timesnap | js program that takes screenshots | Automation library
kandi X-RAY | timesnap Summary
kandi X-RAY | timesnap Summary
timesnap is a Node.js program that records screenshots of web pages that use JavaScript animations. It uses timeweb and puppeteer to open a web page, overwrite its time-handling functions, and record snapshots at virtual times. For some web pages, this allows frames to be recorded slower than real time, while appearing smooth and consistent when recreated into a video. You can use timesnap from the command line or as a Node.js library. It requires Node v8.9.0 or higher and npm. To record screenshots and compile them into a video using only one command, see timecut. For using virtual time in browser, see timeweb. timeweb (and timesnap by extension) only overwrites JavaScript functions and video playback, so pages where changes occur via other means (e.g. through transitions/animations from CSS rules) will likely not render as intended.
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QUESTION
I have multiple data variables that are collected at 15 minute intervals, however some of the variables have timestamps slightly off because the internal clocks in the various sensors were not aligned exactly. In order to merge the various measurements easily, I want to align all timestamps to the closest 15 minute mark.
I want to use something like xts::align.time(), however this function always snaps forwards. I want to be able to snap backwards, or even better, use smart rounding rules. How can I do this?
Here is example code of what I'd like to do using align.time():
...ANSWER
Answered 2018-Sep-23 at 15:04I had a look at align.time
and the version you need is align.time.POSIXct
. Now I would assume you could supply a negative n, but you can't.
But you can do two things, create your own align.time function or use floor_date
from the lubridate package. This will round to the nearest unit. Check ?floor_date
for all possible options.
Creating your own function would be like what I did below. I just removed the negative restriction from align.time.POSIXct
and created the function my_align_time
.
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