According to CDC, 610,000 people die to heart disease every year - that's 1 in every 4 deaths. Heart disease is the leading cause of death for both men and women. Every year about 735,000 americans have a heart attack. Of these, 525,000 are first time heart attacks. High blood pressure, high cholestrol and smoking are the key risk factors for heart disease. About half of the americans have atleast one of these three risk factors.
The high level analysis of chart shows that northern and western states tend to have lower heart disease mortality rate as compared to southern states. In the previous section, we discovered that Montana has higher poverty rate than Wyoming. However, Wyoming has higher mortality rate than Montana even though Montana has higher poverty rate. Further research and analysis to necessary to better gain better understanding of relationship between poverty and heart disease.
One may wonder how gender influences the heart disease. Click the Next button to learn more.
Just a reminder that the visualization project is following the Martini Glass narrative visualization structure. This page represents the stem of the visualization structure. The user is still exploring author driven contents. The next button at the bottom of the page ( or Scene3 link in the navigation bar) will take user to the "jumping off point". Final page contains reader driven content and it allows users to interact with data and draw their own conclusions.
The navigation buttons at the top and the Next button at the bottom of this page represent the User Interface events. User interacts by clicking on the button or menu items to navigate to various part of this visualzation story. The hover event allows proper positioning of the tooltip.
The annotation is represented by the legend on the top-right of the chart and a tooltip when mouse is hovered over the bars in the chart. The legend and labels along the X and Y axis provides additional annotations for the chart.
The mouse click event acts as a trigger to faciliate back and forward navigation in this visualization presentation. The mouse hover (mouseover) event is a trigger for the tooltip in the bar chart. The mouse over event triggers a opacity change in the closest bar to the mouse position. As mouse moves from one bar to another, changes in X and Y position causes opacity to revert back to its original state in the previous bar and change in the new bar.
This section is hyper linked to the previous and next section. The name of the target section is passed as an input paramter to the buttons and navgiation bar items. The data is passed as a JSON object to Vega API function for rendering axis,bars and tooltips for the chart.
The chart uses the Vega library. Vega is a declarative language and entire chart including data is defined as a JSON object. The data for the chart is passed as a JSON object to Vega API function for rendering axis,bars and tooltips for the chart. The JSON object is stored seperately in the overallchart.json file under data folder.