Petal Width, Cm Petal Width, Cm
نویسندگان
چکیده
There are several reasons why this book might be of interest to a TEX user. First, LTEX has a prominent place in the book. Second, the book describes a very interesting offshoot of literate programming, a topic traditionally popular in the TEX community. Third, since a number of TEX users work with data analysis and statistics, R could be a useful tool for them. Since some TUGboat readers are likely not familiar with R, I would like to start this review with a short description of the software. R [1] is a free implementation of the S language (sometimes R is called GNU S). The latter is a language for statistical computations created at Bell Labs during its “Golden Age” of computing, when C, awk, Unix, et al. were developed at this famous institution. S is very convenient for a data exploration. For example, consider the dataset iris (included in the base R distribution) containing measurements of 150 flowers of Iris setosa, Iris versicolor and Iris virginica [2]. We may inquire whether petal length and petal width of irises are related. To this end we can plot the data:
منابع مشابه
Investigating the independent evolution of the size of floral organs via G-matrix estimation and artificial selection.
The attractiveness of a plant to pollinators is dependent on both the number of flowers produced and the size of the petals. However, limiting resources often result in a size/number trade-off, whereby the plant can make either more flowers or larger flowers, but not both. If developmental genes underlying sepal and petal identity (some of which overlap) also influence size, then this shared ge...
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