PoojaMoolya at 09:57, 13 June 2019

2019-06-13T09:57:45Z

PoojaMoolya: Created page with " {| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello friends. Welcome to the tutorial on '''plotting charts''' |- | 00:06 | At the end of this tutorial, you will..."

2019-05-30T09:04:48Z

Created page with " {| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello friends. Welcome to the tutorial on '''plotting charts''' |- | 00:06 | At the end of this tutorial, you will..."

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{| border=1
| '''Time'''
| '''Narration'''

|-
| 00:01
| Hello friends. Welcome to the tutorial on '''plotting charts'''

|-
| 00:06
| At the end of this tutorial, you will be able to
Create '''pie charts'''

Create '''bar charts '''and

Find more information on '''matplotlib'''

|-
| 00:18
| To record this tutorial, I am using

'''Ubuntu Linux 14.04''' operating system

|-
| 00:24
| '''Python 3.4.3''' and '''IPython 5.1.0'''

|-
| 00:31
| To practice this tutorial, you should know how to

run basic '''Python''' '''commands''' on the '''ipython''' '''console'''

|-
| 00:39
| '''Load data '''from''' '''files''' '''and '''Plot data'''.

|-
| 00:42
| If not, see the relevant Python tutorials on this website.

|-
| 00:47
| Let us first open the '''Terminal '''by pressing '''Ctrl+Alt+T '''keys simultaneously.

Now, type '''ipython3''' and press '''Enter'''.

|-
| 00:58
| Let us initialize the '''pylab''' package.

Type '''%pylab '''and press''' Enter.'''

|-
| 01:06
| A '''pie''' '''chart''' is a circular chart divided into sectors, to illustrate numerical proportion

|-
| 01:12
| The syntax for pie() function is as follows: '''pie ''inside parentheses'' values ''comma'' labels ''equal to'' labels'''

|-
| 01:22
| Where '''values are '''the data to be plotted and '''labels''' – the label for each wedge in the pie chart

|-
| 01:30
| Plot a '''pie''' '''chart''' representing the profit percentage of company A.

|-
| 01:35
| Use the data from file '''company-a-data.txt''' available in the code file link of this tutorial

|-
|01:43
| The data file has two columns with a set of values in each column.

|-
| 01:48
| The first column represents years. The second column represents the profit percentages.

|-
| 01:55
| To produce a scatter plot, we first need to load the data from the file using '''loadtxt''' command.

|-
| 02:03
| Let us clear the '''terminal'''.

Type '''year ''comma'' profit ''equal to'' loadtxt ''inside parentheses inside single quotes'' add the path of the file company-a-data.txt ''comma'' unpack ''equal to'' True''' and press '''Enter'''

|-
| 02:28
| '''unpack ''equal to'' True --> returns''' the '''transposed array '''of '''data'''.

|-
| 02:33
| Type '''clf ''open and close parentheses'' '''to clear the plot window, if any plots executed previously.

|-
| 02:41
| Type '''pie(profit ''comma'' labels equal to year)''' and press '''Enter'''.

|-
| 02:50
| Notice that we passed two arguments to the function '''pie()'''.

|-
| 02:55
| First one being the '''values,''' which is '''profit''' in our case.

|-
| 02:59
| The next one being the set of '''labels''' to be used in the '''pie chart''', which is '''year''' in our case.

|-
| 03:05
| Pause the video here.

Try out the following exercise and resume the video.

|-
| 03:11
| Plot a '''pie''' '''chart''' with the same data with the following colors for each wedges.

'''white, red, black, magenta,'''

|-
| 03:19
| '''yellow, blue, green, cyan,'''

|-
| 03:21
|'''yellow, magenta '''and''' blue'''.

|-
| 03:24
| Hint: In your '''ipython interpreter, '''try typing '''pie question mark'''.

|-
|03:29
| Solution to Exercise 2

Clear the '''plot window '''by typing '''clf open and close parentheses''' and press '''Enter'''.

|-
| 03:39
| Type '''pie inside parentheses profit comma labels equal to year comma colors equal to inside parentheses the color codes ''' and press '''Enter'''.

|-
| 03:57
| This will display a pie chart with each wedge having the color as specified in the parameters.

|-
| 04:04
| A '''bar chart''' is a '''chart''' with rectangular bars

with lengths proportional to the values that they represent.

|-
| 04:12
| The syntax for bar chart is: '''bar ''inside parentheses'' x ''comma'' y'''

where '''x ''' a sequence of data and '''y ''' a sequence of data, the same length of x

|-
| 04:28
| Plot a '''bar chart''' representing the profit percentage of company A.

|-
| 04:33
| Use the data from file '''company-a-data.txt'''.

|-
| 04:38
| Solution to Exercise 3

Clear the '''plot window '''by typing '''clf ''open and close parentheses'''''

|-
| 04:47
| Type '''bar ''open and close parentheses'' year ''comma'' profit''' and press '''Enter'''.

|-
| 04:56
| This will display a bar chart representing the profit percentage of company A

|-
| 05:02
| Plot a '''bar chart '''as shown in the image:

'''Hint''': Bar chart is not filled and which is '''hatched''' with 45<sup>o</sup> slanting lines.

|-
| 05:13
| The data for the chart may be obtained from the file '''company-a-data.txt'''.

|-
| 05:19
| Hint: In your '''ipython interpreter, '''try typing '''bar ''question mark'''''

|-
| 05:25
| Solution to Exercise 4

Clear the '''plot window '''by typing '''clf ''open and close parentheses'''''

|-
| 05:33
| Type '''bar ''open and close parentheses'' year ''comma'' profit ''comma'' fill ''equal to'' False ''comma'' hatch ''equal to inside single quotes'' ''slanting line''''' and press '''Enter'''.

|-
| 05:54
| This will display a bar chart which is not filled and which is '''hatched''' with 45<sup>o</sup> slanting lines

|-
| 06:02
| Help about '''matplotlib''' can be obtained from '''matplotlib.sourceforge.net/contents.html'''

More plots can be seen at the following links

|-
| 06:18
| This brings us to the end of this tutorial.

In this tutorial we learnt to, Plot a '''pie''' '''chart''' using '''pie()''' function

|-
| 06:28
| Plot a '''bar''' '''chart''' using '''bar()''' function

|-
| 06:31
| And Access the '''matplotlib '''online help

|-
| 06:34
| Here are some self assessment questions for you to solve.

|-
| 06:38
| What statement can be issued to generate a bar chart with vertical line hatching?

|-
| 06:45
| And the answer is, '''bar x ''comma'' y ''comma'' fill '' is equal to'' False ''comma'' hatch ''is equal to'' a vertical line)''' is the correct option to generate a '''bar''' '''chart''' with vertical '''line''' '''hatching'''.

|-
| 07:00
| Please post your timed queries in this forum.

|-
| 07:04
| Please post your general queries on Python in this forum.

|-
| 07:09
| FOSSEE team coordinates the TBC project.

|-
| 07:13
| Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India.

For more details, visit this website.

|-
|07:23
| This is Trupti Kini from FOSSEE IIT Bombay signing off.

Thank you.

|}

@@ Line 245: / Line 245: @@
 |-
 | 06:45
-| And the answer is,  '''bar x ''comma'' y ''comma'' fill '' is equal to'' False ''comma'' hatch ''is equal to'' a vertical line)''' is the correct option to generate a '''bar''' '''chart''' with vertical '''line''' '''hatching'''.
+| And the answer is,  '''bar x ''comma'' y ''comma'' fill '' is equal to'' False ''comma'' hatch ''is equal to'' a vertical line''' is the correct option to generate a '''bar''' '''chart''' with vertical '''line''' '''hatching'''.
 |-

Python-3.4.3/C2/Plotting-Charts/English-timed - Revision history

PoojaMoolya at 09:57, 13 June 2019

PoojaMoolya: Created page with " {| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello friends. Welcome to the tutorial on '''plotting charts''' |- | 00:06 | At the end of this tutorial, you will..."