Sorry for the slow reply, I’ve been out of town. I’m planning a new edition, but it’s probably two years away. The R side will benefit greatly from the tidyverse packages. If you have ideas, please send them my way & I’ll acknowledge you in the preface.

Cheers,

Bob

Thanks for writing. You motivate me to keep going!

Cheers,

Bob

That is the URL for Microsoft’s OneDrive, so it’s safe.

Cheers,

Bob

— Best,

J. ]]>

I tend to rely on R for the tools but the same task in Python2 yields more accurate results consistently then R. Verified using a basic calculator! Don’t underestimate the mere calculator. R has great tools but fundamentally flawed without having implemented arbitrary precise arithmetic. R may be “faster” due to its raw use of floating point calculations but it lack accuracy due to it and many a time I’ve discredited my own findings with R using a calculator and more importantly I’ve shown that 6 months of work others have done yielded inaccurate results simply because they don’t know to account for arbitrary precise arithmetic. ]]>

Thanks for your comments. The head function does indeed show a nice subset of rows, but if you have lots of columns, it gets quite messy! The tidy approach looks at the width of your screen & shows you as many columns as will fit.

Cheers,

Bob