Mark Heckmann

Mark Heckmann has asked 42 questions and find answers to 34 problems.

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About

I am a PhD candidate at the faculty of Psychology at Bremen University, Germany. More about me: www.markheckmann.de

Mark Heckmann questions

How to properly handle timezone when passing POSIXct objects between R and Postgres DBMS?
reading SPSS file into R throwing error - error reading system-file header
using plotmath symbol in ggplot2 geom_text - legend is altered - why?
psych::principal - explanation for the order and naming of rotated (principal) components
serving static files with plumber package - files not found (404)
replicating an rgl viewpoint in lattice
generate (overlapping) sets of mutually similar elements from binary similarity matrix [duplicate]
Print/save Excel (.xlsx) sheet to PDF using R
knitr: how to use child .Rnw docs with (relative) figure paths?
remove quotation marks from string at beginning and end only if both are present

Mark Heckmann answers

Generate random number of missing values in R
remove all quotation marks from a data frame
Change timezone in a POSIXct object
making sure a function does not use a global variable [duplicate]
How to use the "[" function to select a row / column of a matrix
Print/save Excel (.xlsx) sheet to PDF using R
Why apply() does not work on my dataframe in R?
knitr: how to use child .Rnw docs with (relative) figure paths?
selecting rows with specific conditions in R
Dynamic Variable naming in r