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tutorial:incorporating_iterations_into_a_model [2013/09/03 18:41] admin |
tutorial:incorporating_iterations_into_a_model [2017/01/25 17:56] (current) francisco [What will you learn?] |
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Now assign a number to each //[[:Number Map]]// and then connect //[[:Load Map]]// and //[[:Load Categorical Map]]// to them.{{ :tutorial:inc._it._model_2.jpg |}} | Now assign a number to each //[[:Number Map]]// and then connect //[[:Load Map]]// and //[[:Load Categorical Map]]// to them.{{ :tutorial:inc._it._model_2.jpg |}} | ||
- | Load ''amazon_states.tif'' using the //[[:Load Categorical Map]]// and "Brazilian_amazon_landscape.tif" with //[[:Load Map]]//. Add a //[[:Number Value]]// from Map Algebra Supplementary tab inside the //[[:Calculate Map]]//, assign "1" to it and write the following equation: \\ | + | Load ''amazon_states.tif'' using the //[[:Load Categorical Map]]// and "Brazilian_amazon_landscape.tif" with //[[:Load Map]]//. Add a //[[:Number Value]]// from hook tool in the //[[:Calculate Map]]//, assign "1" to it and write the following equation: \\ |
\\ **if i1 = v1 and i2 = 2 then 1 else null** | \\ **if i1 = v1 and i2 = 2 then 1 else null** | ||
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{{ :tutorial:inc._it._model_4.jpg|}}Grab the container //[[:Repeat]]// from the Control tab and place it on the sketch. Drag //[[:Calculate Map]]// into it. It will automatically resize to envelop //[[:Calculate Map]]//. Then add the functor //[[:Step]]// into //[[:Repeat]]//. Open //[[:Calculate Map]]// by clicking on its top left icon and connect //[[:Step]]// to **Value** port of //[[:Number Value]]//. | {{ :tutorial:inc._it._model_4.jpg|}}Grab the container //[[:Repeat]]// from the Control tab and place it on the sketch. Drag //[[:Calculate Map]]// into it. It will automatically resize to envelop //[[:Calculate Map]]//. Then add the functor //[[:Step]]// into //[[:Repeat]]//. Open //[[:Calculate Map]]// by clicking on its top left icon and connect //[[:Step]]// to **Value** port of //[[:Number Value]]//. | ||
- | Open //[[:Repeat]]// with the Edit Functor tool and insert "9".{{:tutorial:inc._it._model_5.jpg?300 |}} | + | Open //[[:Repeat]]// with the Edit Functor tool and insert "9". |
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+ | {{:tutorial:inc._it._model_5.jpg?300 |}} | ||
\\ | \\ | ||
\\ | \\ | ||
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Now you need to sum all cells that represent forest. Note that the output is a binary map with only ones and nulls, the latter is represented by zero. Next, use //[[:Extract Map Attributes]]// (Map Algebra tab) to extract the sum of non-null cells. This functor produces as output a table with [[:extract_map_attributes#Notes|these map attributes]].{{ :tutorial:inc._it._model_6.jpg |}} | Now you need to sum all cells that represent forest. Note that the output is a binary map with only ones and nulls, the latter is represented by zero. Next, use //[[:Extract Map Attributes]]// (Map Algebra tab) to extract the sum of non-null cells. This functor produces as output a table with [[:extract_map_attributes#Notes|these map attributes]].{{ :tutorial:inc._it._model_6.jpg |}} | ||
- | The area extent is the sum of non-null cells (field 9) multiplied by the cell area in hectares (field 7). You need to add one //[[:Calculate Value]]//, located in the Lookup Table tab, to perform this calculation. Also, drag one //[[:Number Table]]// into it (from Map Algebra Supplementary tab), which will receive the attribute table output from //[[:Extract Map Attributes]]//. You need to enter "1" to assign an identifier for this table. Finally, write:\\ **t1[7]*t1[9]**\\ (cell area (in hectares) * sum of the values (excluding null cells)) | + | The area extent is the sum of non-null cells (field 9) multiplied by the cell area in hectares (field 7). You need to add one //[[:Calculate Value]]//, located in the Table tab, to perform this calculation. Also, select one //[[:Number Table]]// clicking in Create a hook (magnet icon) inside functor action bar, which will receive the attribute table output from //[[:Extract Map Attributes]]//. You need to enter "1" to assign an identifier for this table. Finally, write:\\ **t1[7]*t1[9]**\\ (cell area (in hectares) * sum of the values (excluding null cells)) |
<note tip>**TIP**: You can replace the\\ | <note tip>**TIP**: You can replace the\\ | ||
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Now you need to fill in a table in order to store the area calculated for each state. The functor [[:set_lookup_table_value|Set Lookup Table Value]] updates a lookup table placing a value to a position defined by a key. To fill in the entire lookup table, you need to develop a loop that enables this functor to browse through the lookup table. To close this loop, you will need a functor that is key to the development of dynamic models. Here we introduce the concept of Mux functor. | Now you need to fill in a table in order to store the area calculated for each state. The functor [[:set_lookup_table_value|Set Lookup Table Value]] updates a lookup table placing a value to a position defined by a key. To fill in the entire lookup table, you need to develop a loop that enables this functor to browse through the lookup table. To close this loop, you will need a functor that is key to the development of dynamic models. Here we introduce the concept of Mux functor. | ||
- | A //Mux// functor can be a map, a categorical map, a lookup table, a table or a value. Look at the Control tab to find //[[:Mux Lookup Table]]// and drag it into //[[:Repeat]]//. Also drag //[[:Set Lookup Table Value]]// from the Table tab. | + | A //Mux// functor can be a map, a categorical map, a lookup table, a table or a value. Look at the Control tab to find //[[:Mux Lookup Table]]// and drag it into //[[:Repeat]]//. Also drag //[[:Set Lookup Table Value]]// from the Lookup Table tab. |
{{ :tutorial:inc._it._model_9.jpg |}} | {{ :tutorial:inc._it._model_9.jpg |}} | ||
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This functor receives a table that will be updated with a value placed in a position defined by a key. So you need to connect table output from the functor //[[:Mux Lookup table]]// to the input port of //[[:Set Lookup Table Value]]//. | This functor receives a table that will be updated with a value placed in a position defined by a key. So you need to connect table output from the functor //[[:Mux Lookup table]]// to the input port of //[[:Set Lookup Table Value]]//. | ||
- | {{ :tutorial:inc._it._model_10.jpg |}} | ||
Again, let’s connect the output from //[[:Set Lookup Table Value]]// to //[[:Mux Lookup Table]]//. When a connection has two or more options, the Edit Functor Ports window opens automatically. You have to choose the port **Feedback**. | Again, let’s connect the output from //[[:Set Lookup Table Value]]// to //[[:Mux Lookup Table]]//. When a connection has two or more options, the Edit Functor Ports window opens automatically. You have to choose the port **Feedback**. | ||
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\\ | \\ | ||
\\ | \\ | ||
- | Still, you need to connect the output from //[[:Calculate Value]]// to the **input** port of //[[:Set Lookup Table Value]]//. The Edit Functor Ports window pops up because there are two options. Connect the arrow to the port **Value**; the **key** comes from the current model step via the connection of //[[:Step]]// to //[[:Set Lookup Table Value]]//.{{:tutorial:inc._it._model_13.jpg|}} | + | Still, you need to connect the output from //[[:Calculate Value]]// to the **input** port of //[[:Set Lookup Table Value]]//. \\ |
- | {{ :tutorial:inc._it._model_14.jpg|}}\\\ | + | {{:tutorial:inc._it._model_13.jpg|}}\\ |
+ | The Edit Functor Ports window pops up because there are two options. Connect the arrow to the port **Value**; the **key** comes from the current model step via the connection of //[[:Step]]// to //[[:Set Lookup Table Value]]//. | ||
+ | {{ :tutorial:inc._it._model_14.jpg|}} | ||
\\ | \\ | ||
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\\ | \\ | ||
\\ | \\ | ||
+ | \\ | ||
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+ | \\ | ||
+ | \\ | ||
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Click on the layout tool Left to Right and your model will look like the one below.\\ | Click on the layout tool Left to Right and your model will look like the one below.\\ | ||
\\ | \\ | ||
+ | |||
{{ :tutorial:inc._it._model_15.jpg |}} | {{ :tutorial:inc._it._model_15.jpg |}} | ||
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<note tip>**TIP**: If //[[:Save Map]]// is placed inside //[[:Repeat]]//, it will save a file per time step and a digit representing the time step will be added to the end of the file name.</note> | <note tip>**TIP**: If //[[:Save Map]]// is placed inside //[[:Repeat]]//, it will save a file per time step and a digit representing the time step will be added to the end of the file name.</note> | ||
- | At a last step, open //[[:Set Lookup Table Value]]// with the Edit Functor Ports. Click on **Updated Table** with the right button and turn on Register viewer{{ :tutorial:inc._it._model_16.jpg |}} | + | {{ :tutorial:inc._it._model_16.jpg |}} |
- | Test the model integrity, save it and if everything is O.K., click on the run button. This may take a short while. | + | Save it and if everything is O.K., click on the run button. This may take a short while. |
{{ :tutorial:inc._it._model_17.jpg |}} | {{ :tutorial:inc._it._model_17.jpg |}} | ||
- | Go to //[[:Set Lookup Table Value]]//, open it with Edit Functor Ports and click with the right button on **Updated Table** to view the result. Also make a chart clicking on the chart button (bottom left). | + | Go to //[[:Set Lookup Table Value]]//, open inspect functor into functor action bar and click to inspect the output port **Updated Table** and run the model again to view the result. Also make a chart clicking on the chart button (bottom left). |
- | {{:tutorial:inc._it._model_19.jpg|}} {{:tutorial:inc._it._model_19_2.jpg|}} | + | {{:tutorial:inc._it._model_19.jpg|}}{{:tutorial:inc._it._model_19_2.jpg|}} |
These are the areal extents of the remaining Amazon forest in hectares per state. | These are the areal extents of the remaining Amazon forest in hectares per state. | ||
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__You have successfully completed the two introductory lessons__. Another way to solve the query of this lesson is through the use of a subset of Region functors. This will be the topic of the next lesson. | __You have successfully completed the two introductory lessons__. Another way to solve the query of this lesson is through the use of a subset of Region functors. This will be the topic of the next lesson. | ||
- | [[tutorial:using_the_concept_of_region| Next Lesson]] | + | [[tutorial:using_the_concept_of_region|Next lesson]] |