Python/C2/Embellishing-a-plot/English-timed - Revision history

PoojaMoolya at 12:30, 20 February 2017

2017-02-20T12:30:33Z

Sandhya.np14 at 12:10, 30 October 2015

2015-10-30T12:10:16Z

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Sandhya.np14 at 09:02, 30 October 2015

2015-10-30T09:02:23Z

Sandhya.np14 at 06:03, 30 October 2015

2015-10-30T06:03:01Z

Gaurav at 06:50, 10 July 2014

2014-07-10T06:50:25Z

Gaurav at 06:49, 10 July 2014

2014-07-10T06:49:53Z

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Kavita salve at 11:39, 17 October 2013

2013-10-17T11:39:48Z

Sneha at 07:05, 7 March 2013

2013-03-07T07:05:11Z

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Minal: Created page with '{| border=1 !Timing !Narration |- | 0:00 | Welcome to the tutorial on "Embellishing a Plot". |- | 0:06 | At the end of this tutorial, you will be able to, # Modify the attrib…'

2013-01-02T10:46:45Z

Created page with '{| border=1 !Timing !Narration |- | 0:00 | Welcome to the tutorial on "Embellishing a Plot". |- | 0:06 | At the end of this tutorial, you will be able to, # Modify the attrib…'

New page

{| border=1
!Timing
!Narration
|-

| 0:00
| Welcome to the tutorial on "Embellishing a Plot".

|-
| 0:06
| At the end of this tutorial, you will be able to,

# Modify the attributes of the plot -- color, line style,linewidth.
# Add a title to the plot with embedded LaTeX.
# Label x and y axes.
# Add annotations to the plot.
# Set and Get the limits of axes.

|-
| 0:27
| So, Before beginning this tutorial,we would suggest you to complete the tutorial on "Using plot interactively".

|-
| 0:34
| so,let us start ipython with pylab loaded, open the terminal and type ipython hyphen pylab.

|-
| 0:48
| We shall first make a simple plot and start decorating it.

|-
| 0:54
|So type x is equal to linspace within brackets -2,4,20

|-
| 1:06
|then type plot(x,sin(x))

|-
| 1:15
| As we can see, the default colour and the default thickness of the line is as decided by pylab.

|-
| 1:23
| Wouldn't it be nice if we could control these parameters in the plot?

|-
| 1:28
|This is possible by passing additional arguments to the plot command.

|-
| 1:33
| We shall first clear the figure and plot the same by passing the additional color argument.

|-
| 1:39
| Pass the argument 'r' for red color.

|-
| 1:44
| So type clf, then plot within brackets x,sin(x),within single quotes r.

|-
| 2:13
| The same plot is seen in red color.

|-
| 2:16
| The thickness of the line can be altered by 'linewidth' argument.

|-
| 2:20
|So type plot within brackets x,cos(x),linewidth is equal to 2

|-
| 2:34
|Now, a plot with line thickness 2 is produced.

|-
| 2:40
| Pause the video and do this exercise and then resume the video.

|-
| 2:45
|Plot sin(x) in blue color along with linewidth as 3.

|-
| 2:53
| So, now switch to terminal for solution A combination of color and linewidth would do the job for us.

|-
| 3:01
|So , type clf , then type plot within brackets x, sin(x),within single quotes b,linewidth is equal to 3.

|-
| 3:16
| To get the style of line as bunch of points not joined, pass the linestyle argument with or without color argument.

|-
| 3:25
| So for that type on the terminal clf, then type plot x,sin(x),within single quotes dot.

|-
| 3:43
| We get a plot with only points.

|-
| 3:49
| To get the same plot in blue color type clf, then type plot within brackets x, sin(x),within single quotes b dot.

|-
| 4:02
| Other available options for passing arguments can be seen in the documentation of plot.

|-
| 4:07
|For that , you can type in the terminal plot then question mark.

|-
| 4:19
| So, you can actually go through the documentation.

|-
| 4:23
| So , you pause the video and do this exercise and then resume the video.

|-
| 4:28
|Plot the sine curve with green filled circles.

|-
| 4:33
| so ,for solutionNow, switch to terminal . We use a combination of linestyle and color.

|-
|4:40
|So ,type clf() then type plot within brackets x,cos(x), within single quotes go.

|-
|4:56
|So, Pause the video here, try out the following exercise and resume the video.

|-
|5:02
|Plot the curve of x versus tan(x) in red dash line and linewidth 3.

|-
| 5:13
| So for solution, we will switch to terminal .

|-
| 5:18
|Here we shall use a combination of linewidth argument and linestyle.

|-
|5:22
|So in terminal you can type clf() then plot within brackets x, cos(x), within single quotes r hyphen hyphen

|-
| 5:36
| Now that we know how to produce a bare minimum plot with color, style and thickness of our interest, we shall look at further decorating the plot.

|-
| 5:46
| Let us start with a plot for the function minus x squared plus 4x minus 5.

|-
|5:52
|So for that you have to type clf then plot within brackets x,minus x star x plus 4 star x minus 5,'r',linewidth is equal to 2.

|-
| 6:16
| As you can see, the figure does not have any description describing the plot.

|-
| 6:21
|To add a title to the plot to describe what the plot is,use the <tt>title</tt> command.

|-
|6:26
|So, we can type in the terminal title within brackets and double quotes Parabolic function - x squared plus 4x minus 5

|-
|6:42
|The figure now has a title.

|-
|6:45
| But it is not formatted and does not look clean.

|-
| 6:49
| It would look shabby if there were fractions and more complex functions like log and exp.

|-
| 6:57
| So, Wouldn't it be good if the title is seen in LaTeX like formatting?

|-
| 7:03
| This is possible by adding a <tt>$</tt> sign before and after the part of the string that should be in LaTeX style.

|-
|7:10
| So in the command you can type title within brackets and double quotes Parabolic function dollar sign minus x squared plus 4x minus 5 dollar sign

|-
| 7:26
| As we can see, the polynomial is now formatted.

|-
| 7:30
| Pause the video here, try out the following exercise and resume the video.

|-
| 7:35
| Change the title of the figure such that the whole title is formatted in LaTeX style.

|-
| 7:41
| Switch to terminal for solution.

|-
| 7:45
| The solution is to enclose the whole string in between $.

|-
|7:51
|So you can type title within brackets dollar sign Parabolic function -x squared plus 4x minus 5 dollar sign.

|-
| 8:01
| Although we have title, the plot is not complete without labelling x and y axes.

|-
| 8:05
| we shall label x-axis to "x" and y-axis to "f(x)".

|-
| 8:12
|So for that you can type in terminal xlabel within brackets in double quotes x , then in terminal ylabel within brackets in double quotes f of x.

|-
| 8:31
| As you can see, <tt>xlabel</tt> and 'ylabel' command takes a string as an argument.

|-
| 8:37
| xlabel sets the label to x-axis as 'x' and ylabel sets the name to the y-axis as 'f(x)'.

|-
| 8:50
| Pause the video here, try out the following exercise and resume the video.

|-
| 8:57
| Set the x and y labels as "x" and "f(x)" in LaTeX style.

|-
| 9:04
| Since we need LaTeX style formatting, all we have to do is enclose the string in between two $.

|-
| 9:10
| Switch to terminal for solution and type xlabel within brackets dollar sign x dollar sign.
ylabel within brackets and double quotes dollar sign f of x dollar sign.

|-
| 9:31
| The plot is now almost complete except that the points are not named.

|-
| 9:37
| For example the point (2, -1) is the local maxima.

|-
| 9:42
| We would like to name the point accordingly.

|-
|9:47
|To do this use the function <tt>annotate</tt>.

|-
|9:49
|So for that you can type in the terminal annotate within brackets in double quotes local maxima comma xy is equal to within brackets 2 comma -1.

|-
| 10:04
| As you can see, the first argument to <tt>annotate</tt> command is the name we would like to mark the point as, and the second argument is the co-ordinates of the point at which the name should appear.

|-
| 10:18
| It is a tuple containing two numbers.

|-
| 10:20
| The first is x co-ordinate and second is y co-ordinate.

|-
| 10:25
| Pause the video, do this exercise and then resume the video.

|-
|10:30
|Make an annotation called "root" at the point (-4, 0).

|-
| 10:38
| What happens to the first annotation ?

|-
| 10:43
| Switch to the terminal for the solution.

|-
|10:46
|As we can see, every annotate command makes a new annotation on the figure.

|-
|10:52
|Now we have everything we need to decorate a plot, but the plot would be incomplete if we can not set the limits of axes.

|-
|11:01
|This can be done using the button provided on the plot window.

|-
|11:06
|Else limits also can be get and set from the terminal.

|-
| 11:13
| Use "xlim()" and "ylim()" functions to get the limits.

|-
|11:17
|So type in the terminal annotate within brackets in double quotes root comma xy is equal to within brackets minus 4 comma 0.

|-
| 11:32
| <tt>xlim</tt> function returns the current x axis limits and <tt>ylim</tt> function returns the current y-axis limits.

|-
|11:41
|Set the limits of x-axis from -4 to 5 by giving command xlim(-4,5).

|-
| 12:12
| Similarly set the limits of y-axis appropriately.

|-
| 12:22
| Pause the video, do this exercise and then resume the video.

|-
|12:27
|Set the limits of axes such that the area of interest is the rectangle (-1, -15) and (3, 0)

|-
| 12:37
| Switch to the terminal for the solution.

|-
|12:40
|As we can see, the lower and upper limits of x-axis in the exercise are -1 and 3 respectively.

|-
|12:46
| The lower and upper limits of y-axis are -15 and 0 respectively.

|-
|12:51
|So in the command we can type xlim within brackets -1 comma 3 and ylim within brackets -15 comma 0.

|-
| 13:02
| This gives us the required rectangle.

|-
| 13:09
| This brings us to the end of this tutorial.In this tutorial,we have learnt to,Modify the attributes of plot like color, line width, line style by passing additional arguments.

|-
| 13:20
| Add title to a plot using 'title' command.

|-
| 13:24
| Incorporate LaTeX style formatting by adding a <tt>$</tt> sign before and after the part of the string.

|-
| 13:30
| Label x and y axes using xlabel() and ylabel() commands.

|-
| 13:36
| Then, add annotations to a plot using annotate() command.

|-
| 13:38
| Get and set the limits of axes using xlim() and ylim() commands.

|-
| 13:46
| Here are some self assessment questions for you to solve.

|-
| 13:50
| 1. Draw a plot of cosine graph between -2pi to 2pi with line thickness 4.

|-
| 13:57
| 2. Read through the documentation and find out, is there a way to modify the alignment of text in the command <tt>ylabel</tt>.

|-
| 14:05
| Yes or No are the options.

|-
| 14:07
| And the final question. How do you set the title as x^2-5x+6 in LaTex style formatting.

|-
| 14:15
| Now, the answers,

|-
| 14:20
| 1. In order to plot a cosine graph between the points -2pi and 2pi with line thickness 3,we use the <tt>linspace</tt> and <tt>plot</tt> command as, x = linspace(-2*pi, 2*pi)

|-
| 14:41
| then plot(x, cos(x), linewidth=4)

|-
| 14:46
| And the second answer is No. We do not have an option to modify the alignment of text in the command <tt>ylabel</tt>.

|-
|14:53
| Then the third and final one. To set the title in LaTex style formatting,we write the equation between two dollar signs as,

title("$x^2-5x+6$")

|-
| 15:11
| Hope you have enjoyed this tutorial and found it useful.

|}

@@ Line 10: / Line 10: @@
 | 00:06
 | At the end of this tutorial, you will be able to-
 Modify the attributes of the plot -- color, line style, line width.
-# Modify the attributes of the plot -- color, line style, line width.
+Add a title to the plot with embedded '''LaTeX'''.
-# Add a title to the plot with embedded '''LaTeX'''.
+Label X and Y axes.
-# Label X and Y axes.
+Add annotations to the plot.
-# Add annotations to the plot.
+Set and Get the limits of axes.
-# Set and Get the limits of axes.
 |-

@@ Line 99: / Line 99: @@
 |-
 | 03:25
-| So for that type on the terminal clf, then type  plot x,sin(x), dot in single quotes.
+| So, for that, type on the terminal '''clf''', then type: '''plot x, sin(x), dot''' in single quotes.
 |-
@@ Line 107: / Line 107: @@
 |-
 | 03:49
-| To get the same plot in blue color type clf, then type plot x, sin(x),within single quotes b dot.
+| To get the same plot in blue color, type: '''clf''', then type '''plot x, sin(x),'''within single quotes '''b dot'''.
 |-
 | 04:02
-| Other available options for passing arguments can be seen in the documentation of plot.
+| Other available options for passing arguments can be seen in the documentation of '''plot'''.
 |-
 | 04:07
-|To see that we can type in the terminal plot then question mark.
+|To see that, we can type in the terminal- '''plot''' then question mark.
 |-
@@ Line 123: / Line 123: @@
 |-
 | 04:23
-| So ,pause the video here and do this exercise and then resume the video.
+| So, pause the video here and do this exercise and then resume the video.
 |-
 | 04:28
-|Plot the sine curve with green filled circles.
+|Plot the '''sine curve''' with green filled circles.
 |-
 | 04:33
-| so ,for solutionNow, switch the terminal . We use a combination of linestyle and color.
+| So, for solution, now switch to the terminal. We use the combination of '''linestyle''' and color.
 |-
 |04:40
-|So ,type clf() then type plot within brackets x,cos(x), within single quotes go.
+|So, type '''clf()''' then type '''plot''' within brackets '''x, cos(x)''', within single quotes '''go'''.
 |-
 |04:56
-|So, Pause the video here, try out the following exercise and resume the video.
+|So, pause the video here. Try out the following exercise and resume the video.
 |-

@@ Line 5: / Line 5: @@
 |-
 |  00:00
-|Hello friends Welcome to the tutorial on "Embellishing a Plot".
+|Hello friends. Welcome to the tutorial on '''Embellishing a Plot'''.
 |-
 | 00:06
-| At the end of this tutorial, you will be able to,
+| At the end of this tutorial, you will be able to-
-# Modify the attributes of the plot -- color, line style,linewidth.
+# Modify the attributes of the plot -- color, line style, line width.
-# Add a title to the plot with embedded LaTeX.
+# Add a title to the plot with embedded '''LaTeX'''.
-# Label x and y axes.
+# Label X and Y axes.
 # Add annotations to the plot.
 # Set and Get the limits of axes.
@@ Line 19: / Line 19: @@
 |-
 | 00:27
-| So, Before beginning this tutorial,we would suggest you to complete the tutorial on "Using plot interactively".
+| So, before beginning this tutorial, we would suggest you to complete the tutorial on '''Using plot interactively'''.
 |-
 | 00:34
-| so,let us start ipython with pylab loaded, open the terminal and type ipython hyphen pylab.
+| So, let us start '''ipython''' with '''pylab''' loaded. Open the terminal and type: '''ipython hyphen pylab'''.
 |-
 | 00:48
-| We shall first make a simple plot and start decorating it.
+| We shall first make a simple '''plot''' and start decorating it.
 |-
 | 00:54
-|So type x is equal to linspace within brackets -2,4,20
+|So, type: '''x is equal to linspace within brackets '''-2, 4, 20'''.
 |-
 | 01:06
-|then type plot(x,sin(x))
+|Then type plot(x, sin(x)).
 |-
 | 01:15
-| As we can see, the default colour and the default thickness of the line is as decided by pylab.
+| As we can see, the default colour and the default thickness of the line is as decided by '''pylab'''.
 |-
@@ Line 59: / Line 59: @@
 |-
 | 01:44
-| So type clf, then plot within brackets x,sin(x),within single quotes r.
+| So, type '''clf''', then '''plot''' within brackets '''x, sin(x)''', within single quotes r.
 |-
@@ Line 67: / Line 67: @@
 |-
 | 02:16
-| The thickness of the line can be altered by 'linewidth' argument.
+| The thickness of the line can be altered by ''''linewidth'''' argument.
 |-
 | 02:20
-|So type plot within brackets x,cos(x),linewidth is equal to 2
+|So, type: '''plot''' within brackets '''x, cos(x), linewidth is equal to 2'''.
 |-
@@ Line 87: / Line 87: @@
 |-
 | 02:53
-| So, now switch to terminal for solution A combination of color and linewidth would do the job for us.
+| So, now switch to '''terminal''' for solution. A combination of color and line width would do the job for us.
 |-
 | 03:01
-|So , type clf , then type plot  x, sin(x),within single quotes b,linewidth is equal to 3.
+|So, type '''clf''' , then type '''plot  x, sin(x)''', within single quotes '''b''', '''linewidth is equal to 3'''.
 |-

@@ Line 435: / Line 435: @@
 |-
 | 14:20
-| 1. In order to plot a cosine graph between the points -2pi and 2pi with line thickness 3,we use the linspace and plot command as, x = linspace(-2*pi, 2*pi)
+| 1. In order to plot a cosine graph between the points -2pi and 2pi with line thickness 4,we use the linspace and plot command as, x = linspace(-2*pi, 2*pi)
 |-

@@ Line 360: / Line 360: @@
 | 12:37
 | Switch to the terminal for the solution.
 |-
@@ Line 447: / Line 446: @@
 | 15:11
 | Hope you have enjoyed this tutorial and found it useful.
 |}