Plotting multiple lines in Tableau

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I looked in every forum I could find but couldn't locate a precise solution. I'm new to Tableau and need to do a task that I assumed would be simple but can't seem to figure out.

I'm trying to make a graph with numerous lines drawn on it. I have timestamps in seconds in one column (decimal). I have four columns connected with each timestamp value (Temperature, Pressure, Humidity, and Voltage), and I need to see how they progress over time. The data in Excel looks like this (I simplified it for the sake of visualisation):
Grt0i.png (333×289)

In Excel, it takes me less than seconds to obtain a chart that looks like this:

enter image description here

How can I make a Tableau version of the same chart? I'd want someone to explain how each column should be structured, whether the data must be a dimension or a measure, the data type for each (string, integer, etc. ), and the graphic steps to take. I'd do it in Excel, but the file is about 1 million rows long, and Excel keeps crashing.

Mar 10, 2022 in Tableau by Neha
• 8,940 points
309 views

1 answer to this question.

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  1. First, drag & drop measure values & timestamp.

    enter image description here

    EDIT - first make Timestamp a dimension instead of a measure, and make sure it remains continuous instead of discrete. So you should not see the word SUM in front of Timestamp

  2. Then remove no. of row & timestamp from the measure values.

    enter image description here

  3. Then uncheck aggregate measure.

    enter image description here

EDIT this step is not usually needed or desirable. If you do have multiple recordings per Timestamp, you will want to select the best aggregation function for each measure, perhaps AVG or MEDIAN instead of SUM

  1. Now select line from mark and drag measurement to color

    enter image description here

answered Mar 14, 2022 by Vaani
• 7,020 points

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