Line Graphs on Tuva
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
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
Topics and standards: Line Graphs, Tutorial