Create a line plot with symbols

You can create a graph like the following example using data arranged in different layouts in the worksheet.

This line plot compares the response patterns of the diameters of plastic pipes measured over three weeks. The pipes were produced by two different machines.

To create a line plot with symbols, choose the layout option that is similar to your worksheet.

Option 1

Follow these steps if your worksheet contains a column of measurement data and two columns of categorical data for grouping.

Example worksheet

C1 C2-T C3
Diameter Time Machine
5.19 Week 1 1
5.57 Week 2 1
8.73 Week 3 1
5.53 Week 1 2
... ... ...
  1. Choose Graph > Line Plot.
  2. Under With Symbols, choose One Y, then click OK.
  3. Under Function, choose the function of the graph variable that you want to graph. In the example, Mean is the function.
  4. Under Graph variables, enter a column of numeric or date/time data. In the example, Diameter is the graph variable.
  5. Under Categorical variable for X-scale grouping, enter a column of categorical data for the x-axis scale. In the example, Time is the categorical variable for x-scale grouping.
  6. Under Categorical variable for legend grouping, enter a column of categorical data to be defined in the legend. In the example, Machine is the categorical variable for legend grouping.
  7. Click OK.

Option 2

Follow these steps if your worksheet contains multiple columns of measurement data and each column is a group, plus a column of categorical data for grouping.

Example worksheet

C1 C2 C3 C4
Week 1 Week 2 Week 3 Machine
5.19 5.57 8.73 1
5.53 5.11 5.01 2
4.78 5.76 7.59 1
... ... ... ...
  1. Choose Graph > Line Plot.
  2. Under With Symbols choose Multiple Y's, then click OK.
  3. Under Function, choose the function of the graph variable that you want to graph. In the example, Mean is the function.
  4. Under Graph variables, enter multiple columns of numeric or date/time data. In the example, Week 1, Week 2, and Week 3 are the graph variables.
  5. Under Categorical variable for grouping, enter a column of categorical data. In the example, Machine is the categorical variable for grouping.
  6. Click OK.

Option 3

Follow these steps if your worksheet contains multiple columns of summarized data. You can have a corresponding column of row labels (optional).

Example worksheet

C1 C2 C3 C4
Week 1 Week 2 Week 3 Machine
4.62 5.72 6.9 1
5.42 5.22 5.16 2
  1. Choose Graph > Line Plot.
  2. Under With Symbols, choose Series in Rows or Columns, then click OK.
  3. Under Graph variables, enter multiple columns of summarized numeric or date/time data. In the example, Week 1, Week 2, and Week 3 are the graph variables.
  4. Under Label column (optional), enter a column of categories that correspond to the rows. In the example, Machine is the label column. If you don't enter a label column, Minitab uses the row numbers as labels.
  5. Under Series Arrangement, choose the arrangement to graph. In the example, Each row forms a series is the arrangement. The series that you choose (row or column) appears in the graph legend, and the other series appears as the X-scale label.
  6. Click OK.
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