Python/C2/Getting-started-with-sage-notebook/English-timed - Revision history

PoojaMoolya at 05:26, 27 March 2017

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PoojaMoolya at 12:19, 20 February 2017

2017-02-20T12:19:41Z

Gaurav at 07:11, 10 July 2014

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Sneha at 09:33, 11 March 2013

2013-03-11T09:33:51Z

Sneha at 09:30, 11 March 2013

2013-03-11T09:30:45Z

Minal: Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello friends and Welcome to this spoken tutorial on "Getting started with Sage and Sage notebook". |- | 0:07 | At the end of this tut…'

2013-01-02T11:57:52Z

Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello friends and Welcome to this spoken tutorial on "Getting started with Sage and Sage notebook". |- | 0:07 | At the end of this tut…'

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{| border=1
!Timing
!Narration
|-
| 0:00
| Hello friends and Welcome to this spoken tutorial on "Getting started with Sage and Sage notebook".

|-
| 0:07
| At the end of this tutorial, you will be able to,

# Know what Sage and Sage notebook are.
# Start a Sage shell or notebook.
# Create new worksheets.
# Know about the menu options available and the cells in the worksheet.
# Evaluate cells, create and delete cells, navigate them.
# Make annotations in the worksheet.
# Use tab completion.
# Use code from other languages in the cells.
# Use the offline help available.

|-
| 0:30
| To start with, let us first understand, what is Sage?

|-
|0:33
|Sage is a free, open-source mathematical software.

|-
|0:35
|Sage can do a lot of math stuff for you including, but not limited to, algebra, calculus, geometry, cryptography, graph theory among other things.

|-
|0:48
| It can also be used as an aid in teaching and research in any of the areas that Sage supports.

|-
|0:53
|So let us start Sage now

|-
|0:56
| We are assuming that you have Sage installed on your computer now.

|-
|1:00
|If not please visit the page http colon slash slash sagemath dot org slash doc slash tutorial slash introduction dot html#installation for the tutorial on how to install Sage.

|-
|1:13
| Now you can open the terminal

|-
| 1:17
| So, let us now learn how to start Sage.

|-
| 1:19
| So type on the terminal sage and hit enter

|-
| 1:27
| This should start a new Sage shell with the prompt sage.

|-
|1:32
|So now we can type all the commands that Sage supports here.

|-
|1:35
|But Sage comes bundled with a much more elegant tool called Sage Notebook.

|-
|1:40
|So what is Sage Notebook?

|-
|1:44
| Sage Notebook provides a web based user interface to use Sage.

|-
|1:48
|So once we have a Sage notebook server up and running, all we want is a browser to access the Sage functionality.

|-
|1:56
| For example there is an official instance of Sage Notebook server running at http colon double slash sagenb dot org.

|-
|2:06
| You can visit that page, create an account there and start using Sage!

|-
|2:09
| So all you need is just a modern browser to use Sage and nothing else!

|-
|2:15
| The Sage notebook also provides a convenient way of sharing and publishing our work, which is very handy for research and teaching.

|-
|2:23
|However we can also run our own instances of Sage notebook servers on all the computers, if we have a local installation of Sage to start the notebook server just type notebook and brackets.

|-
| 2:43
| This will start the Sage Notebook server.

|-
|2:46
|If we are starting the notebook server for the first time, we are prompted to enter the password for the admin.

|-
|2:52
| Type the password and make a note of it.

|-
|2:54
| After this Sage automatically starts a browser page for you with the notebook opened.

|-
|3:01
|If it doesn't automatically start a browser page, check if the Notebook server started and there were no problems.

|-
|3:10
| If so, open your browser and in the address bar, type the URL shown in the instructions upon running the notebook command on the sage prompt.

|-
|3:20
|So you can type http colon double slash localhost colon 8000, in our case it is the point.

|-
| 3:31
| The notebook command gives an instruction telling Open your web browser to localhost colon 8000.

|-
|3:40
| If you are not logged in yet, it shows the Notebook home page and textboxes to type the username and the password.

|-
|3:48
| You can use the username 'admin' and the password you gave while starting the notebook server for the first time.

|-
|3:54
| There are also links to recover forgotten password and to create new accounts.

|-
|4:00
|Once we are logged in with the admin account we can see the notebook admin page.

|-
|4:03
| A notebook can contain a collection of Sage Notebook worksheets.

|-
|4:09
| Worksheet is basically a working area.

|-
|4:12
|This is where we enter all the Sage commands on the notebook.

|-
| 4:17
| The admin page lists all the worksheets created.

|-
| 4:21
| On the topmost part of this page we have the links to various pages.

|-
| 4:27
| The home link takes us to the admin home page.

|-
|4:30
| The published link takes us to the page which lists all the published worksheets.

|-
|4:34
|The log link has the complete log of all the actions we did on the notebook.

|-
|4:38
| We have the settings link where we can configure our notebook, the notebook server, create and manage accounts.

|-
|4:45
| We have a link to help upon clicking opens a new window with the complete help of Sage.

|-
|4:52
| The entire documentation of Sage is supplied with Sage for offline reference and this help link is the way to get into it.

|-
| 5:01
| Then we can report bugs about Sage by clicking on Report a Problem link and there is a link to sign out of the notebook.

|-
| 5:10
| We can create a new worksheet by clicking New Worksheet link

|-
| 5:13
| Sage prompts you for a name for the worksheet.

|-
|5:16
|Let us name the worksheet as 'nbtutorial'.

|-
|5:24
|Now we have our first worksheet which is empty.

|-
|5:31
|Every Sage command must be entered in this cell.

|-
|5:34
| A cell is equivalent to the prompt on console.

|-
|5:37
| When we create a new worksheet, to start with we will have one empty cell.

|-
|5:43
| Let us try out some math here

|-
|5:46
|So you can type on the terminal 2 plus 2

|-
|5:52
|then 57 point 1 raised to 100

|-
| 6:00
| The cap operator is used for exponentiation.

|-
| 6:04
| If you observed carefully, we typed two commands but the output of only last command was displayed.

|-
|6:12
| By default each cell displays the result of only the last operation.

|-
|6:16
|We have to use print statement to display all the results we want to be displayed.

|-
| 6:22
| Now to perform more operations, we want more cells.

|-
|6:27
| So how do we create a new cell?

|-
|6:30
| It is very simple.

|-
| 6:31
| As we hover our mouse above or below the existing cells we see a blue line, by clicking on this new line we can create a new cell.

|-
| 6:46
| We have a cell, we have typed some commands in it

|-
|6:51
|So type matrix then within brackets 1,2,3,4 then charat then again in brackets minus 1.

|-
|7:07
|but how do we evaluate that cell?

|-
|7:09
| Pressing Shift along with Enter evaluates the cell.

|-
|7:17
| Alternatively we can also click on the evaluate link to evaluate the cell

|-
| 7:22
| After we create many cells, we may want to move between the cells.

|-
|7:27
| To move between the cells use Up and Down arrow keys.

|-
|7:31
| Also clicking on the cell will let you edit that particular cell.

|-
| 7:38
| To delete a cell, clear the contents of the cell and hit backspace

|-
| 7:41
| If you want to add annotations in the worksheet itself, on the blue line that appears on hovering the mouse around the cell, Hold Shift and click on the line.

|-
| 7:56
| This creates a What You See Is What You Get cell.

|-
|8:09
|We can type in the editable cell.

|-
|8:12
|This text contains both the bold text and italicized text.

|-
|8:36
|Then you can type, it also contain bulleted list.

|-
|9:02
|Then it also contain enumerated list.

|-
| 9:29
| In the same cell we can display typeset math using the LaTeX like syntax

|-
|9:34
|So we have to type below that in dollar sign then slash int underscore zero raised to slash infty space e raised to power -x in curly brackets then slash then dx then again a dollar symbol.

|-
| 9:54
| We enclose the math to be typeset within dollar and dollar or dollar dollar and dollar dollar as in LaTeX.

|-
|10:02
|We can also obtain help for a particular Sage command or function within the worksheet itself by using a question mark following the command

|-
|10:10
|So you can type for ex colon sine question mark and hit enter.

|-
|10:24
|You have to press shift enter.

|-
| 10:27
| Evaluating this cell gives me the entire help for the sine function inline on the worksheet itself.

|-
| 10:34
| Similarly we can also look at the source code of each command or function using double question mark

|-
|10:39
|so for ex: you can type matrix question mark question mark then press shift and enter.

|-
| 10:48
| Sage notebook also provides the feature for autocompletion.

|-
|10:52
| To autocomplete a command type first few unique characters and hit tab key

|-
| 11:07
| To list all the methods that are available for a certain variable or a datatype, we can use the variable name followed by the dot to access the methods available on it and then hit tab.

|-
|11:20
|So

|-
|11:26
|you can type

|-
|11:28
|s=

|-
|11:33
|within single quotes hello

|-
|11:37
|then s dot rep then tab

|-
| 11:51
| The output produced by each cell can be one of the three states.

|-
| 11:55
| It can be either the full output, or truncated output or hidden output.

|-
| 12:00
| The output area will display the error, if the Sage code we wrote in the cell did not successfully execute

|-
| 12:09
|So you can type a comma b is equal to 10

|-
| 12:16
| The default output we obtained now is a truncated output.

|-
| 12:19
| Clicking at the left of the output area when the mouse pointer turns to hand gives us the full output

|-
|12:30
| clicking again makes the output hidden and it cycles.

|-
| 12:38
| Lastly, Sage supports a variety of languages and each cell on the worksheet can contain code written in a specific language.

|-
| 12:45
| It is possible to instruct Sage to interpret the code in the language we have written.

|-
| 12:54
| This can be done by putting percentage sign(%) followed by the name of the language.

|-
| 13:01
| For example, to interpret the cell as Python code we put as the first line in the cell percentage symbol then python.

|-
| 13:14
| '''Similarly we have: %sh for shell scripting,'''percentage fortran for Fortran, percentage gap for GAP and so on.

|-
|13:25
|Let us see how this works.

|-
|13:26
| Say I have an integer.

|-
|13:28
| The type of the integer in default Sage mode is

|-
|13:31
|a is equal to 1

|-
|13:34
|Then type within brackets a.

|-
| 13:45
| <nowiki>Output will be: <type 'sage dot rings dot integer dot Integer'></nowiki>

|-
|13:52
|or type within colon int

|-
| 13:58
| We see that Integers are Sage Integers.

|-
|14:00
|Now let us put percentage python as the first line of the cell and execute the same code snippet

|-
|14:09
|So you can type there in the cell

|-
|14:13
|percentage python then a is equal to 1 then type a

|-
| 14:20
| You can also get the <nowiki>Output colon<type 'int'></nowiki>

|-
|14:26
|Now we see that the integer is a Python integer.

|-
|14:28
| Why?

|-
|14:29
| Because now we instructed Sage to interpret that cell as Python code.

|-
| 14:36
| This brings us to the end of this tutorial.

|-
|14:38
| In thus tutorial, we have learnt to, Know about Sage and sage notebook.

|-
|14:42
| Start Sage shell and sage notebook.

|-
|14:45
| Create accounts and start using the notebook.

|-
|14:48
| Create new worksheets.

|-
|14:49
|Access the menus available on the notebook.

|-
|14:51
| Evaluate cells in the worksheet.

|-
|14:54
|7. delete the cells. and navigate around the cells.

|-
|14:57
|8. Make annotations in the worksheet.

|-
|14:59
|9. Use tab completions.

|-
|15:00
|10. Embed code of other scripting languages in the cells.

|-
| 15:05
| Here are some self assessment questions for you to solve

|-
|15:08
|1. Each cell in a sage worksheet displays the result of only the last operation.

|-
|15:13
|True or False.

|-
|15:14
|2. How do you evaluate a cell using the keyboard keys?

|-
|15:17
| Shift key along with enter key

|-
|15:19
| Control key along with enter key

|-
|15:21
| Alt key along with enter key

|-
| 15:23
| And the answers,

|-
|15:26
|1.The answer is True.

|-
|15:28
| By default each cell displays the result of only the last operation.

|-
|15:31
|2.We have to press Shift along with Enter evaluates the cell.

|-
| 15:36
| So we hope you have enjoyed This tutorial and found it useful.

|-
|15:41
|Thank you!

|}

@@ Line 266: / Line 266: @@
 |-
 |06:30
-| It is very simple.
+| It is very simple. As we hover our mouse above or below the existing cells we see a blue line, by clicking on this new line we can create a new cell.
-−
-|-
-| 06:31
-| As we hover our mouse above or below the existing cells we see a blue line, by clicking on this new line we can create a new cell.
 |-
@@ Line 449: / Line 445: @@
 |-
 |13:25
-|Let us see how this works.
+|Let us see how this works. Say I have an integer.
-−
-|-
-|13:26
-| Say I have an integer.
 |-
@@ Line 501: / Line 493: @@
 |-
 |14:28
-| Why?
+| Why? Because now we instructed Sage to interpret that cell as Python code.
-−
-|-
-|14:29
-| Because now we instructed Sage to interpret that cell as Python code.
 |-
@@ Line 525: / Line 513: @@
 |-
 |14:48
-| Create new worksheets.
+| Create new worksheets. Access the menus available on the notebook.
-−
-|-
-|14:49
-|Access the menus available on the notebook.
 |-
@@ Line 545: / Line 529: @@
 |-
 |14:59
-|9. Use tab completions.
+|9. Use tab completions. 10. Embed code of other scripting languages in the cells.
-−
-|-
-|15:00
-|10. Embed code of other scripting languages in the cells.
 |-
@@ Line 561: / Line 541: @@
 |-
 |15:13
-|True or False.
+|True or False. 2. How do you evaluate a cell using the keyboard keys?
-−
-|-
-|15:14
-|2. How do you evaluate a cell using the keyboard keys?
 |-

@@ Line 10: / Line 10: @@
 | 00:07
 | At the end of this tutorial, you will be able to,
 Know what Sage and Sage notebook are.
-# Know what Sage and Sage notebook are.
+Start a Sage shell or notebook.
-# Start a Sage shell or notebook.
+Create new worksheets.
-# Create new worksheets.
+Know about the menu options available and the cells in the worksheet.
-# Know about the menu options available and the cells in the worksheet.
+Evaluate cells, create and delete cells, navigate them.
-# Evaluate cells, create and delete cells, navigate them.
+Make annotations in the worksheet.
-# Make annotations in the worksheet.
+Use tab completion.
-# Use tab completion.
+Use code from other languages in the cells.
-# Use code from other languages in the cells.
+Use the offline help available.
-# Use the offline help available.
 |-

@@ Line 32: / Line 32: @@
 |-
 |0:35
-|Sage can do a lot of math stuff for you including, but not limited to, algebra, calculor, geometry, cryptography, graph theory among other things.
+|Sage can do a lot of math stuff for you including, but not limited to, algebra, calculus, geometry, cryptography, graph theory among other things.
 |-

@@ Line 24: / Line 24: @@
 |-
 | 0:30
-| To start with, let us first understand, what is Sage?
+| To start with,  what is Sage?
 |-
@@ Line 32: / Line 32: @@
 |-
 |0:35
-|Sage can do a lot of math stuff for you including, but not limited to, algebra, calculus, geometry, cryptography, graph theory among other things.
+|Sage can do a lot of math stuff for you including, but not limited to, algebra, calculor, geometry, cryptography, graph theory among other things.
 |-
@@ Line 48: / Line 48: @@
 |-
 |1:00
-|If not please visit the page http colon slash slash sagemath dot org slash doc slash tutorial slash introduction dot html#installation for the tutorial on how to install Sage.
+|If not please visit the sagemath dot org slash doc slash tutorial slash introduction dot html#installation for the tutorial on how to install Sage.
 |-
@@ Line 124: / Line 124: @@
 |-
 |3:01
-|If it doesn't automatically start a browser page, check if the Notebook server started and there were no problems.
+|If it doesn't automatically start a web page  browser , check if the Notebook server started and there were no problems.
 |-
@@ Line 148: / Line 148: @@
 |-
 |3:54
-| There are also links to recover forgotten password and to create new accounts.
+| There are also links that recover forgotten password and to create new accounts.
 |-
@@ Line 188: / Line 188: @@
 |-
 |4:38
-| We have the settings link where we can configure our notebook, the notebook server, create and manage accounts.
+| We have the settings link where we can configure our notebook & the notebook server & create and manage accounts.
 |-
@@ Line 236: / Line 236: @@
 |-
 |5:46
-|So you can type on the terminal 2 plus 2
+|So you can type there 2 plus 2
 |-
@@ Line 260: / Line 260: @@
 |-
 | 6:22
-| Now to perform more operations, we want more cells.
+| Now we perform more operations, we want more cells.
 |-
@@ Line 292: / Line 292: @@
 |-
 |7:17
-| Alternatively we can also click on the evaluate link to evaluate the cell
+| Alternatively we can also click on the evaluate link  and evaluate the cell given below.
 |-
@@ Line 340: / Line 340: @@
 |-
 |9:34
-|So we have to type below that in dollar sign then slash int underscore zero raised to slash infty space e raised to power -x in curly brackets then slash then dx then again a dollar symbol.
+|So we have to type below that in dollar sign then slash int underscore zero raised to slash infty space e raised to power -x in curly braces  then slash then dx then again a dollar symbol.
 |-
@@ Line 352: / Line 352: @@
 |-
 |10:10
-|So you can type for ex colon sine question mark and hit enter.
+|So you can type for example sine question mark and hit enter.
 |-
@@ Line 360: / Line 360: @@
 |-
 |  10:27
-| Evaluating this cell gives me the entire help for the sine function inline on the worksheet itself.
+| Evaluating this cell gives me the entire help for the sine function inline and the worksheet itself.
 |-
 | 10:34
-| Similarly we can also look at the source code of each command or function using double question mark
+| Similarly we can also look at the source code of such command or function using double question mark
 |-
@@ Line 376: / Line 376: @@
 |-
 |10:52
-| To autocomplete a command type first few unique characters and hit tab key
+| To autocomplete a command type first few unique characters and hit tab key. So you can type plot then tab
 |-
 |  11:07
-| To list all the methods that are available for a certain variable or a datatype, we can use the variable name followed by the dot to access the methods available on it and then hit tab.
+| To list all the methods that are available for a certain variable or a datatype, we can use the variable name followed by the dot to access the methods available on it
-−
 |-
 |11:20
@@ Line 412: / Line 411: @@
 |-
 | 12:00
-| The output area will display the error, if the Sage code we wrote in the cell did not successfully execute
+| The output area will display the error, if the Sage code was wrote in the cell did not successfully execute
 |-
@@ Line 432: / Line 431: @@
 |-
 |  12:38
-| Lastly, Sage supports a variety of languages and each cell on the worksheet can contain code written in a specific language.
+| Lastly, Sage supports a variety of languages and each cell on the worksheet contain code written in a specific language.
 |-
@@ Line 472: / Line 471: @@
 |-
 | 13:45
-| <nowiki>Output will be: <type 'sage dot rings dot integer dot Integer'></nowiki>
+| Output will be: type 'sage dot rings dot integer dot Integer'>>
 |-
@@ Line 496: / Line 495: @@
 |-
 | 14:20
-| You can also get the <nowiki>Output colon<type 'int'></nowiki>
+| So You can also get the Output colon type 'int'><
 |-