Time series

Hello everyone.
I am trying to plot data from a time series in R and have run across some
problems. I was wondering if someone could help.
I have data taken every 15 minutes of a list of rankings of 25 titles. I
want to plot one of the article's titles's ranks as a time series.
I've been trying if statements with no success and am pretty new to R. Can
anyone help?

Thank you.

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