Eluvias comments

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                                            Eluvias

apply coerces to matrix, inane design decision

``` r library(plyr) a = c(TRUE, FALSE, TRUE, FALSE, TRUE, TRUE) b = c('a', 'b', 'c', 'de', 'f', 'g') c = c(1, 2, 3, 4, 5, 6) d = c(0,...

ROC discrete/continuous produces wrong answers for negative values

This is because `TTR` is applied on financial price series; no negative prices. So , `ROC` works fine in this context. But there is a corner case : for example...

ifelse fails with multi-column xts object

Revert back to xts 0.9-7 on your latest R version. ```r devtools::install_version("xts", version = "0.9-7") ```

Printing the first and last n observations for xts and/or zoo?

If it helps, here is one approach. Of course needs testing, but it works for me so far. ``` r library(xts) xts_print #> Index Open High Low Close #> 1:...

`endpoints()` returns unexpected values when `on = years` and k > 1

You're right it's annoying, I missed it.

roll_mad() - Mean | Median Absolute Deviation

An `R` package with a rolling `mad` implementation is [TTR](https://www.rdocumentation.org/packages/TTR/versions/0.23-4) with [runMAD()](https://www.rdocumentation.org/packages/TTR/versions/0.23-4/topics/runSum) function which has the option `stats` to return either the rolling median or mean absolute deviation. Another `R`...