Hello,
I am working on a Coursera assignment and have combined 332 files into a
single data frame called "dat". The dataframe has 4 columns,
1. Date
2. Sulfate (numerical values)
3. Nitrate (numerical values)
4. ID # (numerical values).
Our assignment is to write a function pollutantmean <- function(directory,
pollutant, ID). whereby we can calculate the mean by inputting the
pollutant name and ID #.
I have reached the stage of subsetting the date e.g. by ID # 1-10, however
when I do so and then calculate the mean of this subset I receive the NaN
message (even though I have instructed R to disregard the "NA"'s).
*Beginning Code: *
getwd()
read.csv(specdata)
specdata <- ("C:/Users/rober/specdata")
list.files(specdata)
files_full <- list.files(specdata, full.names=TRUE)
files_full
dat <- data.frame()
for (i in 1:332){
dat <- rbind(dat,read.csv(files_full[i]))
}
str(dat)
mean(dat$sulfate, na.rm=TRUE)
*Code which generated the NaN message. *
dat1_10 <- dat[which(dat[,ID] ==1:10),]
mean(dat1_10$sulfate, na.rm=TRUE)
Am I making a mistake in subsetting the rows with ID's 1:10? Any advice
would be appreciated.
Thank you,
Robert
Robert J. Piliero
Cell: (617) 283 1020
38 Linnaean St. #6
Cambridge, MA, 02138
USA
Receiving NaN message
5 messages · Robert Piliero, Jim Lemon, PIKAL Petr +2 more
Hi Robert, There is a policy of not doing people's homework for them on the list. Nevertheless, I would advise you to read up on how to use the comparison operator (==). Good luck. Jim On Tue, Jan 17, 2017 at 7:10 AM, Robert Piliero
<robert.piliero at gmail.com> wrote:
Hello,
I am working on a Coursera assignment and have combined 332 files into a
single data frame called "dat". The dataframe has 4 columns,
1. Date
2. Sulfate (numerical values)
3. Nitrate (numerical values)
4. ID # (numerical values).
Our assignment is to write a function pollutantmean <- function(directory,
pollutant, ID). whereby we can calculate the mean by inputting the
pollutant name and ID #.
I have reached the stage of subsetting the date e.g. by ID # 1-10, however
when I do so and then calculate the mean of this subset I receive the NaN
message (even though I have instructed R to disregard the "NA"'s).
*Beginning Code: *
getwd()
read.csv(specdata)
specdata <- ("C:/Users/rober/specdata")
list.files(specdata)
files_full <- list.files(specdata, full.names=TRUE)
files_full
dat <- data.frame()
for (i in 1:332){
dat <- rbind(dat,read.csv(files_full[i]))
}
str(dat)
mean(dat$sulfate, na.rm=TRUE)
*Code which generated the NaN message. *
dat1_10 <- dat[which(dat[,ID] ==1:10),]
mean(dat1_10$sulfate, na.rm=TRUE)
Am I making a mistake in subsetting the rows with ID's 1:10? Any advice
would be appreciated.
Thank you,
Robert
Robert J. Piliero
Cell: (617) 283 1020
38 Linnaean St. #6
Cambridge, MA, 02138
USA
[[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.
Hi And above what Jim adviced you should look also at ?match help page. Cheers Petr
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Robert
Piliero
Sent: Monday, January 16, 2017 9:10 PM
To: r-help at r-project.org
Subject: [R] Receiving NaN message
Hello,
I am working on a Coursera assignment and have combined 332 files into a
single data frame called "dat". The dataframe has 4 columns,
1. Date
2. Sulfate (numerical values)
3. Nitrate (numerical values)
4. ID # (numerical values).
Our assignment is to write a function pollutantmean <- function(directory,
pollutant, ID). whereby we can calculate the mean by inputting the pollutant
name and ID #.
I have reached the stage of subsetting the date e.g. by ID # 1-10, however
when I do so and then calculate the mean of this subset I receive the NaN
message (even though I have instructed R to disregard the "NA"'s).
*Beginning Code: *
getwd()
read.csv(specdata)
specdata <- ("C:/Users/rober/specdata")
list.files(specdata)
files_full <- list.files(specdata, full.names=TRUE) files_full dat <- data.frame()
for (i in 1:332){
dat <- rbind(dat,read.csv(files_full[i]))
}
str(dat)
mean(dat$sulfate, na.rm=TRUE)
*Code which generated the NaN message. *
dat1_10 <- dat[which(dat[,ID] ==1:10),]
mean(dat1_10$sulfate, na.rm=TRUE)
Am I making a mistake in subsetting the rows with ID's 1:10? Any advice
would be appreciated.
Thank you,
Robert
Robert J. Piliero
Cell: (617) 283 1020
38 Linnaean St. #6
Cambridge, MA, 02138
USA
[[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.
________________________________ Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou ur?eny pouze jeho adres?t?m. Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav? neprodlen? jeho odes?latele. Obsah tohoto emailu i s p??lohami a jeho kopie vyma?te ze sv?ho syst?mu. Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento email jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat. Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi ?i zpo?d?n?m p?enosu e-mailu. V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?: - vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en? smlouvy, a to z jak?hokoliv d?vodu i bez uveden? d?vodu. - a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout; Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany p??jemce s dodatkem ?i odchylkou. - trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve v?slovn?m dosa?en?m shody na v?ech jej?ch n?le?itostech. - odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za spole?nost ??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n nebo p?semn? pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto emailu p??padn? osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich existence je adres?tovi ?i osob? j?m zastoupen? zn?m?. 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.
Hello, And in addition to what Jim and Petr said, take a look at ?%in%. Rui Barradas Em 17-01-2017 10:50, PIKAL Petr escreveu:
Hi And above what Jim adviced you should look also at ?match help page. Cheers Petr
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Robert
Piliero
Sent: Monday, January 16, 2017 9:10 PM
To: r-help at r-project.org
Subject: [R] Receiving NaN message
Hello,
I am working on a Coursera assignment and have combined 332 files into a
single data frame called "dat". The dataframe has 4 columns,
1. Date
2. Sulfate (numerical values)
3. Nitrate (numerical values)
4. ID # (numerical values).
Our assignment is to write a function pollutantmean <- function(directory,
pollutant, ID). whereby we can calculate the mean by inputting the pollutant
name and ID #.
I have reached the stage of subsetting the date e.g. by ID # 1-10, however
when I do so and then calculate the mean of this subset I receive the NaN
message (even though I have instructed R to disregard the "NA"'s).
*Beginning Code: *
getwd()
read.csv(specdata)
specdata <- ("C:/Users/rober/specdata")
list.files(specdata)
files_full <- list.files(specdata, full.names=TRUE) files_full dat <- data.frame()
for (i in 1:332){
dat <- rbind(dat,read.csv(files_full[i]))
}
str(dat)
mean(dat$sulfate, na.rm=TRUE)
*Code which generated the NaN message. *
dat1_10 <- dat[which(dat[,ID] ==1:10),]
mean(dat1_10$sulfate, na.rm=TRUE)
Am I making a mistake in subsetting the rows with ID's 1:10? Any advice
would be appreciated.
Thank you,
Robert
Robert J. Piliero
Cell: (617) 283 1020
38 Linnaean St. #6
Cambridge, MA, 02138
USA
[[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.
________________________________ Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou ur?eny pouze jeho adres?t?m. Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav? neprodlen? jeho odes?latele. Obsah tohoto emailu i s p??lohami a jeho kopie vyma?te ze sv?ho syst?mu. Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento email jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat. Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi ?i zpo?d?n?m p?enosu e-mailu. V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?: - vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en? smlouvy, a to z jak?hokoliv d?vodu i bez uveden? d?vodu. - a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout; Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany p??jemce s dodatkem ?i odchylkou. - trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve v?slovn?m dosa?en?m shody na v?ech jej?ch n?le?itostech. - odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za spole?nost ??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n nebo p?semn? pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto emailu p??padn? osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich existence je adres?tovi ?i osob? j?m zastoupen? zn?m?. 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 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.
And (re: "dat[,ID]"), the page on "Extract or Replace Parts of an Object": ? Extract ------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Rui Barradas Sent: Tuesday, January 17, 2017 5:51 AM To: PIKAL Petr <petr.pikal at precheza.cz>; Robert Piliero <robert.piliero at gmail.com>; r-help at r-project.org Subject: Re: [R] Receiving NaN message Hello, And in addition to what Jim and Petr said, take a look at ?%in%. Rui Barradas Em 17-01-2017 10:50, PIKAL Petr escreveu:
Hi And above what Jim adviced you should look also at ?match help page. Cheers Petr
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Robert
Piliero
Sent: Monday, January 16, 2017 9:10 PM
To: r-help at r-project.org
Subject: [R] Receiving NaN message
Hello,
I am working on a Coursera assignment and have combined 332 files into a
single data frame called "dat". The dataframe has 4 columns,
1. Date
2. Sulfate (numerical values)
3. Nitrate (numerical values)
4. ID # (numerical values).
Our assignment is to write a function pollutantmean <- function(directory,
pollutant, ID). whereby we can calculate the mean by inputting the pollutant
name and ID #.
I have reached the stage of subsetting the date e.g. by ID # 1-10, however
when I do so and then calculate the mean of this subset I receive the NaN
message (even though I have instructed R to disregard the "NA"'s).
*Beginning Code: *
getwd()
read.csv(specdata)
specdata <- ("C:/Users/rober/specdata")
list.files(specdata)
files_full <- list.files(specdata, full.names=TRUE) files_full dat <- data.frame()
for (i in 1:332){
dat <- rbind(dat,read.csv(files_full[i]))
}
str(dat)
mean(dat$sulfate, na.rm=TRUE)
*Code which generated the NaN message. *
dat1_10 <- dat[which(dat[,ID] ==1:10),]
mean(dat1_10$sulfate, na.rm=TRUE)
Am I making a mistake in subsetting the rows with ID's 1:10? Any advice
would be appreciated.
Thank you,
Robert
Robert J. Piliero
Cell: (617) 283 1020
38 Linnaean St. #6
Cambridge, MA, 02138
USA
[[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.
________________________________ Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou ur?eny pouze jeho adres?t?m. Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav? neprodlen? jeho odes?latele. Obsah tohoto emailu i s p??lohami a jeho kopie vyma?te ze sv?ho syst?mu. Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento email jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat. Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi ?i zpo?d?n?m p?enosu e-mailu. V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?: - vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en? smlouvy, a to z jak?hokoliv d?vodu i bez uveden? d?vodu. - a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout; Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany p??jemce s dodatkem ?i odchylkou. - trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve v?slovn?m dosa?en?m shody na v?ech jej?ch n?le?itostech. - odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za spole?nost ??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n nebo p?semn? pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto emailu p??padn? osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich existence je adres?tovi ?i osob? j?m zastoupen? zn?m?. 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 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.
______________________________________________ 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.