ECON 2B03 Lecture Notes - Bar Chart, Working Directory, Scatter Plot
13 Oct 2013
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Lecture # 3 (chap 1 & 2 continued ) Odesi: to use at home, log in through lib access at mcmaster library website and than try and use it, press tools and press choose working directory. Then cut and paste document name slid . into r studio. They are tabular summaries for 2 variables: cross tabulations, one variable represented by row heads, the other variable represented by column heads. Information for both variables entered in table cells. In r we use the xtabs ( ) function. Example (cross tabulations: adapted from pedhauzur (1997). Suppose that 7 out of 10 males are admitted to an engineering school while 4 out of 10 females are admitted. Ex: histograms, scatter diagrams, etc : speciality graphs. Combine elements from core graphs to display data in unique ways. Ex: bar graphs, pie charts, etc : 3d graphs. Identifies upper and lower class limits of data classes: vertical axis.
