ifreak questions

• draw lines around specific areas in geom_tile
• multithreading system calls in python
• subset data frame by skipping a specific number of rows
• subset of prcomp object in R
• python not recognizing new created files
• manual adjustement of newick tree and usage of ETE
• alternative for wilcox.test in R
• sort a data frame manually using non numeric column
• append rows to dataframe using foreach package
• change axis scaling step size in ggplot2

ifreak answers