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How do I insert a placeholder in a plot where I don't have data?

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Victoria Helm
Victoria Helm 16 Jun 2020
댓글: dpb 17 Jun 2020
I'm making a plot from two columns/variables in my data table where one of the variables is the day that the data was collected on. I want to look for trends/patterns in my data as the number of days increases. However, there are certain dates on which I did not collect any data. So I'd like to insert a place holder on the dates when no data was collected and include these in my plot. Is this possible?

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Victoria Helm
Victoria Helm 16 Jun 2020
So no, I'm not using a timetable. Simply, a data table.
Victoria Helm
Victoria Helm 16 Jun 2020
I know how to use markers and change the x-axis ticks. I'm trying to find a way to prevent my plot from dropping off to zero on the y-axis because I'm dealing with daily data. It looks like I might need to work with a timetable rather than a data time like dbp mentioned.
dpb
dpb 17 Jun 2020
" I'm trying to find a way to prevent my plot from dropping off to zero on the y-axis..."
That's why I asked about "showing" versus "nonshowing" markers.
Use NaN or (NaT if x-axis is datetime)
It would be much easier to write actual code example if we knew what your data format looked like -- still for the purpose the timetable or a table with the time/date column as a datetime would make it drop-dead simple.

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the cyclist
the cyclist 16 Jun 2020
You could use interpolation to identify where the "trend" would be at the missing data point, and plot the interpolated values as a different symbol.

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