November 2017
Beginner to intermediate
366 pages
7h 59m
English
Content preview from R Data Analysis Projects
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DSD connecting to memory, file, or database
DSD_Memory provides a streaming interface to a matrix or a dataframe in memory. One of the interesting ways to use DSD_Memory is to make it replay an old stream data.
Let us look at a small R example:
> random.stream <- DSD_Gaussians(k = 2, d = 4, mu = rbind(c(200,77,20,750),c(196,80,16,790)))> data.un <- get_points(random.stream, n =2000)> head(data.un) X1 X2 X3 X41 199.9456 77.09095 19.98670 750.11292 195.9696 80.10380 16.01115 789.97273 196.0109 79.95394 16.08678 790.10424 199.9882 77.03385 20.00825 750.00695 200.0485 76.84687 19.94311 750.01306 200.0462 76.94537 20.00657 750.0701>
We used DSD_Gaussian to create some random four-dimensional records, and have stored them in a dataframe called ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.