R: Add NA concept and other small modifications

swcarpentry / DEPRECATED-bc

DEPRECATED: This repository is now frozen - please see individual lesson repositories.

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R: Add NA concept and other small modifications #857

Closed fmichonneau closed 9 years ago

fmichonneau commented 9 years ago

Summary of modifications:

removing trailing spaces
renamed/reformatted/restructured headers to make them clearer and coherent with rest of document
removed duplicated examples
demonstrated how to add elements also in the front of vectors
added section about NA (missing values)
attempted to clarify section about coercion

jdblischak commented 9 years ago

Thanks for the PR, @fmichonneau. The changes look good. Once the new repository is settled (see #880) we can decide the easiest way to get this merged.

fmichonneau commented 9 years ago

replaced by swcarpentry/r-novice-inflammation#56