====Introduction==== This screen lists all [[parameter|parameters]] that can be changed by the user. For a normal [[deterministic simulation]], you need to enter a nominal value for each parameter. For a [[probabilistic simulation]], you need also to assign [[PDF|probability density functions]] to the uncertain parameters that you wish to include in the analysis. ====Tool bar==== | {{ export24.png }}| Export to Excel | See [[importing and exporting data]] | | {{ import24.png }}| Import from Excel | See [[importing and exporting data]] | | {{ help24.png }}| Help | Shows this page | ====Entering parameter data==== Select a parameter in the list to edit its data. A short presentation of the parameter is displayed on the right hand side. Under, in the **Data** section, a table with the data for the parameter is displayed. When you click a cell in the table an [[#editor]] will appear under the table which can assist you in setting a value for the parameter. ===Data=== * **Value** - This is where the nominal (deterministic) value of the parameter is defined. * **PDF** - The [[PDF|probability density function]] defines the uncertainty distribution. It is recommended that you use the [[#Editor]], which is displayed as you click a PDF field, to set probability density functions. * **Unit** - The unit serves only as a comment. * **Min value 1)** - The minimum value. Is used by some sentitivity analysis methods, and can be used as a parameter for some PDFs (eg. the uniform distribution). * **Max value 1)** - The maximum value. Is used by some sentitivity analysis methods, and can be used as a parameter for some PDFs (eg. the uniform distribution). * **Arithmetic Mean 1)** - Can be used as a parameter for some PDFs (eg. the normal distribution). * **Arithmetic Std. Dev 1)** - Arithmetic standard deviation. Can be used as a parameter for some PDFs (eg. the normal distribution). * **Geometric Mean 1)** - Can be used as a parameter for some PDFs (eg. the log normal distribution). * **Geometric Std. Dev. 1)** - Geometric standard deviation. Can be used as a parameter for some PDFs (eg. the log normal distribution). * **Median 1)** - The 50% percentile. * **Mode 1)** - The most likely value. Can be used as a parameter for some PDFs (eg. the triangular distribution). * **N 1)** - Number of samples. * **% Lower 1)** - The percentage of values below the lower percentile.Can be used for the lognormal distribution. * **% Upper 1)** - The percentage of values above the lower percentile. Can be used for the lognormal distribution. * **Lower Percentile 1)** - The lower percentile. Can be used for the lognormal distribution. * **Upper Percentile 1)** - The upper percentile. Can be used for the lognormal distribution. * **Author 1)** - The person who entered the data. * **Reference 1)** - The reference for the data of this parameter. * **Comment 1)** - A comment regarding the data of this parameter. * **Linked 1)** - If this parameter is linked to a simulation result. * **Link 1)** - The link between this parameter and a simulation result. 1) - Click the {{showmoreheaders16.png}} button to display this header. Below the table are four buttons: | {{TransposeTable10.png}} | Transpose the table (switch rows for columns). Only available for objects with one or more dimensions. | | {{hidedefaults16.png}} | Hide [[default]] rows/columns.| | {{hideindices16.png}} | Hide the non-default rows/columns.| | {{showmoreheaders16.png}} | Show (or hide) more headers. Some headers are originally hidden, such as headers for comments and statistics | ===Editor=== The editor appears when you click in a field in the table. When you click a field for a numeric value, an editor which can help you convert values from one unit to another. When you click a PDF the PDF editor appears. You can hide the editor by clicking the {{editor16.png}}**Toggle** button. ==Number editor== {{ ::parameter_screen_number_editor.png?direct&200|}} The constants editing tool appears when a table cell is clicked that contains a number. It can be hidden by clicking the Toggle button, as shown in the screen shot below. The editor contains two tools: **Keypad** - Use the keypad with the mouse to enter a value or an operator without having to use the keyboard. **Unit conversion** - This tool lets you convert a numerical value from one unit to another (compatible) unit. * **From** - The original unit * **Value** - The original value * **To** - The target unit * **Result** - The converted value * **Apply** - Copies the results into the selected cell in the table. ==PDF Editor== {{ ::parameter_screen_pdf_editor.png?direct&200|}} 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. **Lower trunc** is often used to avoid negative values for parameters. See [[https://userguide.intelligentscenariomodelling.com/doku.php?id=probability_density_function|probability density functions]] for a list of all PDFs. The PDF Editor has four tools, which are accessed through the buttons next to the **Editor** button. {{charttool16.png}} 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 Delimiters and calculated values from the {{calculatortool16.png}} calculation tool are displayed in the graph using markers. {{propertiestool16.png}} Displays statistics on the currently selected function. {{calculatortool16.png}} Allows you to calculate values and percentiles for the current function. These values are marked in the graph of the Chart tool. Information {{informationtool16.png}} Describes the currently selected function and it’s parameters. ====See also==== * [[Parameter]] * [[Performing an uncertainty analysis]] * [[User interface]]