Displaying 20 results from an estimated 7000 matches similar to: "selecting subsets of data from matrix"
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
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,
2003 Oct 20
2
"aliases" for R constructs?
Hi Folks,
My recent response to Laura Quinn's query about matrix subsetting
reminded of a question.
I wrote:
iDir <- ((Winds[,20]<45)|(Winds[,20]>315))&(!is.na(Winds[,20]))
Now, I find "!is.na" a bit awkward to type, so I might prefer to
type it as "nis.na".
While it is possible to define
nis.na <- function(x){ !is.na(x) }
this involves a slight
2003 Oct 28
2
Visualising Moving Vectors
I am wanting to plot a series of wind vectors onto a contoured area map
for a series of weather stations (eg arrows showing wind speed/direction
for a particular time snapshot), can someone please advise me how best to
approach this?
My desired end point is to be able to link a time series of such data
together so that I will in effect have a "movie" displaying the evolution
of these
2012 Nov 07
8
Aggregate data frame across columns
Folks,
I have a data frame with columns 200401, 200402, ..., 201207, 201208.
These represent years/months. What would be the best way to sum these columns by year? What about by quarter?
Thanks for your time,
KW
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2005 Feb 16
4
festival text for weather report
http://www.srh.noaa.gov/fwd/productviewnation.php?pil=OKXZFPOKX&version=
0
can anyone suggest how I could set up asterisk@home to read out allowed
the following text when I dial extension 850?
815 PM EST WED FEB 16 2005
.OVERNIGHT...MOSTLY CLEAR. LOWS 30 TO 35. NORTHWEST WINDS 15 TO 20
MPH WITH GUSTS UP TO 30 MPH...DIMINISHING TO 10 TO 15 MPH LATE.
.THURSDAY...PARTLY CLOUDY. COOLER
2007 Apr 27
5
weight
Hi,
I have the file below called happyguys. It is a subset of data. How do I
apply the weight variable (WTPP) to this file? Can i just multiply each
column (except the first column because it is a record id) by WTPP? If the
answer is yes, how do I multiply one variable name by another?
Thanks,
Nat
PROV REGION GRADE Y_Q10A WTPP
83 48 4 7 2 342233324020
115
2003 Dec 14
3
Problem with data conversion
Hi All:
I came across the following problem while working with a dataset, and
wondered if there could be a solution I sought here.
My dataset consists of information on 402 individuals with the followng five
variables (age,sex, status = a binary variable with levels "case" or
"control", mma, dma).
During data check, I found that in the raw data, the data entry
2011 Dec 12
3
windrose color ramp issue
Greetings!
I'm having an issue with the windrose produced by the windrose
function from the circular package. For our weather stations in North
Carolina I'm helping with a script which takes hourly wind speed and
direction data to create windroses for our end users. One of the
stations in the mountains frequently reaches wind speed of 40 to 60
mph and in storms can reach wind speed over
2009 Aug 20
3
Wind-data analysis with R?
Hello,
are there people outside who use R for analysis of wind-measurement data
(meteorological or for planning of wind power stations)?
Are there already scripts/modules available for analysing and
displaying/plotting wind data in the way it is done in projection/planning
of wind power stations?
If not, would it be of interest to use R for this, and therefore
adapt data-logger output to R (by
2005 Mar 17
6
About the weather..
Ok, I've been away from the list for sometime now and feel as though I'm
going to ask something that's been asked many times before, yet I find
nothing in the wiki, so here goes:
I notice that allison has done recordings for weather forecasts, yet I
find no agi's that parse forecasts and use this recordings to piece
together the forecast. I find plenty of weather agi's, but
2012 Dec 28
3
Merging data tables
Hi all,
I am trying to merge several data sets and end up with a long data
format by date & time so I can run correlations and plots. I am using
Deducer as an R GUI but can just use the R console if easier.
The data sets are weather with wind speed, relative humidity and
temperatures by date and minute and bat activity with date, time, label,
and an activity index number. The bat
2009 Feb 26
5
Download daily weather data
I'm writing a program that will tell me whether I should wear a coat,
so I'd like to be able to download daily weather forecasts and daily
reports of recent past weather conditions.
The NOAA has very promising tabular forecasts
(http://forecast.weather.gov/MapClick.php?CityName=Ithaca&state=NY&site=BGM&textField1=42.4422&textField2=-76.5002&e=0&FcstType=digital),
2003 Nov 03
1
Visualising Vectors
I sent a mail last week asking for some advise in relation to displaying
wind vectors on a contour map of a region. Whilst I have had some useful
feedback relating to the second part of this question (namely how to
animate a time series of still frames), I haven't recieved any advise on
how I might create the still images of the spatially distributed wind
vector data at any given time point.
2012 Mar 07
4
Subset problem
Good Morning
??? I have a small question regarding the function subset.
I am copying data from one table but I just want to collect data from a
user.
When do I take the view, presents the results I want.
The problem arises when can I make the tab. for RES_ID, introduces me to
zero results do not envision noVIEW
val_user='16'
x.sub <-
2005 Jul 13
2
Monitoring
Is there any software that can be run in windows to monitor icecast mounts, ie, user count etc..
I swear I seen one before but I can't remember where.
-=-=-=-=-=-=-=Ottawa Valley Weather-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Weather @ 2:20pm - Temp: 34.9?C - Humidity 29% - Wind: E @ 13 km/h
Baro: 996kPa Steady - Vis: 8km - Sky: --- - Weather: Haze
Hourly Rain: 0.00mm - Daily Rain:
2004 Feb 02
3
ordering and plotting question
Hi,
I am trying to plot several rows out of a list of thousands. I have 40
columns, and about 16,000 rows with the following Df structure.
ID X01 X02 X03..X40
AI456 45 64 23...
AI943 14 3 45 ..
AI278 78 12 68..
BW768 -2 -7 34..
...
My question is, I have a list of 100 IDs generated elsewhere
(Df-"Ofinterest"), I would like to plot the 100 IDs from that data
frame over the 40 columns
2004 Jan 11
24
More words for Allison
Here's the latest batch of words to get shipped out to Allison Smith.
Please submit reasonably small changes to me by tomorrow 10:00 AM
Eastern time, and I'll add them.
As usual, donations to what will be a ~$110 USD expense would be
appreciated, as I am paying for this round out of my pocket. Please
send to paypal address "jtodd@loligo.com". I did not include all
2017 Jan 14
4
Weak symbol/alias semantics
Thanks, David and Peter. Some responses to Peter's email below. Teresa
On Fri, Jan 13, 2017 at 3:21 PM, Peter Collingbourne <peter at pcc.me.uk>
wrote:
> Hi Teresa,
>
> I think that to answer your question correctly it is helpful to consider
> what is going on at the object file level. For your test1.c we conceptually
> have a .text section containing the body of f, and
2017 Jan 13
6
Weak symbol/alias semantics
Hi Mehdi, Peter and David (and anyone else who sees this),
I've been playing with some examples to handle the weak symbol cases we
discussed in IRC earlier this week in the context of D28523. I was going to
implement the support for turning aliases into copies in order to enable
performing thinLTOResolveWeakForLinkerGUID on both aliases and aliasees, as
a first step to being able to drop