# How long did my R script run?

This to the beginning: strt<-Sys.time() And this to the end: print(Sys.time()-strt) Example output: print(Sys.time()-strt) Time difference of 16.39691 secs

# Adding space between rows in LaTex tables

By default, LaTex tables are very tight: \usepackage{booktabs} \begin{table}[] \centering \caption{My caption} \label{my-label} \begin{tabular}{@{}lll@{}} \toprule Rows & Column 1 & Column 2 \\ \midrule Row 1 & 1234 & 2345 \\ Row 2 & 3456 & 4567 \\ Row 3 & 5678 & 6789 \\ Row 4 & 7890 & 8901 \\ Row 5 & 9012 & 10000 \\ \bottomrule \end{tabular} \end{table} Adding this to the document preamble will add space between the rows:

# My minimal LaTex preamble


# How to "increase" array resolution in R (replicate each element both column-wise and row-wise)

One picture says more than a thousand words. You have what is one the left, and you want what is on the right. my_matrix = matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), nrow=3) #matrix is a 2D array, this next row creates a third dimension, #duplicating the data my_array = array(my_matrix, dim = c(3,3,2)) There are a few different ways to do this, but by far the cleanest and quickest way is to just select the rows and columns multiple times, by replicating row and column numbers (instead of actually replicating each element):

# Cut a time period from netCDF with nco

ncks -d time,start_time,end_time in.nc out.nc start_time and end_time are integers. Add -F, if you want to use Fortran indexing (to start from 1). No space between dimension name and start-end points!

# Converting R Markdown to Latex

Install Pandoc: http://pandoc.org/ library(knitr) knit('report.Rmd') #This creates 'report.md' Open the Terminal, Command Prompt (search for cmd) or Windows Powershell, go to the folder and do: pandoc -s report.md -o report.tex And that’s it! (Read this, if you want vector images.)

# Reordering factor levels in R and what could go wrong

I’ve recently started using ggplot2 in addition to lattice (see this post that I made a while ago, explaining how I got into using lattice in the first place). Hint: when using ggplot2, you’ll need to use of the reshape2 package (also written by the amazing Hadley Wickham) to get your data into a form that ggplot2 works best with. Another thing that you’ll want to think about when using ggplo2 is factor levels.
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#### Riinu Ots

if it aint broke, you’re outdated

Data Manager

Edinburgh, UK