# tLineChart Reads data from an input flow and transforms the data into a line chart in a PNG image file to ease technical analysis. ## tLineChart Standard properties These properties are used to configure tLineChart running in the Standard Job framework. The Standard tLineChart component belongs to the Business Intelligence family. The component in this framework is available in all Talend products. ## Basic settings | Properties | Description | | --- | --- | | Schema and Edit
Schema |

A schema is a row description. It defines the number of fields (columns) to be processed and passed on to the next component. When you create a Spark Job, avoid the reserved word line when naming the fields.

Information noteNote:
The schema of tLineChart contains three read-only columns named series (string), x (integer), and y (integer) respectively, in a fixed order. The data in any extra columns will be only passed to the next component, if any, without being presented in the generated line chart.
Built-in: The schema is created and stored locally for this component only. For more information about a component schema in its Basic settings tab, see Basic settings tab.
Repository: The schema already exists and is stored in the Repository, hence can be reused. For more information about a component schema in its Basic settings tab, see Basic settings tab.

| | Sync columns | Click to synchronize the output file schema with the input file
schema. The Sync function only displays once the Row connection is linked with the output
component. | | Generated image path | Name and path of the output image file. | | Chart title | Enter the title of the line chart to be generated. | | Domain axis label and Range axis
label | Enter the domain axis (X axis) and range axis (Y axis)
labels. | | Plot orientation | Select the plot orientation of the range axis: Vertical or Horizontal. | | Include legend | Select this check box if you want your line chart to include a
legend, indicating the lines of different series in different
colors. | | Image width and Image
height | Enter the width and height of the image, in pixels. | | Moving average | Select this check box to show a moving average for each series on
your line chart. With this check box selected, the Period field appears, letting you define
a period of which you want to show the moving average. | | Lower bound and Upper
bound | Define the lowest and highest values to be displayed on the range
axis. | | Chart background and Plot
background | Select the chart background color and the plot area background
color. | ## Advanced settings | Properties | Description | | --- | --- | | tStat
Catcher Statistics | Select this check box to collect log data at the component
level. | | Enable parallel execution | Select this check box to perform high-speed data processing, by treating
multiple data flows simultaneously. Note that this feature depends on the database or
the application ability to handle multiple inserts in parallel as well as the number of
CPU affected. In the Number of parallel executions
field, either:

Enter the number of parallel executions desired.
Press Ctrl+Space and select the appropriate context variable from the list. For further information about context variables, see Using contexts and variables.

The Action on table field is not available with the parallelization function. Therefore, you must use a tCreateTable component if you want to create a table.
When parallel execution is enabled, it is not possible to use global variables to retrieve return values in a subJob.

| ## Global Variables | Variables | Description | | --- | --- | | Global Variables | NB\_LINE: the number
of rows read by an input component or transferred to an output component. This is an
After variable and it returns an integer.

ERROR\_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error checkbox is
cleared, if the component has this checkbox.

A Flow variable functions during the execution of a component
while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl+Space to access the variable list and choose the variable to use from
it.

For more information about variables, see [Using contexts and variables](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). | ## Usage | Usage guidance | Description | | --- | --- | | **Usage rule** | This component is mainly used as Output component. It requires an
Input component and Row main link
as input. | **Related concepts** * [Creating a line chart to ease trend analysis](https://help.qlik.com/talend/en-US/components/8.0/chart/tlinechart-tmap-tfileinputdelimited-tfiledelete-creating-line-chart-to-ease-trend-analysis-standard-component-this)