6/9/2023 0 Comments Line graph examples![]() This version of the chart ( Figure 4-21) reverses the legend order, changes the palette to aĪlso makes the filled areas semitransparent ( alpha=. The legend can be reversed by setting the breaks in the The default order of legend items is the opposite of the Another type of graph that shows relationships between different data sets is the bar graph. They are commonly used to visualize data that changes. The example above depicts one of the simplest. In the example here, we used the uspopage data set: uspopageġ1901 < 5 9336 1901 5 - 14 17158. Figure 4: Example of a Line Graph With Multiple Data Series. Line charts display quantitative information as a series of data points connected by straight lines. Below is an example of a line graph that shows the change of the weight of a hamster over a period of four weeks. Often provided in a wide format, but ggplot2() requires data to be in long format. The sort of data that is plotted with a stacked area chart is The x values, whether inferred or manually set by us, like in the first example, are meant to be in the same shape as y. Line graphs can answer questions about your data, such as: How are numeric values distributed or summarized by category Example. ![]() Population growth in India and China Pollution levels. This results in much the same line plot as before, as the values of x are inferred. Sample Questions Birth and death rates in New Zealand Free time activities of the elderly in the U.S. ![]() Scale_fill_manual (values =c ( "black", "white" )) This results in much the same line plot as before, as the values of x are inferred. Geom_point (shape = 21, size = 3, position =pd ) + Stacked Area Chart Line charts can be configured into stacked area charts by changing the settings on the y-axis to enable stacking. Ggplot (tg, aes (x =dose, y =length, fill =supp )) + For example, to configure all line charts with spanGaps true you would do: true Data Structure All of the supported data structures can be used with line charts. Tg <- ddply (ToothGrowth, c ( "supp", "dose" ), summarise, length =mean (len )) # Save the position_dodge specification because we'll use it multiple times Library (plyr ) # Summarize the ToothGrowth data To set a singleĬonstant shape or size for all the points, as in Figure 4-16, specify shape or size outside of aes(): # Load plyr so we can use ddply() to create the example data set The default colors are not veryĪppealing, so you may want to use a different palette, using scale_colour_brewer() or scale_colour_manual(). Otherwise, the lines will be drawn on top of the points.įor multiple lines, we saw in Making a Line Graph with Multiple Lines how to draw differentlyĬolored points for each group by mapping variables to aesthetic Specify the points after the lines, so that they are drawn on top. If the points and lines have different colors, you should
0 Comments
Leave a Reply. |