[R] Create a list object in a loop
Dear all,
I'm trying to create a list of point patterns ppp.object {spatstat} in a loop.
My dataset looks like this:
names(OT1);head(OT1);dim(OT1)
[1] EID latitude longitude month year CPUE
TSUM
[8] fTSUM
EID latitude longitude month year CPUE TSUM fTSUM
1 167-1-1996-1135 67.7 -61.81667 9 199600 F
2 167-10-1996-1135 67.71667 -59.18333 9 199600 F
3 167-100-1996-1135 67.86667 -59.410 199600 F
4 167-101-1996-1135 67.95000 -59.5833310 199600 F
5 167-102-1996-1135 68.1 -59.7666710 199600 F
6 167-103-1996-1135 67.81667 -59.3833310 199600 F
[1] 27078
What I would like to do is to select data for each of my month and create a
ppp.object.
sort(unique(OT1$month))
[1] 7 8 9 10 11 12
The following loop works and I can see each of my figures:
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b,main=i)
}
How can I access each of my ppp.objects? I've tried adding a list() in the loop
command such that I can access the data but without any success... Any help
would be much appreciated!
Thank you!
__
R-help@r-project.org mailing list
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.
Re: [R] Create a list object in a loop
Hi Aurelie,
Please give this a look:
http://www.nealgroothuis.name/introduction-to-data-types-and-objects-in-r/
And see if this resolves most, or all, of your questions...
Contact
Details:---
Contact me: tal.gal...@gmail.com | 972-52-7275845
Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) |
www.r-statistics.com (English)
--
On Fri, Mar 9, 2012 at 5:48 PM, Aurelie Cosandey Godin god...@dal.cawrote:
Dear all,
I'm trying to create a list of point patterns ppp.object {spatstat} in a
loop.
My dataset looks like this:
names(OT1);head(OT1);dim(OT1)
[1] EID latitude longitude month year CPUE
TSUM
[8] fTSUM
EID latitude longitude month year CPUE TSUM fTSUM
1 167-1-1996-1135 67.7 -61.81667 9 199600 F
2 167-10-1996-1135 67.71667 -59.18333 9 199600 F
3 167-100-1996-1135 67.86667 -59.410 199600 F
4 167-101-1996-1135 67.95000 -59.5833310 199600 F
5 167-102-1996-1135 68.1 -59.7666710 199600 F
6 167-103-1996-1135 67.81667 -59.3833310 199600 F
[1] 27078
What I would like to do is to select data for each of my month and create
a ppp.object.
sort(unique(OT1$month))
[1] 7 8 9 10 11 12
The following loop works and I can see each of my figures:
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b,main=i)
}
How can I access each of my ppp.objects? I've tried adding a list() in the
loop command such that I can access the data but without any success... Any
help would be much appreciated!
Thank you!
__
R-help@r-project.org mailing list
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.
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
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.
Re: [R] Create a list object in a loop
You are overriding b at each loop iteration and consequently only
keeping the last one.
Perhaps
b - list()
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b[[i]]-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b[[i]],main=i)
}
Generally it's bad practice to have a dynamically growing object in R
but I think the performance penalty for lists isn't too bad. (Not
verified, I just think I saw that somewhere)
What might be even better:
months - sort(unique(OT1$month))
b - vector(list, length(months))
names(b) - months
for(i in months){
a-OT1[OT1$month==i,]
b[[i]]-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b[[i]],main=i)
}
Michael
On Fri, Mar 9, 2012 at 10:48 AM, Aurelie Cosandey Godin god...@dal.ca wrote:
Dear all,
I'm trying to create a list of point patterns ppp.object {spatstat} in a loop.
My dataset looks like this:
names(OT1);head(OT1);dim(OT1)
[1] EID latitude longitude month year CPUE
TSUM
[8] fTSUM
EID latitude longitude month year CPUE TSUM fTSUM
1 167-1-1996-1135 67.7 -61.81667 9 1996 0 0 F
2 167-10-1996-1135 67.71667 -59.18333 9 1996 0 0 F
3 167-100-1996-1135 67.86667 -59.4 10 1996 0 0 F
4 167-101-1996-1135 67.95000 -59.58333 10 1996 0 0 F
5 167-102-1996-1135 68.1 -59.76667 10 1996 0 0 F
6 167-103-1996-1135 67.81667 -59.38333 10 1996 0 0 F
[1] 2707 8
What I would like to do is to select data for each of my month and create a
ppp.object.
sort(unique(OT1$month))
[1] 7 8 9 10 11 12
The following loop works and I can see each of my figures:
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b,main=i)
}
How can I access each of my ppp.objects? I've tried adding a list() in the
loop command such that I can access the data but without any success... Any
help would be much appreciated!
Thank you!
__
R-help@r-project.org mailing list
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@r-project.org mailing list
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.
Re: [R] Create a list object in a loop
Thank you Tal, useful link.
Best,
Aurelie
On 2012-03-09, at 11:53 AM, Tal Galili wrote:
Hi Aurelie,
Please give this a look:
http://www.nealgroothuis.name/introduction-to-data-types-and-objects-in-r/
And see if this resolves most, or all, of your questions...
Contact
Details:---
Contact me: tal.gal...@gmail.com | 972-52-7275845
Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) |
www.r-statistics.com (English)
--
On Fri, Mar 9, 2012 at 5:48 PM, Aurelie Cosandey Godin god...@dal.ca wrote:
Dear all,
I'm trying to create a list of point patterns ppp.object {spatstat} in a loop.
My dataset looks like this:
names(OT1);head(OT1);dim(OT1)
[1] EID latitude longitude month year CPUE
TSUM
[8] fTSUM
EID latitude longitude month year CPUE TSUM fTSUM
1 167-1-1996-1135 67.7 -61.81667 9 199600 F
2 167-10-1996-1135 67.71667 -59.18333 9 199600 F
3 167-100-1996-1135 67.86667 -59.410 199600 F
4 167-101-1996-1135 67.95000 -59.5833310 199600 F
5 167-102-1996-1135 68.1 -59.7666710 199600 F
6 167-103-1996-1135 67.81667 -59.3833310 199600 F
[1] 27078
What I would like to do is to select data for each of my month and create a
ppp.object.
sort(unique(OT1$month))
[1] 7 8 9 10 11 12
The following loop works and I can see each of my figures:
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b,main=i)
}
How can I access each of my ppp.objects? I've tried adding a list() in the
loop command such that I can access the data but without any success... Any
help would be much appreciated!
Thank you!
__
R-help@r-project.org mailing list
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.
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
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.
Re: [R] Create a list object in a loop
Thank you very much Michael!
Best,
Aurelie
On 2012-03-09, at 11:56 AM, R. Michael Weylandt wrote:
You are overriding b at each loop iteration and consequently only
keeping the last one.
Perhaps
b - list()
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b[[i]]-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b[[i]],main=i)
}
Generally it's bad practice to have a dynamically growing object in R
but I think the performance penalty for lists isn't too bad. (Not
verified, I just think I saw that somewhere)
What might be even better:
months - sort(unique(OT1$month))
b - vector(list, length(months))
names(b) - months
for(i in months){
a-OT1[OT1$month==i,]
b[[i]]-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b[[i]],main=i)
}
Michael
On Fri, Mar 9, 2012 at 10:48 AM, Aurelie Cosandey Godin god...@dal.ca wrote:
Dear all,
I'm trying to create a list of point patterns ppp.object {spatstat} in a
loop.
My dataset looks like this:
names(OT1);head(OT1);dim(OT1)
[1] EID latitude longitude month year CPUE
TSUM
[8] fTSUM
EID latitude longitude month year CPUE TSUM fTSUM
1 167-1-1996-1135 67.7 -61.81667 9 199600 F
2 167-10-1996-1135 67.71667 -59.18333 9 199600 F
3 167-100-1996-1135 67.86667 -59.410 199600 F
4 167-101-1996-1135 67.95000 -59.5833310 199600 F
5 167-102-1996-1135 68.1 -59.7666710 199600 F
6 167-103-1996-1135 67.81667 -59.3833310 199600 F
[1] 27078
What I would like to do is to select data for each of my month and create a
ppp.object.
sort(unique(OT1$month))
[1] 7 8 9 10 11 12
The following loop works and I can see each of my figures:
for(i in sort(unique(OT1$month))){
a-OT1[OT1$month==i,]
b-ppp(a$longitude,a$latitude,marks=a$fTSUM,window=newW)
plot(b,main=i)
}
How can I access each of my ppp.objects? I've tried adding a list() in the
loop command such that I can access the data but without any success... Any
help would be much appreciated!
Thank you!
__
R-help@r-project.org mailing list
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@r-project.org mailing list
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.
