What is the best method to plot Land Use Regression model predicted concentration in GIS?

I am working on an application of land use regression model for predicting NOx concentration in Brisbane, Australia. In total 31 sits monitoring data has been incorporated. I have the result...

01 February 2016 2,959 4 View

Any suggestion on the application of Spatial Temporal model in R for analyzing air quality data?

I am planning to apply suitable spatial-temporal model in gaseous concentrations (NO, NO2, NOx, and CO) measured at 30 monitoring station in Brisbane, Australia. Among them, 25 stations are short...

02 March 2015 1,277 5 View

How can I deal with negative and zero concentrations of PM2.5, PM10 and gas data?

Dear all, Do you have idea to resolve zero and negative value issue of a large dataset of PM2.5 and PM10? I started to explore a big dataset and found many negative and zero values that need to be...

08 September 2014 300 11 View

Has anyone used the TAPM-CTM model of CSIRO, Australia in air quality research?

I am going to use TAPM-CTM model for my PhD project. I am just looking for someone who used this model outside of...

07 August 2014 6,967 0 View

What R code or R package can I use to plot a PSD image plot?

07 August 2014 3,407 3 View

How to show air pollutants distribution (e.g., density plot with wind dirrection) on a city map collected from google image?

Hi scientific community, I want to show air pollutants distribution pattern on the city map. Eventually, I want to show pollutants (e.g., PM10, PM2.5, NOx, etc.) distribution pattern on the map of...

06 July 2013 3,696 3 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

Bayesian decision trees and bayesian regression trees in Python and/or R?

I am looking for implementation of bayesian decision trees and bayesian regression trees in Python and/or R.. Do you know if the existing libraries support this

23 February 2021 6,689 3 View

Are there packages (R or Python) for simple models (bucket?) to assess soil water content?

Hi everyone. I am researching droguht effects on soil water drought. I am looking for already implemented functions in R or Python to estimate soil water content from precipitation,...

21 February 2021 2,084 1 View

ANCOVA controlling baseline in RCT - how to perform power analysis and sample size estimation?

Hi, I have a simple question. I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as...

19 February 2021 2,648 23 View

MVN, how to conciliate contradictory results from Multivariate normality and Multivariate outliers test?

Dear colleagues, I'm working with Path analyses in lavaan and MVN packages. There are some results that for me are confusing and features from the MVN that I do not know how to set. My dataset is...

18 February 2021 190 3 View

Would you please recommend a function in R software that could be used with FUNGuild output to merge different rows that have similar guilds?

Dear colleagues, I have an output of FUNGuild tool (ASVs abundance in different samples and assigned to guilds) and would like to merge the ASVs that had similar ecological guilds using R...

16 February 2021 4,292 7 View

How to remove the species data from rda data frame in R (only remain the sites/samples point)?

Dear everyone, When I using the rda function in r, I met this question. As you can see in the figure, there are a lot of deep blue points which refers to the species. But I would like remain...

15 February 2021 8,982 2 View

How to find out or construct(?) the right priors from data of previous experiment to use in a bayesian glm?

I have the following equation, Eating choice (Yes/No)~ Box type (A/B/C). So the question is whether a certain box type affects eating choice in groups of dogs. The eating choice of each member in...

10 February 2021 6,024 9 View

XRPD Quantification - Building a calibration curve of drug excipient?

I am aiming to utilise XRPD to quantify a drug excipient within a drug product and have been having a little trouble building the calibration curve to allow for this quantification up until this...

10 February 2021 6,145 3 View