search for: arsenic

...a data frame with water chemistry data and I want to start exploring these data. There are three factors (site, date, chemical) associated with each measurement. 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)...

Hi all, I am looking for a clever way to create the following graph using R: I got information on the shares of some subgroups over time (summing up to 1 in each year). The graph I want to create should display the development of the individual shares over time by shading rectangulars for each share in a different color. Is there a clever of doing this? Thanks for your help Stefan

Hi All: I was recently working with a dataset on arsenic poisoning. Among the variables in the dataset, I used the following three variables to produce crosstabulations (variable names: FOLSTAT, GENDER, ASBIN; all three were categorical variables, FOLSTAT denoted follow up status for the subjects and had seven levels, GENDER denoted sex (two levels:...

Dear all, After a thorough research, I still find myself unable to find a function that does linear regression of 2 vectors of data using the "total least squares", also called "orthogonal regression" (see : http://en.wikipedia.org/wiki/Total_least_squares) instead of the "ordinary least squares" method. Indeed, the "lm" function has a

Hi, I try to boxplot following data on the subset of (V1,V3,V5,V7) and (V2,V4,V6,V8) V1 V2 V3 V4 V5 V6 V7 V8 2 4 6 7 12 33 43 53 how can I use boxplot function to plot it? thanks, William

...cond third fourth highest significance INAS 0.107 0.115 0.123 0.115 0.166 0.000 MMA 0.091 0.107 0.115 0.142 0.179 0.000 DMA 0.126 0.103 0.126 0.129 0.142 0.031 The numbers in the dataframe indicate values of a continuous variable INMET (indicating ratio of inorganic arsenic vesus methylated arsenic species) for the respective quintiles of variables INAS, MMA, and DMA; "lowest" through "highest" indicate quintile levels of INAS, MMA, and DMA. INAS, MMA, and DMA are discrete ordinal variables (factors, each variable has following levels: lowest, ......

Hi All: I am working with a dataset on Arsenic toxicity, and I am trying to calculate the 20th, 40th, 60th, 80th, and highest percentiles for a variable, dietary Moisture (variable name dMoist). The inbuilt function quantile(dMoist) would print 0, 25th, 50th, 75th, and 100th percentile. Does there exist a function that can calculate xth p...

R Users: My question is probably more about elementary statistics than the mechanics of using R, but I've been dabbling in R (version 2.2.0) and used it recently to test some data . I have a relatively small set of observations (n = 12) of arsenic concentrations in background groundwater and wanted to test my assumption of normality. I used the Shapiro-Wilk test (by calling shapiro.test() in R) and I'm not sure how to interpret the output. Here's the input/output from the R console: >As = c(13, 17, 23, 9.5, 20, 15, 11, 17, 21,...

...t;, "RM185", "RM190", "RM198", "RM202", "RM215", "RM61", "SC"), class = "factor"), Alkalinity = c(13, 13, 17, 17, 21, 21, 19, 14, 16, 15, 14, 14, 14, 15, 15, 9.7, 17, 14, 15, 14, 14, 15, 15, 15, 15, 15, 14), Arsenic = c(NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 0.00039, NA, 0.001, NA, 0.00037, 0.00046, 0.00026, 0.00033, 0.00059, 3e-04, NA, NA, NA, NA), BOD..5.day = c(NA, NA, NA, 3.3, NA, NA, 2.1, NA, NA, NA, NA, NA, NA, NA, NA, 3.4, NA, NA, 2.4, NA, NA, NA, NA, NA, NA, NA, NA), Cadmiu...

...th quantile Matthias Templ -----Urspr??ngliche Nachricht----- Von: arinbasu at softhome.net [mailto:arinbasu at softhome.net] Gesendet: Montag, 26. April 2004 09:29 An: r-help at stat.math.ethz.ch Betreff: [R] Looking for help in calculating percentiles Hi All: I am working with a dataset on Arsenic toxicity, and I am trying to calculate the 20th, 40th, 60th, 80th, and highest percentiles for a variable, dietary Moisture (variable name dMoist). The inbuilt function quantile(dMoist) would print 0, 25th, 50th, 75th, and 100th percentile. Does there exist a function that can calculate xth p...

Recently, we made a switch from 1.9.18 to 2.0.3. Under 1.9.18, we had local master turned off to prevent a browser election war. However, under some network configurations, (where the system was alone on a Workgroup), the system would, quite appropriately, not appear in the network neighborhood. So for 2.0.3 we changed the config file to allow election participation (local master = yes).

Hola: Tengo los datos diarios del número de casos de coronavirus por comunidades autónomas y quiero calcular el número diario de nuevos casos y la tasa diaria de variación del número de casos y no se como hacerlo en R. *fecha* *comunidad* *poblacion* *casos_totales* 04/03/2020 Andalucía 8414240 13 05/03/2020 Andalucía 8414240 12 06/03/2020 Andalucía 8414240 21 04/03/2020 Aragón

...reading from the samba documentation from the installation. anyways, i'm attaching my smb.conf file below which may be of some help for the experts to spot any mistake(s) that i have made. thanks. ------------8<------------ # Global parameters [global] workgroup = ARS netbios name = ARSENIC server string = ARS Samba Server %v on (%L) ; hosts allow = 192.168.0. 127. interfaces = 192.168.0.1/24 min password length = 5 log file = /var/log/samba/log.%m security = user encrypt passwords = yes max log size = 50 socket options = TCP_NODELAY hide dot file...