Data visualization is quite important for analysts, researchers, or scientists. A few days ago, we saw many visualized charts on news, website, or slides, to emphasize the outbreak and affection of COVID 19. Today, I would like to follow this trend, using **John Burn-Murdoch’s chart as a good example **and providing you with 3-step tips to make better of your charts.

Step 1, Review materials

The material here means your data. There are tons of columns in your data sets and for a chart, you must need to understand what is your topic. In this step, you must decide which information you want to disclose in your charts. In our example, the number in the chart is the confirmed case with the testing process. Some countries had lower cases just because they haven’t started testing yet. Use the proper key figures is quite important.

Time Frame

The key point here for a chart is to compare with others and differentiated the present. So we need to put our data on the same page. In the example case, the time frame started from the point of the 100th case confirmed, which eliminate the date difference of the first case and the transmission gap.

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