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parameters_screen [2015/03/09 16:01]
erik
parameters_screen [2015/03/09 15:02] (current)
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 ====Introduction==== ====Introduction====
  
-[[Time series]] are used for temporal measurements and data such as wind speeds, precipitation,​ concentrations in water etcThe data you need to provide ​for your study depends on which [[sub-system|sub-systems]] you have selected for your model+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==== ====Tool bar====
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 | {{ help24.png }}| Help | Shows this page | | {{ help24.png }}| Help | Shows this page |
  
-====Entering ​time series====+====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 <​sup>​1)</​sup>​** - 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 <​sup>​1)</​sup>​** - 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 <​sup>​1)</​sup>​** - Can be used as a parameter for some PDFs (eg. the normal distribution).  
 + 
 +  * **Arithmetic Std. Dev <​sup>​1)</​sup>​** - Arithmetic standard deviation. Can be used as a parameter for some PDFs (eg. the normal distribution).  
 + 
 +  * **Geometric Mean <​sup>​1)</​sup>​** - Can be used as a parameter for some PDFs (eg. the log normal distribution). 
 + 
 +  * **Geometric Std. Dev. <​sup>​1)</​sup>​** - Geometric standard deviation. Can be used as a parameter for some PDFs (eg. the log normal distribution). 
 +  
 +  * **Median <​sup>​1)</​sup>​** - The 50% percentile. 
 + 
 +  * **Mode <​sup>​1)</​sup>​** - The most likely value. Can be used as a parameter for some PDFs (eg. the triangular distribution). 
 + 
 +  * **N <​sup>​1)</​sup>​** - Number of samples. 
 + 
 +  * **% Lower <​sup>​1)</​sup>​** - The percentage of values below the lower percentile.Can be used for the lognormal distribution. 
 + 
 +  * **% Upper <​sup>​1)</​sup>​** - The percentage of values above the lower percentile. Can be used for the lognormal distribution. 
 + 
 +  * **Lower Percentile <​sup>​1)</​sup>​** - The lower percentile. Can be used for the lognormal distribution. 
 + 
 +  * **Upper Percentile <​sup>​1)</​sup>​** - The upper percentile. Can be used for the lognormal distribution. 
 + 
 +  * **Author <​sup>​1)</​sup>​** - The person who entered the data. 
 + 
 +  * **Reference <​sup>​1)</​sup>​** - The reference for the data of this parameter. 
 + 
 +  * **Comment <​sup>​1)</​sup>​** - A comment regarding the data of this parameter. 
 + 
 +  * **Linked <​sup>​1)</​sup>​** - If this parameter is linked to a simulation result. 
 + 
 +  * **Link <​sup>​1)</​sup>​** - The link between this parameter and a simulation result.  
 + 
 +<​sup>​1)</​sup>​ - 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 time series are listed on the left hand side of the screen. When you select a time series in the list, the table on the right displays its data. +The editor contains two tools:
  
-Time series begin at 0 and use time unit of days+**Keypad** - Use the keypad with the mouse to enter value or an operator without having to use the keyboard.
  
-Below the table is a graph showing you the data you have entered. The time axis starts at the simulation start time and ends at the simulation end time. You can hide the plot by clicking the {{editor16.png}}**Toggle** button.+**Unit conversion** - This tool lets you convert a numerical value from one unit to another (compatible) unit.
  
-**Note** - The table shows data for one [[dependency]] at a time. For a time series dependent on contaminants,​ a drop-down list above the table will let you choose which contaminant to enter values for. Use the [[default]] item in the drop down list if you want to assign the same values for all contaminants+  ​* **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.
  
-====Importing and exporting====+==PDF Editor==
  
-{{ ::time_series_paste.png?nolink|}} For long time series you might consider [[importing and exporting data|importing data from Excel]] by using the toolbar button. You can also copy-paste data from Excel (or some another spreadsheet). Copy the data, then right-click the upper left cell in the table and choose ​**Paste** from the menu+{{ ::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.
  
-====Clearing data====+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.
  
-To remove ​all data +See [[http://​ecolego.facilia.se/​ecolego/​show/​Probability+density+function|probability density functions]] for a list of all PDFs.
  
-  - Click a cell in the table.  +The PDF Editor has four tools, which are accessed through ​the buttons next to the **Editor** button
-  - Press CTRL+A ​to select all cells. +
-  - Press the DELETE key. +
-   +
-====Interpolation====+
  
-You can select how data is retrieved from the table during calculations by using the **Interpolation** drop down list:+{{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
  
-  * **Interpolation-Extrapolation** – Values between the specified time-points are linearly interpolated. Values before the first time point and after the last time-point will be extrapolated. ​ +  * The PDF (Probability density function) 
-  * **Interpolation-Use end values** – Values between the specified time-points are linearly interpolated. ​The value for the first time point will be used when time is less than the first time point. The value for the last time point will be used when time is larger than the last time point. +  * The CDF (Cumulative distribution function) 
-  * **Use input nearest** – For each simulation time point the value for the nearest specified time is used. +  * The survival function 
-  * **Use input below** – For each simulation time point the value for the nearest of the lower specified time points is used. If none of the specified time points is lower, then the nearest of all specified time points is used.  +  * The hazard function 
-  * **Use input above** – For each simulation time point the value for the nearest of the higher specified time points is used. If none of the specified time points is higher, then the nearest of all specified time points is used. +  * The cumulative hazard function
  
-The **Editor** will adjust to show how values are going to be used during ​the simulation.+Delimiters and calculated ​values ​from the {{calculatortool16.png}} calculation tool are displayed in the graph using markers.
  
-====Cyclic data====+{{propertiestool16.png}} Displays statistics on the currently selected function.
  
-For repeating data you can select ​the **Cyclic** buttonThe time series will then be "​looped"​ and all values ​repeated+{{calculatortool16.png}} Allows ​you to calculate values and percentiles for the current functionThese values ​are marked in the graph of the Chart tool. 
 + ​Information
  
-**Note** - For cyclic data, you must ensure that the first value you give is the same as the last valueAlso remember to include ​the whole range; if you want a table to repeat a one year cycle the first data point should be for day 0 and the last for day 365.+{{informationtool16.png}} Describes ​the currently selected function ​and it’s parameters.
  
 ====See also==== ====See also====
  
-  * [[Time series]]+  * [[Parameter]] 
 +  * [[Performing an uncertainty analysis]]
   * [[User interface]]   * [[User interface]]
  
parameters_screen.txt · Last modified: 2015/03/09 15:02 (external edit)