By Deborah Nolan, Duncan Temple Lang
ISBN-10: 1482234815
ISBN-13: 9781482234817
This ebook offers case reports in statistical computing for information research. each one case examine addresses a statistical software with a spotlight on evaluating assorted computational techniques and explaining the reasoning in the back of them. The case stories can function fabric for teachers educating classes in statistical computing and utilized records. The e-book aids readers in knowing the concept means of info research and the way to cause approximately computing.
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Extra info for Data Science in R: A Case Studies Approach to Computational Reasoning and Problem Solving
Example text
We discard the lines starting with the comment character ‘#’ and then pass each remaining line to processLine(). = "#" ] tmp = lapply(lines, processLine) When we run this, we get 6 warnings of the form 1: In matrix(tokens[c(2, 4, 6:8, 10)], nrow(tmp), 6, byrow = TRUE) : data length exceeds size of matrix Predicting Location via Indoor Positioning Systems 11 In general, we want to be very cautious about warning messages. We can try to find the rows to which these warning messages correspond by exploring the result, but it is easier to catch them as they occur.
Table(). However, there is structure in the observations that we can use to process the lines of text. For example, the main data elements are separated by semicolons. 0" "00:14:bf:b1:97:8a=-38,2437000000,3" "00:14:bf:b1:97:90=-56,2427000000,3" "00:0f:a3:39:e1:c0=-53,2462000000,3" "00:14:bf:b1:97:8d=-65,2442000000,3" "00:14:bf:b1:97:81=-65,2422000000,3" "00:14:bf:3b:c7:c6=-66,2432000000,3" "00:0f:a3:39:dd:cd=-75,2412000000,3" "00:0f:a3:39:e0:4b=-78,2462000000,3" "00:0f:a3:39:e2:10=-87,2437000000,3" "02:64:fb:68:52:e6=-88,2447000000,1" "02:00:42:55:31:00=-84,2457000000,1" Within each of these shorter strings, the “name” of the variable is separated by an ‘=’ character from the associated value.
According to the documentation, the access points consist of 5 Linksys/Cisco and one Lancom L-54g routers. 4). We do have 5 devices with an address that begins 00:14:bf, which matches with the Linksys count from the documentation. However, none of our MAC addresses begin with 00:a0:57 so there is a discrepancy with the documentation. Nonetheless, we have discovered valuable information for piecing together a better understanding of the data. For now, let’s keep the records from the top 7 devices.
Data Science in R: A Case Studies Approach to Computational Reasoning and Problem Solving by Deborah Nolan, Duncan Temple Lang
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