Rank: 598 based on 240 downloads (last 30 days) and 6 files submitted
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Simone Fatichi

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Files Posted by Simone View all
Updated   File Tags Downloads
(last 30 days)
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24 Feb 2012 Inverse Distance Weight Inverse distance weighting (IDW) multivariate interpolation. Author: Simone Fatichi interpolation, inverse distance weig..., gis, spatial analysis, earth science, hydrology 52 5
  • 4.66667
4.7 | 3 ratings
19 Oct 2009 ARFIMA simulations Time series simulation with ARFIMA models. Author: Simone Fatichi statistics, econometrics, time series, hydrology, stochastic processes, arfima 53 2
  • 5.0
5.0 | 1 rating
09 Oct 2009 Cox-Stuart test Cox-Stuart non-parametric trend test. Author: Simone Fatichi statistics, coxstuart test, trend test, non parametric test, hydrology 18 0
09 Oct 2009 Spearman’s Rho test Spearman’s Rho non-parametric trend test Author: Simone Fatichi statistics, spearman test, daniel test, trend test, non parametric test, hydrology 17 3
  • 1.0
1.0 | 2 ratings
09 Oct 2009 Mann-Kendall Modified test Mann-Kendall non-parametric trend test modified to account for autocorrelations. Author: Simone Fatichi statistics, mann kendall, mann kendall modified, trend test, non parametric test, hydrology 39 0
  • 2.5
2.5 | 2 ratings
Comments and Ratings by Simone View all
Updated File Comments Rating
16 Mar 2012 Spearman’s Rho test Spearman’s Rho non-parametric trend test Author: Simone Fatichi

I don’t think there is a bug in the code, if you give perfectly ranked data: [1 2 3 4 5], the code is simply not able to calculate the significance of the test, because rho is exactly equal to one. I would rather say that a warning message is missing for the rare case of a perfectly ranked time series.

24 Feb 2012 Inverse Distance Weight Inverse distance weighting (IDW) multivariate interpolation. Author: Simone Fatichi

I meant, I now corrected the bug in the "fixed radius" option.

24 Feb 2012 Inverse Distance Weight Inverse distance weighting (IDW) multivariate interpolation. Author: Simone Fatichi

Thanks Michel, I now correct the option bug in the "fixed radius" option.

Comments and Ratings on Simone's Files View all
Updated File Comment by Comments Rating
01 Oct 2013 Mann-Kendall Test Mann-Kendall non-parametric trend test. Author: Simone Fatichi Santos, Roque

Hello,

Is showing an error that says: "Undefined function 'Mann_Kendall_Modified' for input arguments of type 'double'."

How do I correct?

10 Aug 2013 Inverse Distance Weight Inverse distance weighting (IDW) multivariate interpolation. Author: Simone Fatichi M, Carlo

can we use this function to interpolate a 2D matrix?

18 Jul 2013 ARFIMA simulations Time series simulation with ARFIMA models. Author: Simone Fatichi Rob

Thanks for the code. Maybe I'm not using the code correctly, but shouldn't the simulated series be non-stationary when d>.5. This code always seems to generate a stationary series, even when d approaches or is even greater than 1. I'm confused about what this is producing when d>.5. I guess you could fix this by only using it for d values <=.5 and then integrating (e.g. to properly get d = .75, simulate d=-.25 and then integrate?)

30 Mar 2013 Mann-Kendall Test Mann-Kendall non-parametric trend test. Author: Simone Fatichi Jalilvand, Ehsan

Hi Simone,
First of all thank you. I've made some minor change to your code as follow,to include tied groups in Calculating the variance:
after line 48:
% Determining the variance (tied group included)
h=1;
while ~isempty(V)
g=find(V==V(1));
tp=length(g);
Sum(h)=tp*(tp-1)*(2*tp+5);
V(g)=[];
h=h+1;
end
VarS=((n*(n-1)*(2*n+5))-sum(Sum))/18;

Ehsan

26 Feb 2013 Mann-Kendall Test Mann-Kendall non-parametric trend test. Author: Simone Fatichi Novak, Brian

Vectorizing the inner loop in the double sum for calculating S speeds it up significantly:

for i = 1:n-1
S = S + sum(sign(V(i+1:n) - V(i)));
end

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