You might think of Microsoft's Excel as your only tool to handle data and create plots. But frankly, I hate to use Excel for charts and graphs because it lacks the flexibility I need and formatting ...

Data is rarely so uniform and predictable that plotting data points creates a perfectly linear arrangement. Scatter charts might have wildly varying plots that create a seemingly random correlation ...

I want to plot those on the same chart to compare their trends against each other. Days passed on the x axis, value on the y, a line for each.