I have four angles and I like to show them in a angle–time graph using Matlab’s plot function. The problem is the naming of vertical y-axis. Should it be:

  • plural, i.e., Position Angles since the graph is showing four different angles, or
  • singular, i.e., Position Angle as shown below since the important point is the meaningful explanation of axes regardless of parameter count given in the graph?

The plot mentioned in the question with singular y-axis naming

  • I'm voting to close this question as off-topic because it is about charting conventions, not academia
    – 410 gone
    Feb 7, 2016 at 5:14
  • I am writing a master thesis so I like to take opinion of people here rather than those at english.se. I think this is a nice point and should stay for reference.
    – Mehmed
    Feb 7, 2016 at 9:40

1 Answer 1


You should use the singular, "Position Angle," because an axis is interpreted as referring to each data element individually.

In order words, at time 0.4, the red line is not at approximately "60 angles," but is at an angle of approximately 60 degrees.

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