Avoid gap in chart in Excel
For example, in a range of monthly sales data, if a particular month's sales figure is missing, the line chart is discontinuous as shown below.

To do it in Excel, here is the answer:
a) Right click on the chart area and then click "Select Data".

b) Click on "Hidden and Empty Cells"

c) Click on "Connect data points with line". Click OK -> OK.

d) The missing data point is ignored and the chart line is continuous.

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