search for: statistica

Displaying 20 results from an estimated 108 matches for "statistica".

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2008 Apr 09
2
GLM fitting in R and Statistica
Hi, I have a problem concerning discrepances between R (which I use) and Statistica (which uses my supervisor). I can't say what is the origin of these differences but unfortunately my supervisor doesn't know that either. Our response variable is number (or presence/absence) of parasites in rodents and explanatory variables are presence/absence of several alleles. The...
2004 Feb 26
2
Multidimensional scaling and distance matrices
Dear All, I am in the somewhat unfortunate position of having to reproduce the results previously obtained from (non-metric?) MDS on a "kinship" matrix using Statistica. A kinship matrix measures affinity between groups, and has its maximum values on the diagonal. Apparently, starting with a nxn kinship matrix, all it was needed to do was to feed it to Statistica flagging that the matrix was NOT a distance matrix but a kinship one. If Statistica transformed the...
2004 Feb 01
4
Assistance with data import from Statistica
I am a new R user attempting to convert files from Statistica to R. I can export from Statistica to SPSS .por format, but not to the SPSS .sav format. Is there a procedure for easily accomplishing this, which will allow me to keep variable short and long labels (big surveys LOTS of time to replace all this work). Many thanks for sharing your time and know...
2011 Mar 22
2
Popularity of R, SAS, SPSS, Stata, Statistica, S-PLUS updated
Greetings, I've just put out the latest version of "The Popularity of Data Analysis Software" at http://r4stats.com/popularity. This update includes complete data for 2010, the addition of number of blogs for each software, more coverage of Statistica, and, where possible, measures regarding the implementations of the SAS Language: Carolina and the World Programming System (WPS). Cheers, Bob ========================================================= Bob Muenchen (pronounced Min'-chen), Manager Research Computing Support Voice: (865)...
2009 Dec 07
2
column statistics
...6 B Y 7 B Y 8 I would like to get: Factor1 Factor2 Value A X 1.5 A Y 3.5 B X 5.5 B Y 7.5 Up to now, I worked in Statistica and Systat, and it was called "column statistics" in Statistica (and I had a script with the "BY" function in Systat). Of course it is a simplified case. For my dataset I have 4 factors and 15 variables, so a general method would be nice. However, my skills are not that gre...
2010 Jan 30
2
Questions on Mahalanobis Distance
Hello, I am a new R user and trying to learn how to implement the mahalanobis function to measure the distance between to 2 population centroids. I have used STATISTICA to calculate these differences, but was hoping to learn to do the analysis in R. I have implemented the code as below, but my results are very different from that of STATISTICA, and I believe I may not have interpreted the help correctly and may have implemented the code incorrectly. Though I am...
2013 Feb 01
1
ks.test and wilcoxon.test results differ from other stat.packages
Probably, it's an obvious info, but I have not found anything in R FAQ concerning this feature/bug. The results of ks.test and wilcoxon.test (in the Mann-Whitney version, paired = 'FALSE') don't coincide with the results from the other statistical packages, e.g. Statistica, Medcalc, and (as for MW test) from the numerous online MW tests. E.g. Statistica p-value=0.0435353 Medcalc p-value=0.0435354 R p-value=0.04635 If I want to obtain result of test once, it does not matter. But what should I do if I want to perform Monte-Carlo simulation...
2012 May 29
2
Wilcoxon-Mann-Whitney U value: outcomes from different stat packages
...sts. The two most common definitions correspond to the sum of the ranks of the first sample with the minimum value subtracted or not. R subtracts [?.], giving a value which is larger by m(m+1)/2 for a first sample of size m? - as result of the same test performed with different stat packages (i.e. STATISTICA and PAST) I?ve got an U value of 200.5 as in W2 (see my script) with the same p-value What can I conclude regarding STATISTICA and PAST packages?... are they giving W2 (see my script) instead of U? A crucial point is that the variant of the algorithm used for computation by the packages is very r...
2013 Oct 09
1
mixed model MANOVA? does it even exist?
...ot;cheating" to simply estimate the effect of the predictors on DV2 because those effects could be indirect (via DV1), right ? I see two solutions : *One solution would be a mixed model MANOVA (if that even exists)*. But i don't know how to run a mixed model MANOVA, i tried to do it with Statistica but couldn't find the right module (I know how to declare two DVs and run a GLM, but *I don't know if the covariance between my two DVs is automatically controlled for*). Same thing with R. I tried to ask a question on Statistica's forum with no answer, tried looking around in the manua...
2005 May 16
2
a problem sourcing a file using chdir=TRUE
...then non changing of current directory is done. Is this the desired behavior or some bug fix is required? Luca +-----------------------------------------------------------------------+ | Dr. Luca Scrucca | | Dipartimento di Economia, Finanza e Statistica | | Sezione di Statistica tel. +39-075-5855226 | | Universit?? degli Studi di Perugia fax. +39-075-5855950 | | Via Pascoli - C.P. 1315 Succ. 1 | | 06100 PERUGIA (ITALY)...
2011 Aug 17
2
Getting vastly different results when running GLMs
...of a total number of times a specific behaviour was observed (regardless of location [sun/shade]). These are represented by the columns 'specific' and 'total' respectively. I had originally coded these values as a proportion variable, but had similar mismatch problems between R and Statistica (as described below). The GLM I am running is a binomial one (as my count response variables are divided dichotomously by the sun/shade predictor variable) with a logit link function. My problem is this: I originally ran the data through another stats program (Statistica) and got significant effect...
2009 Aug 31
3
Two way joining vs heatmap
Hi STATISTICA has a function called "Two-way joining" (see http://www.statsoft.com/TEXTBOOK/stcluan.html#twotwo) and the reference material states that this is based on the method as published by Hartigan (found this paper: http://www.jstor.org/pss/2284710 through wikipedia). What is the relationship...
2012 Dec 18
3
Regression line does not show on scatterplot
...scatterplot and now would like to add its regression line but it does not show. Below, the code I have used. lm3 <- lm(data$S_pH_KCl2.5_BCx~data$B_OleicoPF_BCx_per) plot(data$S_pH_KCl2.5_BCx, data$B_OleicoPF_BCx_per) abline(lm3) I have been able to do the complete operation using the software STATISTICA but it would be great to do it with R. If you require more details please get in touch. Thanks a lot! Bea [[alternative HTML version deleted]]
2007 Jan 08
2
Simple spectral analysis
Hello world, I am actually trying to transfer a lecture from Statistica to R and I ran into problems with spectral analysis, I think I just don't get it 8-( (The posting from "FFT, frequs, magnitudes, phases" from 2005 did not enlighten me) As a starter for the students I have a 10year data set of air temperature with daily values and I try to get a pe...
2003 May 09
1
correspondence analysis
Hi everybody, I am starting my friendship with R. Now I want to do a Correspondence Analysis using the vegan library or multiv library. Both give me the same results which differ from the ones I get running other programs like Statistica... I wounder if there is a problem with my matrix. I have cualitataive variable in the columns and sampling units in the rows... I import my matrix into R with matrix(scan....), which dose not accept strings, so I have eliminated all the names of my rows and columns and just worked with the acc...
2005 Mar 01
4
write a library under 2.0.1 version
Hi there, I had written a library under R 1.9.0 and now I would like to import that library under R 2.0.1 Apparently it does not work; I can install the package, but when I try to read it the error is the following: Error in library(compvar) : 'compvar' is not a valid package -- installed < 2.0.0 I have checked other libraries in R 2.0.1 and I noticed that there is a new folders
2000 Aug 12
1
Nonlinear regression question
Dear R users I recently migrated from Statistica/SigmaPlot (Windows) to R (Linux), so please excuse if this may sound 'basic'. When running a nonlinear regression (V = Vmax * conc / (Ks + conc), i.e. Michaelis-Menten) on SigmaPlot, I get the output listed below: >>>Begin SigmaPlot Output<<< R = 0.94860969 Rsqr = 0.8998...
2007 Jun 12
5
R Book Advice Needed
I am new to using R and would appreciate some advice on which books to start with to get up to speed on using R. My Background: 1-C# programmer. 2-Programmed directly using IMSL (Now Visual Numerics). 3- Used in past SPSS and Statistica. I put together a list but would like to pick the "best of" and avoid redundancy. Any suggestions on these books would be helpful (i.e. too much overlap, porly written etc?) Books: 1-Analysis of Integrated and Co-integrated Time Series with R (Use R) - Bernhard Pfaff 2-An Introduction...
2004 Apr 02
3
Single Factor Anova
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello all - As I progress in R I am trying to automate functions I would have normally farmed out to Excel, SPSS or Statistica. Single factor anova is one of them. For example, a dataset from NIST StRD (http://www.itl.nist.gov/div898/strd/anova/AtmWtAg.html) has two groups: 1 2 107.8681568 107.8681079 107.8681465 107.8681344 107.8681572 107.8681513 107.8681785 107.8681197 107.8681446 107.8681604...
2005 Feb 10
5
Annual cumulative sums from time series
Hello world, I am actually transferring a course in data management for students in biology, geography and agriculture from statistica to R - it works surprisingly well. If anyone is interested in my scratch/notepad (in German language), please see www.hydrology.uni-kiel.de/~schorsch/statistik/statistik_datenauswertung.pdf (pages 40-52) The dataset is: www.hydrology.uni-kiel.de/~schorsch/statistik/erle_stat.csv It contains a...