Displaying 20 results from an estimated 2000 matches similar to: "Problem in 'Apply' function: does anybody have other solution"
2009 Jun 10
1
R: Best way to plot a Matrix of all possible pair combinations
Hallo R Users,
Please help
I have some distance matrix data like
> M[1:10,]
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 0.8750000 0.5000000 0.5000000 0.3750000 0.6250000 0.00000000
[2,] 0.8928571 1.0000000 0.0000000 0.8928571 0.1071429 0.00000000
[3,] 0.8928571 1.0000000 0.0000000 0.8928571 0.1071429 0.00000000
[4,] 0.8928571 1.0000000 0.0000000 0.8928571
2009 Jun 07
2
Need some help in R : value more than equals to a row.
Hallo,
I was trying some code, but couldn't make one step of the code properly.
Can anybody please help me?
I have one matrix like this
> values
[,1] [,2] [,3] [,4] [,5]
[1,] 0.7777778 0.36111111 0.22222222 0.1388889 0.0000000
[2,] 1.0000000 0.00000000 0.53846154 0.0000000 0.5384615
[3,] 0.5200000 0.48000000 0.64000000 0.0000000 0.8800000
[4,] 0.8928571
2013 May 22
1
Rplot save problem after using "identify" with R version 3.0.0
Hello R experts,
I am having an wired problem to save my RPlot after I use "identify"
option.
Points are identified properly, but when I try to save that image I get
error as:
" Error: first argument must be a string (of length 1) or native symbol
reference" and the image without identified points are saved. I am having
this problem after I upgraded to R version 3.0.0. (Mac).
2010 Jan 11
1
Forming Portfolios for Fama / French Regression
Hi mates,
I have a problem. I am new to R and want to conduct the Fama/French asset
pricing test. As I am from Germany, I cannot use the already computed
factors from French's website, but need to compute them myself. So I have to
sort a number of stocks into different portfolios using one factor, then
subdivide these portfolios into several more using another factor, then
compute portfolio
2009 May 31
1
warning message when running quantile regression
Hi All,
I am running quantile regression in a "for loop" starting with 1
variable and adding a variable at a time reaching a maximum of 20
variables.
I get the following warning messages after my "for" loop runs. Should I
be concerned about these messages? I am building predictive models and
am not interested in inference.
Warning messages:
1: In
2009 Nov 05
3
Bhattacharyya distance metric
I need to use the Bhattacharyya distance metric to determine population
separation. Has anyone written a Bhattacharyya distance metric function in
R?
--
View this message in context: http://old.nabble.com/Bhattacharyya-distance-metric-tp26221259p26221259.html
Sent from the R help mailing list archive at Nabble.com.
2008 Dec 03
2
reading version 9 SAS datasets in R
Hi,
I am trying to read a SAS version 9.1.3 SAS dataset into R (to preserve
the SAS labels), but am unable to do so (I have read in a CSV version).
I first created a transport file using the SAS code:
libname ces2 'D:\CES Analysis\Data';
filename transp 'D:\CES Analysis\Data\fadata.xpt';
/* create a transport file - R cannot read file created by proc cport */
proc
2009 Jun 07
1
Inf in nnet final value for validation data
Hi,
I use nnet for my classification problem and have a problem concerning the calculation of the final value for my validation data.(nnet only calculates the final value for the training data). I made my own final value formula (for the training data I get the same value as nnet):
# prob-matrix
pmatrix <- cat*fittedValues
tmp <- rowSums(pmatrix)
# -log likelihood
2009 Sep 21
3
compute differences
Hi,
I have a problem.
I have a data frame looking like:
ID val
A? .3
B? 1.2
C? 3.4
D? 2.2
E? 2.0
I need to CREATE the following TABLE:
CASE?? DIFF
A-A??? 0
A-B??? -0.9
A-C??? -3.1
A-D??? -1.9
A-E??? -1.7
B-A??? ...
B-B??? ...
B-C
B-D
B-E
C-A
C-B
C-C
C-D
C-E
D-A
D-B
D-C
D-D
D-E
E-A
E-B
E-C
E-D
E-E
WHERE CASE IS THE COUPLE OF ELEMENTS CONSIDEREDM AND DIFF IS THE computed DIFFERENCE between
2009 Jun 09
2
Comparing R and SAs
Hi:
For those of you who are adept at both SAS and R, I have the following questions:
a) What are some reasons / tasks for which you would use R over SAS and vice versa?
b) What are some things for which R is a must have that SAS cannot fulfill the requirements?
I am on the ramp up on both of them. The general feeling that I am getting by following this group is that R updates to the product are
2009 May 29
1
Backpropagation to adjust weights in a neural net when receiving new training examples
I want to create a neural network, and then everytime it receives new data,
instead of creating a new nnet, i want to use a backpropagation algorithm
to adjust the weights in the already created nn.
I'm using nnet package, I know that nn$wts gives the weights, but I cant
find out which weights belong to which conections so I could implement the
backpropagation algorithm myself.
But if anyone
2009 May 27
3
Neural Network resource
Hi All,
I am trying to learn Neural Networks. I found that R has packages which can help build Neural Nets - the popular one being AMORE package. Is there any book / resource available which guides us in this subject using the AMORE package?
Any help will be much appreciated.
Thanks,
Indrajit
2009 Jun 19
4
Recursive partitioning algorithms in R vs. alia
Dear R-helpers,
I had a conversation with a guy working in a "business intelligence"
department at a major Spanish bank. They rely on recursive partitioning
methods to rank customers according to certain criteria.
They use both SAS EM and Salford Systems' CART. I have used package R
part in the past, but I could not provide any kind of feature comparison
or the like as I have no
2011 Apr 06
1
Creating a symmetric contingency table from two vectors with different length of levels in R
Hello,
How can I create a symmetric contingency table from two categorical vectors
having different length of levels?
For example one vector has 98 levels
TotalData1$Taxa.1
[1] "Aconoidasida" "Actinobacteria (class)"
"Actinopterygii" "Alphaproteobacteria"
[5] "Amoebozoa"
2011 Apr 14
1
Error is assocplot
Hello,
I have a contingency table showing relation between two datasets. I tried
to see association among them with the assocplot, but it shows
error. mosaicplot of the same data worked perfectly.
Can anyone please help me.
Con.table=as.matrix(Con.table)
> dim(Con.table)
[1] 27 27
> assocplot(Con.table,space = 0.3,
+ main = NULL, xlab = NULL, ylab = NULL)
Error in
2013 May 17
1
Problem with ordiellipse coloured factor in Vegan
Hello R experts,
I am trying to plot ordiellipse for my data but the col according to
factors.
Metabolites_raw= read.csv(file.choose(), head = TRUE) #file
21Metabolites.csv
Metabolites_t=t(Metabolites_raw[,2:82])
ord <- metaMDS(Metabolites_t, distance="bray")
symbol=as.numeric(Metab_metadata$LandType)
col.list <-
2008 Nov 27
1
Help processing large data
Dear all,
I have one problem to handle a large dataset...
It looks like:
"read" "no" "length"
2 2 144
7 7 47490
9 9 310944
11 11 10089
14 14 13152
17 17 27363 and so on
There are 130000 rows
>From this table I need to make a table like
2_1 2 100
2_2 2 44
7_1 7 100
7_2 7 100
...
...
7_474 7 100
7_475 7 90
9_1 9 100
9_2 9 100 and so on...
In words: I want to
2006 Feb 21
2
Bug#353868: logcheck-database: no longer ignores "spamd: checking message ..."
Package: logcheck-database
Version: 1.2.43a
Severity: minor
Since last weekend's upgrade of logcheck-database from 1.2.42 to
1.2.43a, logcheck stopped ignoring routine SpamAssassin messages of
the form
Feb 20 21:36:16 tux64 spamd[4665]: spamd: checking message <20060220190721.0E0B41C5207 at llwb563.servidoresdns.net> for amu:7286
Could you please edit the second pattern in
2014 Feb 04
2
Question on support for Upsonic Commercial UPS CXR 2000 - 2000VA/1200W - Rack/Tower on Freebsd 9.1.
Charles,
Here is the output:
ugen1.3: <USB UPS PPC> at usbus1, cfg=0 md=HOST spd=LOW (1.5Mbps) pwr=ON
bLength = 0x0012
bDescriptorType = 0x0001
bcdUSB = 0x0200
bDeviceClass = 0x0000
bDeviceSubClass = 0x0000
bDeviceProtocol = 0x0000
bMaxPacketSize0 = 0x0008
idVendor = 0x06da
idProduct = 0x0005
bcdDevice = 0x0003
iManufacturer = 0x0003 <PPC>
2004 Aug 10
1
Error message in function mars() in package mda
Hi,
I am using function mars() in package mda to find knots in a whole bunch
of predictor variables. I hope to be able to replicate all or some of
the basis functions that the MARS software from Salford Systems creates.
When I ran mars() on a small dataset, I was able to get the knots.
However, when I tried running mars() on a larger dataset (145 predictor
variables), for a different