Displaying 20 results from an estimated 300 matches similar to: "Wind roses"
2000 Mar 17
2
Windows Memory
I'm sure this question is answered in the help file, but likely I'm not reading it corrected.
Running windows version 1.00.0, loading a table (35K rows by 10 columns) from Excel using the read.table command I receive the following message.
Error: cons memory (350000 cells) exhausted
See "help(Memory)" on how to increase the number of cons cells.
>From reading the
2002 May 16
3
Wind rose plots?
Just out of curiosity, has anyone created wind roses using R?
Thanks.
Tosh
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2010 Oct 01
1
plotting wind rose data (Karl Ropkins)
David,
Following on from Jim Lemon's suggest that polar plots might be more what you need, there are both wind rose and polar plot functions in the openair package that might be of use (particularly windRose and polarFreq). They will not do everthing you are after without some careful conditioning or extra work with latticeExtra, but could get you some of the way there.
Karl Ropkins,
2010 Sep 30
2
plotting wind rose data
Hi List,
I am trying to create a spatial representation of some wind data.
I have the season, frequency, strength and direction of the wind from 10
different locations, the coverage of the area that I am interested in is
not 100% there are small gaps in my coverage due to the location of the
weather stations.
I am trying to create a series of wind maps e.g. the Prevailing Winds, the
maximum
2006 Aug 16
7
Forward of moderated message
OK I know whats happening. Your while loop completes and calls kill
on the worker before your task_progress controller method ever gets
called> So the worker is deleted and when you try to access it from
rails you get an error because there is no longer a worker at that
job key. The kill method is meant to be used within a worker that you
fire and forget. If you want to get the
2001 Feb 10
3
Scatterplot - symbols coded by factor
Hi - I would like to create a scatterplot with the symbols coded by a factor in each record. Is their a better way than what I have used below? I attempted to use the plot.factor, but cannot force it to make a scatterplot instead of boxplots. I have considerd making a function with a 'for' statement for each level of the factor. Is there a better way for when I am dealing with more
2003 Dec 19
2
generic/method consistency
Hi,
I realize the answer is very likely in the section Generic functions and
methods (or Adding new generics), but I'm not clear what to do with the
following. Running R CMD check, I get the following warnings for my
generic functions. Does this mean I need the argument
* checking generic/method consistency ... WARNING
leps:
function(x, ...)
leps.default:
function(x, pred, titl,
2004 Mar 29
1
Interesting Behavior in plot()
I have a 2 by 226200 table, conveniently read in by read.table(), which
exhibits some strange behavior when plotted by plot(V1,V2). The general
pattern for the range of windspeeds, [0<V1<50] is as expected -- the wind
gust falls in the interval [V1<V2<65] except for certain values of V2.
For V2 == c(15,26,37,48,59), the V2 values are positioned at one-tenth of
the V1 (i.e., as if I
2001 Nov 07
2
Filtering data
Hello,
I am having difficulty filtering data. I am working with flow data
collected at a stream gage. For each record, I have a date and flow
value. I have filtered this data to only include days when flow values
exceed a given threshold.
Here is my problem. Within this subset of data, I often have several
consecutive days above the threshold. From this group of days, I wish to
select the
2004 Jul 27
1
lattice.device in loop
Hi,
I am having problems creating a pdf file of a lattice graph. Things work
fine for a single image, but I am having trouble using the commands in a
loop. To illustrate by example
This works with both ps and pdf files.
dat = list(x= 1:10, y = 1:10)
trellis.device(postscript, file = "/d1/pocernic/test.ps")
xyplot(y~x, data = dat)
dev.off()
This does not. It produces a very
2004 Jul 28
2
lattice variable by page
Hi,
Using lattice's xyplot, is it possible to specify a variable to group
plots by page. For example, if I have
xyplot(y~x|A*B*C)
could I get a page created for each unique value in
variable C ? I am hoping to avoid having pages with the same strip above
each plot on a page.
Thanks,
M
Matt Pocernich
NCAR - Research Applications Program
303-497-8312
2003 Mar 22
22
SecuRemote and Shorewall Problem
Sat Mar 22 14:16:55 CST 2003
This post is a bit long, but I want to make sure
I am providing the information up front that can
help in others helping me solve this mystery.
I am having a bit of difficulty getting Shorewall
to work with SecuRemote and its FW-1 server. I
have attached the "rules" file I am using and the
output of "shorewall show nat". The diagram below
2004 Mar 04
2
lattice, different plotting symbols
Hi,
I am trying to plot different variables from a data.frame using lattice's
xyplot using code like that below. How do I specify a symbol and color
for the variable 'prob' and different one's for 'll.prob'?
Thanks, Matt
xyplot( prob + ll.prob ~ time.eff |stat.id + time.out ,data = OUT,
allow.multiple = TRUE,
layout = c(6,3), as.table = TRUE ,
2005 Sep 22
2
Survey of ROC AUC / wilcoxon test functions
Hi,
I was lately debugging parts of my 'colAUC' function in caTools package, and
in a process looked into other packages for calculating Areas Under ROC
Curves (AUC). To my surprise I found at least 6 other functions:
* wilcox.test
* AUC from ROC package,
* performance from ROCR package,
* auROC from limma package,
* ROC from Epi package,
* roc.area from verification
2024 Oct 30
1
Extracting wind direction and wind speed from wind rose plot
A wind rose plot omits time information. Your request is simply not possible.
On October 30, 2024 3:48:03 AM PDT, javad bayat <j.bayat194 at gmail.com> wrote:
>Dear all;
>I am searching for a way to extract wind direction and speed from a wind
>rose plot. I have a graph and I want to make a dataframe of 5 years with
>hourly intervals.
>
>> start_date <-
2024 Oct 30
2
Extracting wind direction and wind speed from wind rose plot
Dear all;
I am searching for a way to extract wind direction and speed from a wind
rose plot. I have a graph and I want to make a dataframe of 5 years with
hourly intervals.
> start_date <- as.POSIXct("2019-01-01 00:00:00")
> end_date <- as.POSIXct("2023-12-31 23:00:00")
> time_sequence <- seq(from = start_date, to = end_date, by = "hour")
> df
2000 Feb 02
1
Placing a varialbe within a text statement.
I have a simple question.
On a plot, I would like to place text containing a calculated value. What is the format?
For example.
I would like the following text to appear on a plot.
The average temperature is 23.1 degrees.
I'm guessing the command is
text( x, y, "The average temperature is " %variable name% "degrees")
Thanks,
Matt Pocernich
-------------- next part
2003 Jan 22
1
Convert numeric value to POSIXct
Hi,
How do I convert a numeric value indicating the time since 1970, back into
a POSIXct class object? I have tried format.POSIXct and as.POSIXct
without success.
For example
> ccc
[1] "1945-01-01 15:00:00 MDT"
> ddd<- as.numeric(ccc);
> ddd
[1] -788842800
> format.POSIXct(ddd)
Error in format.POSIXct(ddd) : wrong class
> as.POSIXct(ddd)
Error in
2010 Nov 12
1
wind rose (oz.windrose) scale
Dear list,
I trying to make a wind rose plot whit the command oz.windrose, from plotrix
package. My data, a matrix of percentages with the rows representing speed
ranges and the columns indicating wind directions was generated
using bin.wind.records command from same package:
[,1] [,2] [,3] [,4] [,5] [,6] [,7]
[1,] 0.4405286 0.0000000 0.1468429 0.4405286 0.4405286
2000 Nov 29
1
Step function
I am having problem using the step function for a linear regression model. I've created an initial model containing only the intercept. Then using the step function, I've selected three variables to be considered for the model.
> x0.lm<- lm(MEDV~1, data = x)
>
> anova(x0.lm)
Analysis of Variance Table
Response: MEDV
Df Sum Sq Mean Sq F value Pr(>F)