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====== PDF editing tool ======

The pdf tool appears when a table cell is clicked that contains a [[PDF|PDF]]. It can be hidden by clicking the **Toggle** button, as shown in the screen shot below.

{{:pdf_editing_tool.png|Screenshot}}
===== Assigning PDF's =====

Choose a probability density function from the **Distribution functions** drop-down list. Input fields will appear depending on the number of arguments required for the selected function.

The **Upper trunc** and **Lower trunc** fields are always available and can be used to truncate the function.

See [[Probability_density_function|probability density functions]] for a list of all PDFs.

===== Tools =====

The editor contains several tools. By using the buttons in the toolbar you can select which tool to show.

====  Chart ====

The chart tool displays a graph of the current function. By using the buttons on the left hand side you can choose to plot

  * The PDF (Probability density function)
  * The CDF (Cumulative distribution function)
  * The survival function
  * The hazard function
  * The cumulative hazard function

Delimitors and calculated values from the **Calculation** tool are displayed in the graph using markers.

====  Properties ====

Displays statistics on the currently selected function.

====  Calculation ====

Allows you to calculate values and percentiles for the current function. These values are marked in the graph of the **Chart** tool.

====  Information ====

Describes the currently selected function and it’s parameters.

===== See also =====

  * [[Probability_density_function|Probability density function]]
  * [[Parameter|Parameter]]
  * [[Probabilistic_simulation|Probabilistic simulation]]
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