Difference between revisions of "ASCEND/C2/Iterative-calculations-and-Plotting-Graphs/English"
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| style="border:0.75pt solid #000001;padding:0.0104in;"| In this tutorial, | | style="border:0.75pt solid #000001;padding:0.0104in;"| In this tutorial, | ||
− | We will learn | + | We will learn |
− | * | + | * how to use '''FOR''' loop in '''ASCEND''' |
− | * | + | * how to use '''Arrays''' in our '''MODEL''' |
− | * | + | * and how to plot Graphs using '''ASCEND''' |
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| style="border:0.75pt solid #000001;padding:0.0104in;"| Here I am using | | style="border:0.75pt solid #000001;padding:0.0104in;"| Here I am using | ||
− | '''Ubuntu Linux OS | + | '''Ubuntu Linux OS version 12.04''' |
− | '''ASCEND | + | '''ASCEND version 0.9.8''' |
|- | |- | ||
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To know more about '''ASCEND,''' please visit '''ascend4.org''' | To know more about '''ASCEND,''' please visit '''ascend4.org''' | ||
− | |||
− | |||
|- | |- | ||
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Problem Statement | Problem Statement | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| This is the problem statement for this tutorial. |
− | Suppose we want to study the variation in '''mass''' of a '''thin walled cylindrical vessel''' with respect to its ''' | + | Suppose we want to study the variation in '''mass''' of a '''thin walled cylindrical vessel''' with respect to its '''Height to Diameter ratio''' |
− | + | i.e. '''H''' to '''D''' ratio. | |
− | The | + | The equation describing our system is the mass of the metal: |
− | '''metal mass = | + | '''metal mass = density of the metal into volume of the wall''' |
|- | |- | ||
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| style="border:0.75pt solid #000001;padding:0.0104in;"| We have two '''models''' in our file. | | style="border:0.75pt solid #000001;padding:0.0104in;"| We have two '''models''' in our file. | ||
− | The first | + | The first '''model''' defines parameters that will be passed into second model. |
− | To know more on writing reusable '''models''' refer to | + | To know more on writing reusable '''models''' refer to other lectures in this series. |
|- | |- | ||
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|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Zoom in on the second MODEL vesselplot. | | style="border:0.75pt solid #000001;padding:0.0104in;"| Zoom in on the second MODEL vesselplot. | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Now we write our second '''MODEL''' ''' | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Now we write our second '''MODEL vesselplot'''. This '''model''' uses the previously defined '''parameters'''. |
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the declaration of n_entries | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the declaration of n_entries | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| We define the total number of '''data points''' that we want, by defining '''variable | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| We define the total number of '''data points''' that we want, by defining '''variable n_entries''' |
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the declaration of H_to_D_ratio and metal_mass | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the declaration of H_to_D_ratio and metal_mass | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Therafter, we declare two '''arrays H_to_D_ratio''' and '''metal_mass''' | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Therafter, we declare two '''arrays H_to_D_ratio''' and '''metal_mass'''. |
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the FOR loop | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the FOR loop | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Now,we start a '''FOR''' loop, using which we pass the '''parameters''' of previous model in a new''' array v'''. | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Now,we start a '''FOR''' loop, using which, we pass the '''parameters''' of previous '''model''' in a new''' array v'''. |
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the FOR loop in METHOD values | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight the FOR loop in METHOD values | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Note that,we assign values to the previously defined '''array H_to_D_ratio '''under '''METHOD | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Note that,we assign values to the previously defined '''array H_to_D_ratio '''under '''METHOD values'''. |
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Open up ASCEND interface.Load the program and run it. | | style="border:0.75pt solid #000001;padding:0.0104in;"| Open up ASCEND interface.Load the program and run it. | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Before moving any further, let' | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Before moving any further, let us load the '''ASCEND''' interface and then run our program. |
+ | |||
+ | |- | ||
+ | | style="border:0.75pt solid #000001;padding:0.0104in;"| On the ASCEND interface. | ||
+ | | style="border:0.75pt solid #000001;padding:0.0104in;"| Let me open our file which is of the name '''vesselplot'''. | ||
+ | |||
+ | Let me load the '''model.''' | ||
+ | |||
+ | |- | ||
+ | | style="border:0.75pt solid #000001;padding:0.0104in;"| On the ASCEND interface. | ||
+ | | style="border:0.75pt solid #000001;padding:0.0104in;"| Let me run the '''values METHOD''' and solve it. | ||
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Point to the type 'array' displayed on interface | | style="border:0.75pt solid #000001;padding:0.0104in;"| Point to the type 'array' displayed on interface | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| As you can see, '''ASCEND''' clearly indicates that '''H_to_D_ratio | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| As you can see, '''ASCEND''' clearly indicates that '''H_to_D_ratio''' and '''metal_mass ''' are of the type '''arrays'''. |
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Click on 'H_to_D_ratio' arrow | | style="border:0.75pt solid #000001;padding:0.0104in;"| Click on 'H_to_D_ratio' arrow | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| To see different values stored in the '''array''', we just click on the drop down menu. | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| To see the different values stored in the '''array''', we just click on the drop down menu. |
+ | |||
+ | |||
+ | This shows all the values stored in the array '''H to D ratio'''. | ||
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Click on 'v' arrow | | style="border:0.75pt solid #000001;padding:0.0104in;"| Click on 'v' arrow | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Also, to see the values of the parameters passed to '''array v''', we click on the arrow next to it. | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Also, to see the values of the various parameters passed to '''array v''', we first click on the arrow next to it. |
+ | |||
+ | |||
+ | Then we can click on the arrow next to any of these numbers to see the required values. | ||
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Source code in Text editor | | style="border:0.75pt solid #000001;padding:0.0104in;"| Source code in Text editor | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Now, let's | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Now, let's see how to plot graphs using '''ASCEND'''. |
+ | |||
+ | |||
+ | |||
+ | Let me minimize this window and open the source code. | ||
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight REQUIRE "plot.a4l” | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight REQUIRE "plot.a4l” | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Firstly, we need to include | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Firstly, we need to include a new library in our '''MODEL''''. |
+ | |||
+ | The name of the library is '''plot.a4l''' | ||
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight massVSratio IS_A plt_plot_symbol | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight massVSratio IS_A plt_plot_symbol | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| To plot a graph in '''ASCEND''', we need to declare a '''variable''' of the type''' plt_plot_symbol'''. | | style="border:0.75pt solid #000001;padding:0.0104in;"| To plot a graph in '''ASCEND''', we need to declare a '''variable''' of the type''' plt_plot_symbol'''. | ||
+ | |||
+ | Here we define '''mass v/s ratio''' as a variable of this type. | ||
|- | |- | ||
| style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight (CurveSet, Curves) | | style="border:0.75pt solid #000001;padding:0.0104in;"| Highlight (CurveSet, Curves) | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| This declaration requires two '''parameters''' namely '''Curveset''' and '''Curves'''. | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| This declaration requires two '''parameters''' namely, '''Curveset''' and '''Curves'''. |
|- | |- | ||
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| style="border:0.75pt solid #000001;padding:0.0104in;"| The second parameter '''Curves''' requires 3 '''parameters-''' | | style="border:0.75pt solid #000001;padding:0.0104in;"| The second parameter '''Curves''' requires 3 '''parameters-''' | ||
− | # a set of '''integers''' | + | # a set of '''integers''' |
− | # two lists of data giving the '''y-values''' and the '''x-values''' for the curve. | + | # two lists of data giving the '''y-values''' and |
+ | # the '''x-values''' for the curve. | ||
− | In our case, this set of '''integers''' is from | + | In our case, this set of '''integers''' is from 1 to 20. |
− | And the ''' | + | And the two '''arrays''' – '''metal_mass '''& '''H_to_D_ratio''' gives the '''y values''' and '''x values''' respectiveley. |
|- | |- | ||
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− | + | Let us go back to the '''ASCEND''' interface. | |
|- | |- | ||
| style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Right-click on massVSratio and choose the plot option | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Right-click on massVSratio and choose the plot option | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Let us go to the variable '''mass vs ratio'''. |
+ | |||
+ | |||
+ | Right-click on it and select the option '''plot'''. | ||
|- | |- | ||
| style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Maximise the plot window | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Maximise the plot window | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| This gives us the required plot, with the title and the labels that we mentioned in the code. | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| This gives us the required plot, with the title and the labels that we had mentioned in the code. |
|- | |- | ||
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|- | |- | ||
| style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Remove the massVSratio.tittle line from the source code and save it. | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Remove the massVSratio.tittle line from the source code and save it. | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| We remove the '''title | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| We remove the line that defines the '''title '''for our plot. |
|- | |- | ||
| style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Open up ASCEND interface.Load the program and run it. | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Open up ASCEND interface.Load the program and run it. | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Let me save the file and reload it in the '''ASCEND''' interface. |
+ | |||
+ | Let me again solve it and plot the graph again. | ||
|- | |- | ||
| style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Maximise the plot window | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Maximise the plot window | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| We can clearly see that '''ASCEND''' titles the plot as '''' | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| We can clearly see that '''ASCEND''' titles the plot as ''''Undefined''''. |
|- | |- | ||
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Summary | Summary | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| This brings us to the end of this tutorial | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| This brings us to the end of this tutorial. |
|- | |- | ||
| style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Click to bring up the bullets | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| Click to bring up the bullets | ||
− | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| In this tutorial, we have learnt | + | | style="border-top:none;border-bottom:0.75pt solid #000001;border-left:0.75pt solid #000001;border-right:0.75pt solid #000001;padding:0.0104in;"| In this tutorial, we have learnt |
− | + | ||
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− | + | ||
+ | * How to use '''FOR''' loop in '''ASCEND''' | ||
+ | * How to use '''Arrays''' in our '''MODEL''' | ||
+ | * How to plot Graphs in '''ASCEND''' | ||
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Assignment | Assignment | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| As an assignment, change the size of array to 40 | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| As an assignment to this tutorial, change the size of array to 40. |
+ | |||
+ | |||
+ | And re-attempt this problem covered in this tutorial. | ||
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About slide | About slide | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Information on the Spoken Tutorial project is available on the Internet. |
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About slide | About slide | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Workshops based on Spoken Tutorials are also available. |
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Acknowledgment | Acknowledgment | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| Spoken Tutorial Project is | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| Spoken Tutorial Project is funded by the NMEICT, MHRD. |
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Thank you slide | Thank you slide | ||
− | | style="border:0.75pt solid #000001;padding:0.0104in;"| This is Tarun Gangwar from IIT Bombay signing off. Thank you | + | | style="border:0.75pt solid #000001;padding:0.0104in;"| This is Tarun Gangwar from IIT Bombay signing off. Thank you. |
|} | |} |
Latest revision as of 11:51, 19 August 2014
Tutorial 6: Iteration & Graph Plotting
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|
Slide number 1
Title slide |
Welcome to the tutorial on Iteration & Graph Plotting in ASCEND |
Show Slide 2 | In this tutorial,
We will learn
|
Slide number 3
System Requirement |
Here I am using
Ubuntu Linux OS version 12.04 ASCEND version 0.9.8 |
Slide number 4
Pre-requisites |
To follow this tutorial, user must have basic knowledge of Linux and ASCEND.
|
Slide number 5
Problem Statement |
This is the problem statement for this tutorial.
i.e. H to D ratio. The equation describing our system is the mass of the metal: metal mass = density of the metal into volume of the wall |
Source Code in Text Editor | Let's look at the source code for this problem. |
Zoom in on the MODEL vessel and paremeters part of the code. | We have two models in our file.
The first model defines parameters that will be passed into second model.
|
Zoom out and show the entire MODEL vessel | After defining the parameters, we define the required variables and equations.
|
Zoom in on the second MODEL vesselplot. | Now we write our second MODEL vesselplot. This model uses the previously defined parameters. |
Highlight the declaration of n_entries | We define the total number of data points that we want, by defining variable n_entries |
Highlight the declaration of H_to_D_ratio and metal_mass | Therafter, we declare two arrays H_to_D_ratio and metal_mass. |
Highlight the FOR loop | Now,we start a FOR loop, using which, we pass the parameters of previous model in a new array v. |
Highlight the FOR loop in METHOD values | Note that,we assign values to the previously defined array H_to_D_ratio under METHOD values. |
Open up ASCEND interface.Load the program and run it. | Before moving any further, let us load the ASCEND interface and then run our program. |
On the ASCEND interface. | Let me open our file which is of the name vesselplot.
Let me load the model. |
On the ASCEND interface. | Let me run the values METHOD and solve it. |
Point to the type 'array' displayed on interface | As you can see, ASCEND clearly indicates that H_to_D_ratio and metal_mass are of the type arrays. |
Click on 'H_to_D_ratio' arrow | To see the different values stored in the array, we just click on the drop down menu.
|
Click on 'v' arrow | Also, to see the values of the various parameters passed to array v, we first click on the arrow next to it.
|
Source code in Text editor | Now, let's see how to plot graphs using ASCEND.
Let me minimize this window and open the source code. |
Highlight REQUIRE "plot.a4l” | Firstly, we need to include a new library in our MODEL'.
The name of the library is plot.a4l |
Highlight massVSratio IS_A plt_plot_symbol | To plot a graph in ASCEND, we need to declare a variable of the type plt_plot_symbol.
Here we define mass v/s ratio as a variable of this type. |
Highlight (CurveSet, Curves) | This declaration requires two parameters namely, Curveset and Curves. |
Highlight the following lines:
CurveSet IS_A set OF symbol_constant; CurveSet :== ['test']; |
Curveset allows us to tag and identify each of the curves we plot. |
Highlight the following lines:
Curves['test'] IS_A plt_curve([1..n_entries], metal_mass,H_to_D_ratio) |
The second parameter Curves requires 3 parameters-
In our case, this set of integers is from 1 to 20.
|
Highlight the following lines:
massVSratio.title :='Metal mass of the walls vs H to D ratio for a thin-walled cylindrical vessel'; massVSratio.XLabel := 'H to D ratio'; massVSratio.YLabel := 'metal mass IN kg/m^3 |
We give title and label for our plot under the METHODS section. |
Open up ASCEND interface.Load the program and run it. | Let us now see how to get the required plot.
|
Right-click on massVSratio and choose the plot option | Let us go to the variable mass vs ratio.
|
Maximise the plot window | This gives us the required plot, with the title and the labels that we had mentioned in the code. |
Source code in Text editor | Let us now see what happens if we don't mention the plot title. |
Remove the massVSratio.tittle line from the source code and save it. | We remove the line that defines the title for our plot. |
Open up ASCEND interface.Load the program and run it. | Let me save the file and reload it in the ASCEND interface.
Let me again solve it and plot the graph again. |
Maximise the plot window | We can clearly see that ASCEND titles the plot as 'Undefined'. |
Slide number 6
Summary |
This brings us to the end of this tutorial. |
Click to bring up the bullets | In this tutorial, we have learnt
|
Slide Number 7
Assignment |
As an assignment to this tutorial, change the size of array to 40.
|
Slide Number 8
About slide |
Information on the Spoken Tutorial project is available on the Internet. |
Slide number 9
About slide |
Workshops based on Spoken Tutorials are also available. |
Slide number 10
Acknowledgment |
Spoken Tutorial Project is funded by the NMEICT, MHRD. |
Slide number 11
Thank you slide |
This is Tarun Gangwar from IIT Bombay signing off. Thank you. |