Displaying 20 results from an estimated 183 matches for "forestri".
Did you mean:
forestry
2013 Oct 15
2
extract regression coefficients
Hello all!
I have a problem with R. I want to extract regression coefficients from
summary and use it for compute the theoretical values.
How can I do that in R?
thank you!
best regards,
--
---
Catalin-Constantin ROIBU
Lecturer PhD, Forestry engineer
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone +4 0230 52 29 78, ext. 531
mobile phone +4
2013 Apr 10
2
non linear equation
Hello all!
I have a problem with a double exponential equation.
this are my data's>
structure(list(proc = c(1870.52067384719, 766.789388745793,
358.701545859122,
237.113777545511, 43.2726259059654, 148.985133316262, 92.6242882655781,
88.4521557193262, 56.6404686159112, 27.0374477259404, 34.3347291080268,
18.3226992991316, 15.2196612445747, 5.31600719692165, 16.7015717397302,
2013 Mar 27
3
animated charts
Hello all!
I want to create animated chart of temperature variation in last century.
how can I do this with R?
Thank you!
--
---
Catalin-Constantin ROIBU
Forestry engineer, PhD
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone +4 0230 52 29 78, ext. 531
mobile phone +4 0745 53 18 01
+4 0766 71 76 58
FAX: +4
2013 Aug 26
4
transform variables
Dear all!
I have a data frame composed by 13 columns (year, and 12 months). I want to
transform this data base in another like this
year month values
1901 1
1901 2
1901 3
.....
1901 12
1902 1
1902 2
....
1902 12
Is there a possibility to succeed that in R?
Thank you!
best regards!
CR
--
---
Catalin-Constantin ROIBU
Lecturer PhD, Forestry engineer
Forestry Faculty of Suceava
Str.
2003 Sep 10
1
Opening files issue.
Hi all.
I've looked, and I do recall a posting from earlier addressing this, but I
can't get the right combo of key-words to google up the solution. If I open
a file (say a .doc) from windows explorer, the program launches and that
file loads quickly. If I use the open dialogue from the application, the
file loads slowly. Looking in performnce monitor I see that if I load the
file from
2013 Mar 29
1
problem with data
Hello all!
I have a problem with my data in R. When I want to plot the following data,
I have a problem with y scale. The maximum value is cc. 10 degrees and in R
is about 100.
I use this code:
fasy<-read.table("gridd1.txt",sep="\t",dec=",",header=T,row.names=1)
# here are the years:
x <- as.numeric(rownames(fasy))
# extract a series that you want to plot:
y
2013 Feb 10
2
exponential model in R
Dear R users,
I don't know how to compute an exponential model like this:
proc=a*exp(b*cls), or proc=a*exp(b*cls)+c*exp(d*cls). Please help me to
solve this problem!
Thank you!
My data is:
row.names proc cls
1 0.5 452.616206 0.5
2 1 255.864021 1.0
3 1.5 150.885316 1.5
4 2 86.289600 2.0
5 2.5 56.321559 2.5
6 3 39.504444 3.0
7 3.5 25.570308 3.5
8 4 5.382726 4.0
--
---
Catalin-Constantin
2011 May 03
2
Overlapping x axes using Lattice
Hi R users
I apologise in advance for this question as I suspect it is simple and
perhaps others have had this problem.
I am struggling to sort out how to fix the x axes so that the labels
don't overlap.
I have put the following example together to show my problem.
library(lattice)
titre <- as.factor(rep(c(10999,20999,30999,40999,50999,60999,
2013 Jan 08
2
plot residuals per factor
Dear R-users,
I want to plot residuals vs fitted for multiple groups with ggplot2.
I try this code, but unsuccessful.
library("plyr")
models<-dlply(dat1,"d",function(df)
mod<-lm(y~x,data=df)
ggplot(models,aes(.fitted,.resid), color=factor(d))+
geom_hline(yintercept=0,col="white",size=2)+
geom_point()+
geom_smooth(se=F)
--
---
Catalin-Constantin ROIBU
2008 Jun 06
3
R loop
I all
I am just trying to get the idea of a loop if statement for another
purpose. I was going to label a new variable based on date ie first week
1, second week 2 etc. My code in bold is wrong but seems logical to me,
could someone help.
x <-
rep(c(2660156,2663703,2658165,2659303,2661531,2660914),c(2,2,2,2,1,1))
y <-
rep(c(6476767,6475013,6475487,6479659,6477004,6476388),c(2,2,2,2,1,1))
2008 May 06
3
Spatial join between two datasets using x and y co-ordinates
Hi R users
I am trying to create a spatial join between two datasets.
The first data set is large and contains descriptive data including x
and y co-ordinates.
The second dataset is small and has been selected spatially. The only
data contained within the second dataset is the x and y coordinates only
i.e. no descriptive data.
The aim of a join made between the two datasets is to select
2009 Mar 17
3
Combining columns from two dataframes
I all
I am trying to combine columns from two dataframes to make a completely
new dataframe consisting of one column of dates (ie a combination of
dates from the two dataframes).
>From the following dataframes
a b
1 2008-07-27 1
2 2008-10-01 2
3 2008-08-15 3
4 2008-08-14 4
5 2008-08-14 5
6 2008-09-20 6
c d
1 2008-07-27 1
2 2008-10-01 2
I would like to get:
z
2013 Mar 13
2
merge datas
Hello all!
I have a problem with R. I try to merge data like this:
structure(c(2.1785, 1.868, 2.1855, 2.5175, 2.025, 2.435, 1.809,
1.628, 1.327, 1.3485, 1.4335, 2.052, 2.2465, 2.151, 1.7945, 1.79,
1.6055, 1.616, 1.633, 1.665, 2.002, 2.152, 1.736, 1.7985, 1.9155,
1.7135, 1.548, 1.568, 1.713, 2.079, 1.875, 2.12, 2.072, 1.906,
1.4645, 1.3025, 1.407, 1.5445, 1.437, 1.463, 1.5235, 1.609, 1.738,
1.478,
2011 Jul 19
4
Samba Share Access denied on Solaris
Hi
I have reinstalled the Solaris 10 server with update 9 and now runs
samba 3.5.5. I can log into the share but cannot open it. It says
permissions denied . I modified the permissions on OS but still face the
same error. Any kind of help will be appreciated.
Kind Regards
Dee
DISCLAIMER:
This message and any attachments are confidential and intended solely for the addressee. If
2007 Nov 18
2
Obtaining x-values from ECDF
Dear Group,
I am using the ecdf function as follows:
cawa.cdp <- ecdf(cawaocc$LEFF80)
summary(cawa.cdp)
Empirical CDF: 223 unique values with summary
Min. 1st Qu. Median Mean 3rd Qu. Max.
0.07918 1.35700 1.68600 1.61000 1.91200 2.70000
I can see by the summary that the y-value for the 3rd quartile is 1.912.
How can I obtain the x-value for a specified y-value (e.g., 0.8)?
2009 Dec 01
1
ggplot legend for multiple time series
Hello All,
I am trying to create a legend for a black-white graph. The package I
use is ggplot2. It can add colors to the legend key but not line types.
Can you please help?
# example from Wickman (2009, ggplot2 - elegant graphics for data
analysis, page 109)
library(ggplot2)
huron <- data.frame(year=1875:1972, level=LakeHuron)
ggplot(huron, aes(year)) +
2013 Feb 10
1
compute exponential model with R
Dear R users,
Please help me to compute an exponential model with R.
Thank you!
--
---
Catalin-Constantin ROIBU
Forestry engineer, PhD
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone +4 0230 52 29 78, ext. 531
mobile phone +4 0745 53 18 01
+4 0766 71 76 58
FAX: +4 0230 52 16 64
silvic.usv.ro
[[alternative
2009 Apr 01
4
Recode of text variables
Hi all
I am trying to do a simple recode which I am stumbling on. I figure
there must be any easy way but haven't come across it.
Given data of A","B","C","D","E","A" it would be nice to recode this
into say three categories ie A and B becomes "Treat1", C becomes "Treat
2" and E becomes "Treat 3".
I tried
2005 Sep 15
4
Error in vector("double", length) : vector size specified is too large....VLDs
I have what R seems to consider a very large dataset, a 12MB text file of
lat,long,and height values, 130,000 rows to be exact.
Here's what I get:
Thomas Colson
North Carolina State University
Department of Forestry and Environmental Resources
(919) 673 8023
tom_colson at ncsu.edu
Calendar:
www4.ncsu.edu/~tpcolson
2012 Nov 11
1
plot matrix
Dear R users,
I have a problem with plot option in R.
I want to plot all columns values in a single graph and the labels of x
axis the row names. I try to use matplot option, but I have a problem with
labels and thickness. I use a very complex data with 10 columns and 406
rows.
I use this code:
> matplot(data.matrix(data1), type="l",xaxt="n")
> axis(1,