nik questions

• how to make a pair combination per each line
• how to set the x-axis of barplot
• How to add median and standard deviation for each condition
• stop or restart the R CMD Rserve in ubuntu
• How to change the color of dendrogram for each group in a cluster
• how to find identical string in various columns of a data frame
• How to count strings separated by a semicolon
• error with a function to retrieve data from a database
• deleting all characters after a semicolon
• how to plot a figure with specific distance between each line

nik answers