SOCR EduMaterials Activities LineChart

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Revision as of 14:10, 8 February 2008 by IvoDinov (talk | contribs) (Example (Human Heights and Weights))
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LINE CHARTS

Background

Line Charts are often used for physical experiments. From the tables of collected data, values of physical processes can be visually analyzed by the use of line graphs. These charts are typically two-dimensional with unique values that are consecutively connected by a straight line. The dependent variable appears on the vertical axis and the independent variable appears on the horizontal axis.

Physical characteristics such as behaviors of the physical experiment may be easily determined by observing the visualizations of Line Charts.

For references, visit Wikipedia and More Examples.


Description

Go to the SOCR Charts and select Line Charts from the items located on the left, then select the demonstrations for Line Charts:

SOCR Activities LineCharts Chui 090607 Fig1.jpg

The image above is a demonstration of a Line Chart with multiple graphs. Notice that the values are connected by a straight line. In this graph, the independent variable lies on the horizontal axis and the dependent variable lies on the vertical axis.

In some events, the independent variables could lie on the vertical axis and the dependent variable could lie on the horizontal axis as long as the values are consistent with the graph. The image below demonstrates this:

SOCR Activities LineCharts Chui 090607 Fig2.jpg

Data Type and Format

By clicking Data inbetween the Graph and Mapping button, it allows users to input or vary the values of the data set. There are two different types of data that is allowed for plotting data points which are one categorical variable (e.g., Series) and the remaining values as quantitative variables (numerical values).

SOCR Activities LineCharts Chui 090707 Fig3.jpg

Example (Human Heights and Weights)

Generate a Line Chart of the first 20 pairs of the Human Height and Weight data. Copy the data with your mouse.

SOCR Activities ScatterCharts Dinov 020808 Fig3.jpg

Paste it in the SOCR Line Chart (Demo 1b).

SOCR Activities LineCharts Dinov 020808 Fig5.jpg

You should get Line plots for height and weight like this. Notice the summary statistics on the bottom!

SOCR Activities LineCharts Dinov 020808 Fig6.jpg

Applications

One of the most persuasive elements when proposing data and literature to others is a well-designed chart presentation.

For example, scientists may want to compare values of experiments. Suppose researchers are comparing the maximum speed of three different types of engines. Setting the independent variable as the trial number, the dependent variable will be the maximum speed measured for the corresponding event.

For students in physical sciences labs, graphing values of experiments in Line Charts may help present their outcomes in a more appealing way.



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