Displaying 20 results from an estimated 10000 matches similar to: "How to pass javascript variables to a method"
2006 Jun 18
3
ActiveRecord Help - Not finding Data
Hello,
I''m farily new to RoR and am having a problem trying to retrieve data
from my database. Here is the code from my controller:
def index
zip = params["zip"]
@zip1 = Zipcode.find(:first, :conditions => ["zip = ?", zip])
lat = @zip1.latitude.to_f
long = @zip1.longitude.to_f
radius = 50
@bookstores = Bookstore.find_by_sql ["SELECT * FROM
2008 Nov 24
0
spatial subset of ncdf
dear
I was lokking for a solution or an example on the internet for quite a time
but since haven?t found an answer yet, I'd like to ask a maybe to simple
question:
I have a large ncdf-file with five dimension.
temperature (t2m), the variable against, lat, lon and time. (height is
included as well)
the structure is
[1] "file C:/RDaten/t2m.ETH.HC_A2.nc has 5 dimensions:"
[1]
2006 Jul 19
5
Model Validation - with a twist
I''m stuck in a catch-22 type problem. I have an insert form for a table
that uses the validation in the model. i.e. When you click submit on the
form and haven''t filled in the required fields then you get the nice
rails error messages saying "field can not be blank". This works fine
until I introduce some more logic.
What I''m trying to do is to validate
2018 May 19
0
How to average values from grid cells with coordinates
Hi lily,
You could also create "blackcells" as a dataframe (which is itself a
type of list). I used a list as I thought it would be a more general
solution if there were different numbers of values for different grid
cells. The use of 1 for the comparison was due to the grid increments
being 1. If you had larger or smaller grid increments, you would use
the grid increment size for the
2018 May 16
0
How to average values from grid cells with coordinates
Hi lily,
There are one or two assumptions to be made here. First is that the
latitude and longitude values of the "black" cells are equally spaced
as in your illustration. Second, that all latitude and longitude
values for the "red" cells fall at the corners of four "black" cells.
You can get the four "black" cells by finding the lat/lon values that
are
2011 Jun 17
0
Inconsistent results from var.get.nc in RNetCDF
Hello -
I am having trouble extracting data from NetCDF data files using
RNetCDF. The data files each have 3 dimensions (longitude, latitude,
and a date) and 3 variables (latitude, longitude, and a climate
variable).
Here is some of the output from print.nc for clarity:
-----
dimensions:
month = UNLIMITED ; // (1368 currently)
lat = 3105 ;
lon = 7025 ;
variables:
float
2006 Apr 04
1
imaging and contouring
Dear R'Helpers and Colleagues,
I have looked in the documentation, asked to some colleagues in the
lab, but was unable to solve the following difficulty.
I am running R on a iMac G5 with OS 10.4.
The file below (73 rows x 144 col) shows the values of a climatic
index on the globe with a grid of 2,5 ? x 2,5 ? (NA = no value):
?
With image() and map() and running the following
2020 Oct 22
0
3d plot of earth with cut
On 21/10/2020 8:45 a.m., Balint Radics wrote:
> Hello,
>
> Could someone suggest a package/way to make a 3D raster plot of the Earth
> (with continent boundaries), and then make a "cut" or "slice" of it such
> that one can also visualize some scalar quantity as a function of the
> Radius/Depth across that given slice ?
>
> Formally, I would have a
2004 Aug 22
1
latitude longitude data
Dear R-helpers,
I get GPS readings with bug counts (bugs meaning
insects in this case) made along rows in crop fields
and use these to make maps of bug distribution. The
GPS readings are not quite accurate enough for my
purpose, so since I know what row each reading is made
in, I adjust the latitudinal coordinate using:
grd<-lm(lat~lon+Row,data)
2011 May 06
1
read a netcdf file _Fill_value=-32768
Hello
I am a new user of R .
and I ve problem with R and netcdf .
I succed installation , I could use all examples .
But when I take my netcf it is different .
I want to do statistic on this kind of file .
1)
first calculate mean .
my data is like that
through ncdump -h test.nc
netcdf test {
dimensions:
lat = 301 ;
lon = 401 ;
time = UNLIMITED ; // (80 currently)
2009 Jan 12
3
Working with duplicated rows
Dear all,
I have a dataframe of 3 columns, consisting of 'longitude', 'latitude'
and a corresponding 'value'. Where identical 'longitude' and 'latitude'
pairs occur more than once, I want their corresponding 'value' to be
summed and the 'pair' to only appear once.
For example:
long lat value
10 20 5
6 2 3
2009 Aug 25
2
latitude and longitude distribution
Good day to you all,
I have lightning data containing date, time, latitude and longitude. I hope
that distribution of latitude and longitude will give number of lightning
occurrence in a region. I have used factor function to sum up the number of
events on latitude and longitude axis and saved as x and y. But when I tried
to plot the two, I had and error message ( Error in image.default(x, y, z) :
2006 Feb 09
1
converting lat-long coordinates to Albers Conical Equal Area coordinates
####################################################################################
We have used maptools to construct state, county, township, census-tract,
and zipcode
level R maps with an Albers Conical Equal Area projection. We would like
to be able to
plot the location of weather stations or other point locations on the
maps. The data
the point locations are in latitude-longitude units
2017 Aug 28
0
Extracting subset from netCDF file using lat/lon and converting into .csv in R
Two questions:
1. Is the order of the dimensions shown what is shown if you look at str(ncin) - I mean shown at the end where it describes the variable and its dimensions?
2. Is you problem how to subset the netcdf file, how to write to the .csv file, or both?
-Roy
> On Aug 28, 2017, at 2:21 PM, Eeusha Nafi <eshad002 at gmail.com> wrote:
>
> I have a series of nertCDF files
2009 May 01
0
Copying ncdf dims and vars from one file to the other
Hi, all
I have a large number of NetCDF files that I need to average and then
put the mean in a new NetCDF file.
My problem is that I do this every time for files with different
variables, so I do not want to hard-code the variables in the new NetCDF
file I creat.
does anyone know how I can copy ALL the dimensions and variables from
one NetCDF file to another, and just put the mean I calculated as
2006 May 08
0
ZipCode Search
I''ve looked through the messages regarding implementing a ZipCode search
and I have a few questions to make sure I have my head wrapped around
this.
Here''s what I have. I have a database table called zipcodes with the
following info (for example)
30310 Atlanta GA 33.727807 -84.41983 -5 1
That''s zip, city, state, latitude, longitude, timezone, and dst.
So when a
2016 Apr 27
1
Determine if a set of x and y-latitude points are inside of a polygon using R
Objective: Determine if a set of x and y-latitude points are inside of
a polygon using R.
Lets say I have 9 polygons. Where I have labeled the polygons to be
checked from 1-9. The problem I?m running into is running the
point.in.polygon to check if those points are in one of several
polygons, as my code overwrites the result.
To accomplish this I am using the R-built in function called
2011 Sep 07
3
Editing the variables attributes section in the netCDF header of netCDF files created using the package ncdf.
Hi,
I am using the package ncdf to create netCDF files and I want to mimic the the header of an exiting netCDF file created outside of R. Below is what the existing header looks like (part of it that is different):
netcdf ccd1984_05_08 {
dimensions:
lat = 1974 ;
lon = 1894 ;
time = UNLIMITED ; // (1 currently)
variables:
int time(time) ;
2009 Nov 17
1
How to plot an image in R
Dear all
Im new in R
I have a necdf data set that I want to plot :
this is my data set
[1] "file Tmax.DJF.daily.1981_1999.echama2.nc has 4 dimensions:"
[1] "longitude Size: 127"
[1] "latitude Size: 110"
[1] "ht Size: 1"
[1] "t Size: 1680"
[1] "------------------------"
[1] "file Tmax.DJF.daily.1981_1999.echama2.nc has 1
2012 Dec 07
0
apply a function at: dateX, dateX+1, dateX+2, ....
Dear knowing people,
Dennis Murphy helped me a lot with my first loop last week. Thanks again - I
could have made more than 10 "Thank-You cakes" in the time it saved me!
But now I want to complicate the thing. My ideas didn't work. Let's see if
anyone is smarter ;-)
The following packages are needed:
library(adehabitatHR)
library(rgdal)
library(plyr)
# My dataframe looks