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Trillion-Row Spreadsheet
The Trillion-Row Spreadsheet (TRS) allows you to visually interact with your data.
Analyze
The Analyze tab displays the object browser and the Analysis Timeline.
Amending values
Replace the values in a table or worksheet using the amend operation.
Amend values in a column using an expression
Recompute the value of a column or specific rows of a column by using a value expression.

Trillion-Row Spreadsheet
The Trillion-Row Spreadsheet (TRS) allows you to visually interact with your data.
- Analyze
  The Analyze tab displays the object browser and the Analysis Timeline.
  - Object browser
    The object browser provides a hierarchy of folders and objects to which you have access. Use the object browser to select the base table or query for your analysis.
  - Analysis Timeline
    The Analysis Timeline displays a visual representation of your data analysis in the Trillion-Row Spreadsheet.
  - Selecting rows
    Selecting rows is one of the most basic tasks in the 1010data Insights Platform. Use row selection to isolate data that is important to your analysis and create more efficient queries.
  - Sorting rows
    You may reorder the rows of a table such that the values in a particular column are in ascending or descending order.
  - Arranging columns
    You can display a subset of the columns in a table and specify the order in which they appear.
  - Linking tables and worksheets
    Use linking to combine tables or worksheets into a single, bigger table with columns from both.
  - Computed column
    A computed column is a column that you add to a table, whose values are typically based on one or more existing columns.
  - Summarizations and tabulations
    Some of the basic ways to analyze your data include quick summaries, tabulations, and cross tabulations.
  - Merging tables and worksheets
    You can merge two or more tables or worksheets to combine their rows together into a single, larger worksheet.
  - Amending values
    Replace the values in a table or worksheet using the amend operation.
    - Amend column panel
      The Amend column panel allows you to choose a column and enter a value expression to replace values in a table or worksheet.
    - Amend values in a column using an expression
      Recompute the value of a column or specific rows of a column by using a value expression.
    - Amend a single value within the grid
      Change the value of a cell directly from within the grid.
  - Running custom code
    You can run custom SQL, Python, R, or K3 code within the TRS Analysis Timeline.
  - Miscellaneous operations
    In addition to the five basic operations, you can choose to use a miscellaneous operation in the Trillion-Row Spreadsheet.
- Query
  The Query tab displays the current timeline query as Macro Language XML code. It also provides the ability to undo and redo operations in the timeline.
- View
  Select among the ways to view and interact with the data resulting from your analysis.
- Visualize
  The 1010data Insights Platform provides a mechanism to generate high-quality charts, which in turn can support the notion of visual data discovery.
- Develop
  Use the query that represents your analysis as a base for further development.
- Export
  Export the data resulting from your analysis to various destinations.
- Results pane
  The results pane is displayed on the right side of the Trillion-Row Spreadsheet window and Macro Language Workshop.

Amend values in a column using an expression

Recompute the value of a column or specific rows of a column by using a value expression.

The amend operation allows you to recompute the value of a column or specific rows of a column. Although generally this can be done with a computed column, the amend operation makes it easier, particularly if you only want to recompute specific rows.

To amend values in a column using an expression:

Open the Amend column panel by doing one of the following:
- In the New operation panel, click Amend.
- In the grid, right-click a cell within the column in which you want to amend values and click Amend [COLUMN_LABEL].
Note: In this topic, [COLUMN_LABEL] represents the label of the column in which the selected cell is located.

The Trillion-Row Spreadsheet displays the Amend column panel.
Note: The Amend column panel available in the grid is visually different from the panel in the Analysis Timeline. While the panels vary slightly from one another, the available fields and functionality is identical. For illustration purposes, this topic shows images of the Amend column panel as it appears in the timeline.
In the Column to amend drop-down list, select the column containing the values you want to amend.

Note: If you opened the Amend column panel from the grid, the Column to amend drop-down list should already contain the correct column as it is based on the cell selected in the grid.
In the Expression Editor field, enter a value expression.

For more information, see Writing Expressions in the 1010data Reference Manual. For more information about the Expression Editor, see Expression Editor.
Optionally, to amend only specific rows, complete the following:
1. Select the Amend only on specific rows option.
  The Trillion-Row Spreadsheet displays a second Expression Editor field.
2. In the Amend only on those rows where Expression Editor field, enter a selection expression to select a subset of rows.
Click the Submit operation () icon.
The Trillion-Row Spreadsheet displays the results of the amend in the grid.