How to record the highest and lowest temperatures with composite bar charts?

To record the highest and lowest temperatures using a composite bar chart, you can follow these steps:

1. Collect a week's temperature data and input it into Excel.

2. Create a new chart in Excel and select Double Bar Chart as the chart type.

3. In the "Double Bar Chart", "Maximum Temperature" and "Minimum Temperature" are selected as two different data series.

4. Choose an appropriate color or style for each data series to distinguish them.

5. Set the horizontal axis as time (for example, hours or minutes per day) and the vertical axis as temperature value.

6. Adjust the layout and style of the chart to make it easy to read and understand.

In this way, you can record the changes of the highest and lowest temperatures in a chart at the same time, so as to better understand the trends and changes of temperature in the whole time period.