Line Graphs on Tuva (v2)
Lesson
The Tuva line graph is essentially a scatter plot with lines connecting the dots. The line graph is used when the points have a specific order; for example, when they are ordered by time. Typically, the order variable (time) goes on the x-axis, but not always. Creating Line Graphs: Step 1: You need to drag and drop a quantitative attribute on each of the axes to create a scatter plot first. ![]700 Step 2: Next, you need to select :ti[line-graph] from the toolbar to create the graph. ![]700 Reading Line Graphs: Any dot in the line graph represents two values, the x-value and the y-value. You can use the reference lines to connect the dots to actual values on the axes and read the value or hover over a case to read the x- and y-values. ![]700 Move from left to right to study the overall pattern of the graph. Line graphs are useful for studying localized patterns of change as they show the ups and downs in the y-values between different pairs of the x-values. You can also analyze small scale and large scale changes to study short term and long term trends in the data. Displaying Multiple Attributes: Tuva provides the facility to drop multiple quantitative attributes on an axis. This allows you to create line plots and compare how different attributes trend in relation to another ordered attribute. Let’s say we want to compare the change in performances of men and women in the 100 m dash. Begin with a regular scatter plot and drag and drop a third attribute in the rectangle adjacent to the attribute on the y-axis. ![]700 After dropping the third attribute, click on :ti[line-graph] in the toolbar. Your graph will look like this: ![]700 Tuva also allows you to color by or order by a third attribute and create a line graph by category. Here are the steps: Step 1: Create a scatterplot and drop a categorical attribute in the Legend Area. ![]700 Step 2: Click on :ti[line-graph-by-category] in the toolbar. ![]700 In the interactive tutorial that follows, you will explore the US States dataset and create a variety of your own line graphs on Tuva . ![]720
Line Graphs on Tuva A line graph shows how values change when data points follow a specific order, most often time. Each case appears as a dot, and lines connect the dots to make patterns of change easier to see. On Tuva, a line graph is created by connecting points in a scatter plot. This makes line graphs useful for exploring short-term changes, long-term trends, and comparisons across attributes or groups. [---cta ⚡ Ready to practice? Jump straight into the interactive tool. ---]{border-left:#ecb606;buttons:[{"type":"enroll","text":"Enroll in series","bg":"#682D8A","color":"#ffffff","border":"#682D8A","icon":"ti ti-add"},{"type":"modeltool","text":"Try It Out Now","bg":"#ffffff","color":"#682D8A","icon":"ti ti-external","border":"#682D8A"}];} !![tuva]560x315 How It Works After creating a basic scatter plot with two numerical attributes, you can create line graphs in these ways: [---card Creating Line Graphs Start with a scatter plot using two numerical attributes Select :ti[line-graph] from the toolbar to create the graph ---]{border-color:#DADFE5;} [---card Reading Line Graphs Each point represents an x-value and a y-value Moving left to right reveals patterns and direction of change ---]{border-color:#DADFE5;} [---card Displaying Multiple Attributes Add an additional numerical attribute on the y-axis to display multiple lines Drop a categorical attribute in the legend area to color by or order by a third attribute and create a line graph by category ---]{border-color:#DADFE5;} [---card In a Nutshell Connecting points in order turns individual values into visible patterns of change. ---]{border-color:#DADFE5;} [---cta ⚡ Try It Out Jump straight into the interactive tool. ---]{border-left:#ecb606;buttons:[{"type":"enroll","text":"Enroll in series","bg":"#682D8A","color":"#ffffff","border":"#682D8A","icon":"ti ti-add"},{"type":"modeltool","text":"Try It Out Now","bg":"#ffffff","color":"#682D8A","icon":"ti ti-external","border":"#682D8A"}];}
Topics and standards: Line Graphs, Tutorial