How to define the parameters of Spatio-Temporal variogram models?

More Hamideh Kazemi's questions See All

In meta-analysis of binary outcomes, what should we do when the occurrence of outcome is zero in both groups?

In conducting meta-analysis of binary outcomes (in RCTs), in case the risk ratio has not been reported, what should we do with the studies that the number of outcomes occurrence is zero in both...

09 January 2021 2,802 5 View

How to calculate ratio of means and ratio of geometric means?

In conducting a meta-analysis, sometimes, some studies have reported geometric mean, while others have reported arithmetic mean. One solution for pooling these studies is calculating the ratio of...

11 December 2020 4,663 3 View

Is (Are) there any valid corpus containing geographical events queries?

Hi all, I'm currently looking for a question corpus to have a plausible number of spatial events queries. I found MS MARCO dataset in which I could extract a reasonable number of geographical...

08 December 2020 7,844 2 View

Do I have to assume sphericity or not when conducting two way repeated measures ANOVA in graphpad prism 8?

I am analyzing data obtained from a crossover study conducted on same animals evaluating the effect of two different anesthetic drugs on heart rate, respiratory rate, pulse oximetry, rectal...

28 September 2020 6,408 4 View

About designing of packed column?

i want to design a packed column via aspen plus. is there any law to determine the L/V in any stage? for example for any stage, is necessary the L/V ratio be more than 70-80%?

27 August 2020 8,127 3 View

How to interpret arima model with regressors in r?

Hi there; I need to produce such an equation for a time series using arima model: y(t) = y(t-1) + a*x(t) + b*x(t-1) I know if I use for example arima (1,0,0) with x as the exogenous...

07 August 2020 7,438 6 View

Why some use seasonal ARIMA(p,d,q) (P,D, Q) instead of SARIMA?

Hello everyone. I am trying to use ARIMA model for a time series with seasonality. As I am new to this topic, I use the internet as my guide. My question is why anyone should use Seasonal ARIMA...

05 August 2020 219 4 View

Where is appropriate to publish a paper on Covid-19?

Dear colleagues We are writing a manuscript of our research on electrolyte imbalance in patients with covid-19. What is your suggestion to submit this manuscript? Tanks for your time Dr Moosapour

10 May 2020 6,772 3 View

How can I add stations to HBV-Light model?

Hi everyone. I've been using the original HBV model, so far. I might need to change it to HBV-light. Does anybody know how to add stations to HBV-light software? I can see there is this...

01 April 2020 1,032 7 View

How to change tunit in VariogramST (R)?

Hi there, I am trying to use VariogramST function in R, for spatial-temporal kriging. The values I am working on, are monthly based; while in the function VariogramST, the predefined "tunit" is...

27 January 2020 5,986 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 View

What is involved in morphological changes of SEM images of a substance?

In the sem analysis of CaCO3 nanaoparticles, the morphology images showed spherical shaped particles but the proposed morphology for these type of nanoparticles is trigonal. I prepared the...

01 March 2021 1,960 4 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

How to define tie constraint between rigid body and another part in dynamic explicit model of Abaqus?

Hi dear researchers I connected a rigid body into the part of my structure by tie constraint and then I added displacement to rigid body, in static general step every thing is fine and these two...

28 February 2021 3,442 2 View

Does the circuit modeling for planar monopole antennas using Foster canonical forms give good approximation?

Hi researchers, I am searching for some accurate way to do the circuit modeling of planar CPW-fed monopole antennas. I have gone through the literature where mostly circuit modeling is done using...

28 February 2021 7,016 1 View

How to modify Johnson cook equation in ABAQUS?

I wanted to add an extra parameter to the existing Johnson cook equation in the ABAQUS simulation. How to add those extra parameters. Ref: A modified Johnson-Cook material model with strain...

28 February 2021 4,841 3 View

Mohamed-Mourad Lafifi

Dear Hamideh,

I suggest you to see links and attached files on topic.

https://rdrr.io/cran/gstat/man/vgmST.html

http://r-spatial.github.io/gstat/reference/extractPar.html

https://journal.r-project.org/archive/2016/RJ-2016-014/index.html

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6971083

https://cran.csiro.au/web/packages/gstat/gstat.pdf

Best regards

Muhammad Ali

I would like to suggest you :

Article Classes of Nonseparable, Spatio-Temporal Stationary Covarian...

https://cran.r-project.org/web/packages/gstat/vignettes/spatio-temporal-kriging.pdf

Hamideh Kazemi

Mohamed-Mourad Lafifi Muhammad Ali

Thank you guys for the replies.

But my question was how to calculate the values of nugget, sill and range for the time component and the spatial component of the VariogramST.

Unfortunately, I couldn't find my answer in those papers.

Hi,

Here is a complement of references.

https://www.r-bloggers.com/spatio-temporal-kriging-in-r/

Article stUPscales: An R-Package for Spatio-Temporal Uncertainty Pro...

Yu Wang

I also want to ask the question.

r in variogramST(values ~ 1, wind.data, tunit = "days", assumeRegular = F, : object 'ret' not found.