "oui",
"oui", "oui", "oui", "oui", "oui", "oui", "oui", "oui", "non", "non",
"non", "non", "non", "non", "non", "non", "non", "non", "non", "non",
"non", "non", "non", "non", "non", "non", "non", "non"), Elem =
c("Al1670", "As1890", "As1937", "Ca1840", "Ca3158", "Cd2288", "Co2286",
"Co2378", "Cr2055", "Cr2835", "Cu2247", "Cu3247", "Fe2382", "Fe2599",
"K_7664", "Mg2795", "Mg2852", "Mn2576", "Mn2605", "Ni2216", "Al1670",
"As1890", "As1937", "Ca1840", "Ca3158", "Cd2288", "Co2286", "Co2378",
"Cr2055", "Cr2835", "Al1670", "As1890", "As1937", "Ca1840", "Ca3158",
"Cd2288", "Co2286", "Co2378", "Cr2055", "Cr2835", "Cu2247", "Cu3247",
"Fe2382", "Fe2599", "K_7664", "Mg2795", "Mg2852", "Mn2576", "Mn2605",
"Ni2216"), Moyenne = c(NA, NA, 3.7455, 596.166666666667, 578.2, 0.1514,
NA, 1.87225, NA, 0.3664, 1.859, 1.96766666666667, NA, NA,
9.29566666666667, 13.08, 12.69, 0.26875, 0.2877, 0.2395,
5732.33333333333, 3.9615, 3.48833333333333, 337.433333333333,
323.533333333333, 0.877166666666667, 0.292466666666667, NA,
1.79566666666667, NA, 106.326666666667, NA, 2.2755, 291.933333333333,
278.833333333333, 0.819, NA, 3.946, NA, NA, 1.47766666666667,
1.63266666666667, 40.44, 40.2533333333333, 128.9, 50.11, 49.02,
37.4733333333333, 37.775, 0.3764)), .Names = c("ID", "Nom_ech",
"Etape", "Ech", "repet", "dilution", "Rincage", "Elem", "Moyenne"),
row.names = c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L,
14L, 15L, 16L, 17L, 18L, 19L, 20L, 29L, 30L, 31L, 32L, 33L, 34L, 35L,
36L, 37L, 38L, 112L, 113L, 114L, 115L, 116L, 117L, 118L, 119L, 120L,
121L, 122L, 123L, 124L, 125L, 126L, 127L, 128L, 129L, 130L, 131L ),
class = c("tbl_df", "tbl", "data.frame"))

--

Ivan Calandra, PhD
University of Reims Champagne-Ardenne
GEGENAA - EA 3795
CREA - 2 esplanade Roland Garros
51100 Reims, France
+33(0)3 26 77 36 89
ivan.calan...@univ-reims.fr
https://www.researchgate.net/profile/Ivan_Calandra

______________________________________________
R-help@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.
________________________________
Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny 
pouze jeho adresátům.
Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně 
jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze 
svého systému.
Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento email 
jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat.
Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou modifikacemi či 
zpožděním přenosu e-mailu.

V případě, že je tento e-mail součástí obchodního jednání:
- vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a 
to z jakéhokoliv důvodu i bez uvedení důvodu.
- a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout; 
Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany příjemce 
s dodatkem či odchylkou.
- trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným 
dosažením shody na všech jejích náležitostech.
- odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost 
žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo písemně 
pověřen a takové pověření nebo plná moc byly adresátovi tohoto emailu případně 
osobě, kterou adresát zastupuje, předloženy nebo jejich existence je adresátovi 
či osobě jím zastoupené známá.

This e-mail and any documents attached to it may be confidential and are 
intended only for its intended recipients.
If you received this e-mail by mistake, please immediately inform its sender. 
Delete the contents of this e-mail with all attachments and its copies from 
your system.
If you are not the intended recipient of this e-mail, you are not authorized to 
use, disseminate, copy or disclose this e-mail in any manner.
The sender of this e-mail shall not be liable for any possible damage caused by 
modifications of the e-mail or by delay with transfer of the email.

In case that this e-mail forms part of business dealings:
- the sender reserves the right to end negotiations about entering into a 
contract in any time, for any reason, and without stating any reasoning.
- if the e-mail contains an offer, the recipient is entitled to immediately 
accept such offer; The sender of this e-mail (offer) excludes any acceptance of 
the offer on the part of the recipient containing any amendment or variation.
- the sender insists on that the respective contract is concluded only upon an 
express mutual agreement on all its aspects.
- the sender of this e-mail informs that he/she is not authorized to enter into 
any contracts on behalf of the company except for cases in which he/she is 
expressly authorized to do so in writing, and such authorization or power of 
attorney is submitted to the recipient or the person represented by the 
recipient, or the existence of such authorization is known to the recipient of 
the person represented by the recipient.

______________________________________________
R-help@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.