To address your requirements using either a Scatter Chart or Line Chart with marker points, you can follow these steps in Power BI:
**Option 1: Scatter Chart**
1. **Create a Scatter Chart**:
- In Power BI Desktop, create a new Scatter Chart visual.
2. **Data Preparation**:
- In the "Values" section of the visual:
- Place your date column in the "X-axis" section.
- Place your values column (e.g., "Values") in the "Y-axis" section.
3. **Add a Legend**:
- To differentiate data points by different categories or legends, you can create a new calculated column in your data or use an existing column that represents the categories.
- Place this calculated column in the "Legend" section of the visual.
4. **Formatting**:
- Customize your Scatter Chart as needed, such as adjusting marker colors, shapes, sizes, and axis labels.
5. **Date as Numerical**:
- To use a date on the X-axis of a Scatter Chart, you might need to convert your date values to numerical values. You can do this by creating a calculated column that represents the date as a numerical value (e.g., days since a certain reference date).
**Option 2: Line Chart with Marker Points**
1. **Create a Line Chart with Marker Points**:
- In Power BI Desktop, create a new Line Chart visual.
2. **Data Preparation**:
- In the "Axis" section of the visual:
- Place your date column in the "Axis" section (X-axis).
- In the "Values" section of the visual:
- Place your values column (e.g., "Values") in the "Values" section (Y-axis).
- Place the category column that you want to use as the legend in the "Legend" section.
3. **Formatting**:
- Customize your Line Chart with Marker Points as needed, such as adjusting line styles, marker colors, shapes, and sizes.
4. **Date as Numerical**:
- As with the Scatter Chart, you may need to convert your date values to numerical values to use them on the X-axis of a Line Chart.
To summarize, you can use a Scatter Chart with a legend for different categories or a Line Chart with marker points and a legend. In both cases, you might need to convert your date values to numerical values to use them on the X-axis. The legend should help differentiate data points by category or legend colors.
