search for: magnesium

Displaying 16 results from an estimated 16 matches for "magnesium".

2005 Mar 17
2
Repeated Measures, groupedData and lme
...ing to fit a REML to some soil mineral data which has been collected over the time period 1999 - 2004. I want to know if the 19 different treatments imposed, differ in terms of their soil mineral content. A tree model of the data has shown differences between the treatments can be attributed to the Magnesium, Potassium and organic matter content of the soil, with Magnesium being the primary separating variable. I am looking at soil mineral data were collected : 99, 02, 04. In the experiment, there are 19 different treatments (treatmentcontrol, treatment6TFYM, treatment 12TFYM etc), which are replic...
2012 Sep 28
1
Lattice bwplot(): Conditioning on one factor
I'm not able to create the proper syntax to specify a lattice bwplot() for only one of two conditioning factors. The syntax that produces a box plot of each of the two conditioning factors is: bwplot(quant ~ param | era, data=mg.d, main='Dissolved Magnesium', ylab='Concentration (mg/L)') What I've tried unsuccessfully are: bwplot(quant ~ param | factor(era=='Pre-mining'), data=mg.d, main='Magnesium', ylab='Concentration (mg/L)) bwplot(quant ~ param | era, data=mg.d, main='Magnesium', ylab='Concentr...
2008 May 27
1
Fwd: Re: Seeking help with trellis: log scales on xyplot
...payan Sarkar wrote: On 5/23/08, hobie perry wrote: > > Good afternoon. > > The basic plot function can automatically generate log scales as follows: > > plot(calcium ~ soil_ph, log="y") > > Here is my basic model in xyplot... > > xyplot(calcium+magnesium ~ soil_ph|depth*region) > > I would like the calcium and magnesium values to be reported on a log scale. > I have tried manipulating "scales" and "yscale.components" to no effect. Try something like xyplot(calcium+magnesium ~ soil_ph|depth*region, scales = li...
2012 Oct 19
1
Optimization in R similar to MS Excel Solver
Dear Colleagues, I am attempting to develop an optimization routine for a river suspended sediment mixing model. I have Calcium and Magnesium concentrations (%) for sediments from 4 potential source areas (Topsoil, Channel Banks, Roads, Drains) and I want to work out, based on the suspended sediment calcium and magnesium concentrations, what are the optimal contributions from each source area to river suspended sediments. The dataset is...
2003 Sep 11
2
DNS related ports from ports/net/ to ports/dns
At 12:44 AM 9/12/2003 -0400, Adam Weinberger wrote: >New categories are added slowly to the cvsup category lists. It's best >to cvsup using ports-all, and add the directories you don't want (such >as languages: "ports/french*" etc.) to the refuse file. How is having a refuse file slowing down CVSup down best? The fact is a category does not appear often and for those
2011 Aug 30
3
Descriptive Stats from Data Frame
...t. The data frame looks like this: > summary(chemdata) site_id.sample_date.param.quant BC-0.5|1996-04-19|Arsenic|0.01 : 1 BC-0.5|1996-04-19|Calcium|76.56 : 1 BC-0.5|1996-04-19|Chloride|12 : 1 BC-0.5|1996-04-19|Magnesium|43.23 : 1 BC-0.5|1996-04-19|Sulfate|175 : 1 BC-0.5|1996-04-19|Total Dissolved Solids|460: 1 (Other) :14880 I want first to calculate (and plot) descriptive stats by chemical, ignoring site and date and telling R to ignor...
2008 Jun 19
1
PrettyR (describe)
....23, 0.15, 0.09, 0.071, 0.073, 0.16, 0.074, 0.24, 0.14), Lead = c(0.00024, 8.2e-05, NA, 0.00031, NA, 3.2e-05, 1.9e-05, 0.00025, 6.5e-05, 4.3e-05, 2e-04, 0.00026, 7.8e-05, 0.00013, 0.00015, 0.0072, 2e-04, 5.7e-05, 0.00013, 0.00012, 9.9e-05, NA, 5.6e-05, NA, NA, 0.00014, 5.3e-05), Magnesium = c(1.3, 1.2, 1.3, 1.5, 1.3, 1.1, 1.4, 1.2, 1.4, 1.4, 1.4, 1.5, 1.3, 1.5, 1.3, 2.1, 1.4, 1.4, 1.5, 1.4, 1.5, 1.4, 1.3, 1.4, 1.3, 1.5, 1.4), Manganese = c(0.028, 0.11, 0.034, 0.043, 0.088, 0.09, 0.068, 0.091, 0.081, 0.079, 0.24, 0.24, 0.1, 0.076, 0.055, 1.8, 0.096, 0.044, 0.18, 0.076...
2011 Dec 06
1
help wrapping findInterval into a function
...(WQdata$value, c(-Inf, 0.027, 0.1, 100, Inf))]),"")) WQdata$SodiumFlag <- with(WQdata, ifelse(analysis == "Sodium", (flags <- c("Y", 'Q', "", "A") [findInterval(WQdata$value, c(-Inf, 0.050, 0.125, 125, Inf))]),"")) WQdata$MagnesiumFlag <- with(WQdata, ifelse(analysis == "Magnesium", (flags <- c("Y", 'Q', "", "A") [findInterval(WQdata$value, c(-Inf, 0.065, 0.15, 75, Inf))]),"")) .....etc for additional water-quality analyses... } As an aside, I started workin...
2017 Nov 03
2
HP laptops with CentOS 7?
...rgon for over 30 years - leads to developing microcracks in it: copper > when going through plastic deformation hardens, then cracks. Funny you should mention the "propeller test", as this is why I've stayed away from Dell laptops, and instead went for the HP Compaq's with the magnesium chassis in the early 00's! I've stayed with HP since then. HP has however had a habit of replacing the hardware anytime within a series while calling the models the same. This has bitten both me and the people at central IT sourcing the Microsoft SCCM infrastructure for us. I think I'...
2001 Jun 23
2
Compiling on FreeBSD bombs at dlls/ntdlls/signal_i386.c
It has been a couple months since I tried compiling from source. I just CVSuped a fresh set of files before building. Here is the error message. ./signal_i386.c: In function `set_vm86_pend': ./signal_i386.c:793: `VIP_MASK' undeclared (first use in this function) ./signal_i386.c:793: (Each undeclared identifier is reported only once ./signal_i386.c:793: for each function it appears
2013 Jan 30
0
non-metric multidimensional scaling
...I used each of the replicates in a treatment. There were 4 treatments. 2 were controls and the other two were a simulated 30 day drought and a simulated 60 day drought. >From each of the replicates in each of the treatments I measured pH and nitrate, sulphate, dissolved organic carbon, calcium, magnesium, nickel, cobalt, aluminum, and copper concentrations. I tried performing an NMDS using the following tutorial http://strata.uga.edu/software/pdf/mdsTutorial.pdf. However, I did not take into account sites or treatments. All the data was used without making those distinctions. I would like to make...
2007 Jan 18
1
Clusterer generating javascript syntax error
Hi all, I''m using Ym4r with the Clusterer. The GMaps code in my controller looks something like this: # geo is an array of lon/lat points session[:gmap] = GMap.new(''map_div'') session[:gmap].control_init(:large_map => true,:map_type => true) session[:gmap].center_zoom_init([38.134557,-95.537109],4) markers = Array.new
2017 Nov 03
0
HP laptops with CentOS 7?
...ears - leads to developing microcracks in it: copper >> when going through plastic deformation hardens, then cracks. > > Funny you should mention the "propeller test", as this is why I've stayed > away from Dell laptops, and instead went for the HP Compaq's with the magnesium chassis in the early 00's! I've stayed with HP since then. Dell is huge, they make everything, and "consumer grade" Dell laptops are "flexible" junk. But for business the ones that you can buy even with 5 year warranty are solid built. <rant> I hate Compaq (bough...
2009 Dec 17
2
some help regarding combining columns from different files
Dear all, Here is my code which am using to combine 5th column from different data sets. Here is the function to do my job genesymbol.append.file <-NULL gene.column <- NULL readGeneSymbol <- function(files,genesymbol.column=5){ for(i in fnames){ temp <- read.table(fnames,header=T,sep="\t",stringsAsFactors=F,quote="\"")
2017 Nov 02
14
HP laptops with CentOS 7?
Hello all, I'm looking into getting HP laptops for our department running CentOS 7. Last time I checked this was some five or so years ago, and when I look at https://wiki.centos.org/HowTos/Laptops, nothing much seems to have happened since. At that time, I had to give up CentOS on laptops, as both Wi-Fi and graphics wasn't too well supported with CentOS 5 and 6. Is the situation better
2006 May 27
36
Might be buying a Mac
I might be buying a Mac tomorrow. I checked out the new 13.3in MacBook at the new Apple Store on 5th ave in NYC. I''m torn between the smaller MacBook and the MacBook Pro. We have a pro at work and I''m not that thrilled with the way it feels. I like the keyboard much better on the 13inch. However, I think doing development on that small of a screen could get frustrating. Any