search for: electrodes

Hi, I need to subset different levels of vector in a dataset to create a new dataframe that contains only these. These observations are not numerical, so I can't use the subset() function (at least this is the response I get from R). Suppose the dataframe looks like this:   ParticipID    ERP   Electrode 1         s1  0.0370       FP1 2         s2 35.0654       FP2 3         s3

...vels (electrode1, ...,electrode8). I want to split the table always at the row where ?electrode1? starts again so that I can export 7 individual dataframes (numbered ?dataframe1? to ?dataframe7?) which contain always electrode1 as first level (always three rows) with the varying number of rows for electrodes2-8 below. I tried the split function with various setups: t <- as.factor(XXX$electrode) dataframeX <- split(XXX, f=(levels=t)) But this doesn?t work. Could you please help. Thank you! Dennis This is the table "XXX" electrode length electrode1 5.7 electrode1 6.3 electrode1 6.2...

Hola buenas noches, tengo un problema bastante gordo. ¿A alguno le ha dejado de funcionar las funciones pamer.fnc y mcp.fnc con la nueva versión de R? La semana pasada formatee el ordenador y ahora scripts antiguos no funcionan. La cuestión es que me precupa que no funcione el ejemplo de tutorial del autor. Os dejo un script que debería de funcionar y no lo hace

...subjects factors. There are 2 subject groups. Although there are matched individuals across groups (matched for extraneous demographic variables), we consider them a between-subject factor with 2 categorical levels (controls, patients). The dependent variable is a multivariate recording from 124 electrodes on the scalp, to measure electric potential from the scalp surface. These recordings are summarised into regional activity for the left and right hemisphere. So hemisphere is a within-subjects factor that has 2 levels (left and right). The last factor is an experimental manipulation, a visual t...

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