the "timpeoint" variable is wrong in many of the cases), but i have date of each visit. There are multiple errors in coding of visits (i.e.total number of rows) differ between measure. Missing visits are not represented by a row in any of the dataset.However, there are multiple challenges when combining these data sets into one data set: I am to compile all these data sets into one SPSS-file in wide-format.
The participants have been measured at 20 time-points, so there is a maximum of 20 observations per participant. Each data set contain the longitudinal information for one test.
The data I have been supplied with is divided into multiple SPSS-files, which all are in "long-format". I am working on a project compiling data from a longitdinal study with approx 300 participants.
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