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mpnewbie
New Contributor

Why do data points disappear when I choose a continuous scale?

Hi,

I have a line graph that graphs test results per person (for over 30 people) after certain numbers of months since starting a program. An example of how the data is structured is below:

Person
Months since startingTest Score

PersonA

126
PersonA234
PersonA532
PersonB131
PersonB319
PersonB941

Months is on the x-axis (goes up to around 60), Test Score is on the y-axis, each person has their own line (for over 30 people).

Not every month will have a test score, meaning that when the x-axis does NOT have a continuous scale, the distance between Month 24 and Month 36 can look the same as the distance between Month 1 and Month 2 (which is not ideal).

But when I choose to have the scale be continuous, the data for several subjects disappears from the graph. Why does this happen?