Plot Page - Polar Plots

The polar plot properties Plot page contains the options to change the data file and set columns; create fit curves in the plot; and add a new plot to the graph. To view and edit line/scatter plot properties, click on the line/scatter plot in the plot window or Object Manager to select it. Then, click on the Plot tab in the Property Manager.

 

Change the polar plot properties in the Property Manager on the Plot tab.

 

Plot Type

The Plot type property displays the type of plot.

 

Worksheet

Click the existing data file path and file name next to Worksheet to select a different data file for the plot. Click on a currently open worksheet or click the Browse option to navigate to a worksheet that is not yet open. Select a different data file in the Open Worksheet dialog, and click the Open button to change the data. The plot automatically updates.

 

NOTE: The worksheet columns are retained after changing the worksheet. If any of the column options are blank after changing the Worksheet, click on the blank option and select the desired column. A blank next to column means that the column does not exist in the new worksheet.

 

Select the Data in rows option if your data file is formatted where each row includes one variable. When the Data in rows option is selected, all plot properties that require data values are specified by selecting a data row. This includes variables such as X and Y, data labels, worksheet ranges, etc.  Properties that list column letters will update to list row numbers. When switching from plotting data in columns to plotting data in rows, Grapher may not be able to select the correct rows automatically. Verify the correct rows are selected.

 

The property descriptions below refer to data columns, but when Data in rows is selected the property lists will include rows.

 

Data Columns

Click on the column name next to the Direction column and Radius column fields to change the columns used to create the plot. In the list that appears, select the new column. If the first worksheet row contains header information, the header information appears next to the column letter.

 

Aside from the columns containing data there are two other options, row number and sequence number. These options are available in the list that appears before the first column.

  • Selecting the Row number option plots the axis with the row numbers used in the Worksheet rows section. For example, if the first row is number two, the axis begins at a value of two.

  • The Sequence number option plots the data according to the total number of rows used. The sequence number always begins with the number one regardless of which rows are selected in the Worksheet rows group. Blank lines between rows are ignored when calculating the value. The sequence number increments by one when rows are adjacent or when rows are skipped.

 

When changing the Direction column or Radius column to a date/time column from a numeric column, the Use date/time format option for the corresponding axis Tick Labels will automatically be checked to match the new data. When changing the columns to a numeric column from a date/time column, the Use date/time format option for the corresponding axis Tick Labels will automatically be unchecked to match the new data.

 

NOTE: The worksheet columns are retained after changing the worksheet. If any of the column options are blank after changing the Worksheet, click on the blank option and select the desired column. A blank next to column means that the column does not exist in the new worksheet.

 

Missing Data

Rows containing text or blanks in the plotted columns are ignored and are not plotted on the graph. You can display the missing data as part of a continuous or discontinuous line using the Missing data options. Setting Missing data to Continuous plot connects the data line before and after the missing data. Setting Missing data to Discontinuous plot breaks the line at the missing data sections of the data set. Data filtered using the Criteria settings are not included as missing data. Missing data is not available for all plot types.

 

This plot has the Missing data option set to Discontinuous plot. The line breaks across the missing data point.

This plot has the Missing data option set to Continuous plot. The line continues and does not break across the missing data point.

 

New Plot

Click the Create button next to the New plot command to create a new plot based on the current data file. A new plot is created using the same Radius column as the selected plot. The Angle column changes to the next column in the worksheet that contains data. For example, if a selected line/scatter plot uses column A for the Radius column and column B for the Angle column, clicking Create generates a new line/scatter plot with column A for the Radius column and column C for the Angle column.

 

The new polar plot is selected so you can change the new plot's properties. The line, fill, and/or symbol color automatically changes to a new color. The Plot palette option on the Options dialog Plots page controls the colors for plots added via the Create button in the Plot page.

 

Fit Curves

Click the Home | Add to Graph | Fit Curve command to add a fit curve to the graph. This adds a linear fit by default. Many fit types are available.

 

 

See Also

Polar Plot

Plot Types