Download Data Smog: Surviving the Information Glut by David Shenk PDF

By David Shenk

Media pupil ( and net fanatic ) David Shenk examines the troubling results of knowledge proliferation on bodies, our brains, our relations, and our tradition, then bargains strikingly down-to-earth insights for dealing with the deluge.

With a skillful mix of own essay, firsthand reportage, and sharp research, Shenk illustrates the crucial paradox of our time: as our international will get extra advanced, our responses to it turn into more and more simplistic.He attracts convincing hyperlinks among information smog and tension distraction, indecision, cultural fragmentation, social vulgarity, and more.

But there is desire for a saner, extra significant destiny, as Shenk bargains a wealth of novel prescriptions--both own and societal--for dispelling facts smog.

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Each table in the array corresponds to the learner group. Multi-way tables in this format can be hard to understand. The ftable() function helps by producing a "flat" table. Try this: ’ftable(quine$Sex, quine$Age, quine$Lrn)’. table() functions to compute the table margins. table,2)’ to get column margin. Note that you can also get these results by using the rowSums(), colSums() and apply() functions. Sometimes you will want to tabulate a value, rather than the number of cases (as table() does); for example, when tabulating population totals from a survey using expansion factors.

Type "sort(UScereal[,4])" to sort the UScereal$fat column. Notice that the vector is returned in ascending order. A good function to use with sort is rev(), which will reverse the order of a vector. Try "rev(sort(c(2,4,5,6,3,2)))" to sort the vector in ascending order and then reverse the result. ORDER The order() function allows you to sort data frames as well as vectors. It works in a different way, however, that may take a bit of time to fully understand. While sort(x) will return x sorted in ascending order, order(x) will return a vector that gives the indexes of x in the order of the values of x.

SORT The sort() function sorts a numeric vector in ascending or descending order. Type "sort(UScereal[,4])" to sort the UScereal$fat column. Notice that the vector is returned in ascending order. A good function to use with sort is rev(), which will reverse the order of a vector. Try "rev(sort(c(2,4,5,6,3,2)))" to sort the vector in ascending order and then reverse the result. ORDER The order() function allows you to sort data frames as well as vectors. It works in a different way, however, that may take a bit of time to fully understand.

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