similar to: problem with mediation

Hello all, I apologize for the simplistic question, but I have been having some trouble learning how to do mediation analysis in R. Ideally, I would like to use Preacher's Bootstrapping test for mediation (Preacher & Hayes, 2004). I have attempted to use the mediate package to set this up, using code that looks basically like this: model.m <- lm(data$outcome ~ data$mediator +

Hi everyone,I would like to test a mediation model, that has several control variables. More specifically, I would like to test the indirect effect with bootstrapping. However, all the packages I have found so far (e.g. MBESS) only allow testing a simple mediation model (One independent, one mediator, one dependent) so that I cannot include any controls. Can somebody help me? [[alternative HTML

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I'm having trouble with the mediate() and medsens() functions from the mediation package. My treatment, mediator and outcomes variables are all continuous and scaled to the 0-1 interval. The data is observational not experimental. I am thus using lm() for the initial outcome and mediation regression models. I also use weights as the data are survey data. (As a footnote, I use the svyglm()

Dear friends, i've a little problem with a study about mediation. I will call my dependent variable "Y", the independent "X" and "Z" will be my mediator variable... Using a linear regression, i can say that there isn't a direct effect of X on Y because the coefficient of X isn't significative, but i've tried to use anyway the Sobel's test to

Hi Everyone, I am getting the following error message Error: cannot allocate vector of size 2.6 Gb In addition: Warning messages: 1: In dim(res$res) = dim(bi) : Reached total allocation of 8122Mb: see help(memory.size) 2: In dim(res$res) = dim(bi) : Reached total allocation of 8122Mb: see help(memory.size) 3: In dim(res$res) = dim(bi) : Reached total allocation of 8122Mb: see

Hello, Any advice or pointers for implementing Sobel's test for mediation in 2-level model setting? For fitting the hierarchical models, I am using "lme4" but could also revert to "nlme" since it is a relatively simple varying intercept model and they yield identical estimates. I apologize for this is an R question with an embedded statistical question. I noticed that a

Hello, Have someone performed a bootstrap in a multiple-mediator model? I am trying to compute a bootstrap in a multiple and multilevel mediation. Up top now, I have developed bootstraps in random coeffient models, but I am very lost concerning the mediation. Could someone to provide me some ideas about syntax in R? Thank you very much in advance, Bea

Hi all, I am going to have solaris 06/06, a database (postgresql), application server (tomcat or sun app. server) on x86, 2GB with max. 3 scsi (hardware raid possible) disks. There will be no e-mail or file serving. The ratio of write/read operations to database is >=2 (and there is no other significant disk io). Block size of postgresql is default (I think it is 8K). Our application

Buenas compañeros! Tengo una duda y no se muy bine como resolverlo. Tengo un csv en el que hay variables separadas por comas y otras esparadas por espacios (tabulaciones). Algo así V1 V2 V3,V4 M1 123 2512,2522 M2 117 2852,3521 ................................... Para leerlo he probado poniendo:

Hi, Is there any difference between decoding of CBR or VBR streams in realtime in terms of CPU usage/cost? Are sample rates other than 44100Hz supported by Vorbis officially ? If it is supported, is it efficient to use them or is Vorbis specifically (or at the moment) optimized for 44100Hz ? Thanks in advance. --- Mete BALCI Senior Game Programmer Momentum DMT Istanbul, TURKEY

No , lo mete como string... Obtener Outlook para Android<https://aka.ms/ghei36> ________________________________ From: Javier Marcuzzi <javier.ruben.marcuzzi en gmail.com> Sent: Friday, March 9, 2018 3:47:46 AM To: Jes?s Para Fern?ndez Cc: Lista R Subject: Re: [R-es] Imputar NA a SQL Server Estimado Jes?s Para Fern?ndez Pruebe lo siguiente: str_replace_all(values,

Hello, In a study exploring transgenerational transmission of anxiety disorder we investigate whether infants react to experimentally induced mood changes of their mothers. We measured the time that an infant needed to cross a cliff (=crossing time) depending on whether his mother had previously undergone a mood induction (treatment) or not (control). The treatment is thus a

Buenas; La pregunta va resultar evidente una vez se entienda, espero saber darme a entender. Quiero identificar qué tengo que aprender para poder hacer un sitio web con R. Este sitio web tiene que poder: * Recibir los datos (archivos .csv mutuamente referenciados) que alguien conectado a la red (vos mismo, usted misma) suba. * Procesarlos * Devolver resultados en base a esos datos introducidos.

Funciona, me crea una matriz en cada iteración, con un nombre que incluye el nº de la iteración. Me surge ahora el problema de que, dentro del mismo bucle la quiero convertir en df y ponerle nombre a las columnas, y como el nombre de la matriz es distinto cada vez, no sé cómo hacerlo. Supongo que se hará todo al crearla, pero no sé cómo. Un problema adicional es que las variables

Hi, Regarding to my previous question, I think I have found out from oggenc source code that the correct way to initialize encoding is: vorbis_encode_init_vbr (or vorbis_encode_setup_managed for cbr etc.) vorbis_encode_ctl (to turn off or use avg bitrate management) vorbis_encode_setup_init By this way, there is no problem with encoded stream. However, there is no documentation of the three

Por complementar lo de Carlos, ahora con docker el tema esta teniendo alternativas lowcost, pero dificiles de configurar si no eres un experto Obtener Outlook para Android<https://aka.ms/ghei36> ________________________________ From: R-help-es <r-help-es-bounces en r-project.org> on behalf of Carlos Ortega <cof en qualityexcellence.es> Sent: Wednesday, April 3, 2019 10:04:46 PM

Hola chicos, muchas gracias, funcionan vuestros códigos, pero no entiendo porqué el mío no funciona, y me gustaría aprender R bien. Quiero sacar números de 5 en 5, desplazándome una posición cada vez para la derecha: a <- c(8,10,4,1,7,2,4,6,3,8) b <- rep(0,5) i=1 while (i<=6) { b <- a[i:i+4] print(b) i=i+1 } quiero que en la primera iteración me saque en

Bien, Carlos, lo de ir metiendo las dfs en una lista parece buena idea, y después puedo fusionarlas con un cbind, tal y como hago ahora mismo, después de crear cada una de ellas independientemente. Son 9 dfs, y obtener cada una de ellas toma bastante tiempo de computación. Lo que quiero es que me haga las 9 en un loop. El problema es que si no les pone nombres distintos a las variables,

Dear r-helpers, I just read in an article by Virtanen et al. (2006) where vegetation-environment relationships are studied by fitting smoothed surfaces on an NMDS ordination using GAMs (Wood 2000). The authors describe, that they used R? as goodness-of-fit statistic, which they compare to the R? of fitted vectors. Calculations were carried out using the package vegan (Oksanen). I know that I can