Python/C2/loading-data-from-files/Gujarati - Revision history

Jyotisolanki at 05:15, 14 October 2013

2013-10-14T05:15:37Z

Jyotisolanki at 11:24, 11 October 2013

2013-10-11T11:24:45Z

Jyotisolanki: Created page with '{| border=1 !Visual Cue !Narration |- | 0:01 | Hello Friends and Welcome to this tutorial on "loading data from files". |- | 0:06 | At the end of this tutorial, you will be able…'

2013-10-10T11:03:47Z

Created page with '{| border=1 !Visual Cue !Narration |- | 0:01 | Hello Friends and Welcome to this tutorial on "loading data from files". |- | 0:06 | At the end of this tutorial, you will be able…'

New page

{| border=1
!Visual Cue
!Narration
|-
| 0:01
| Hello Friends and Welcome to this tutorial on "loading data from files".

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

# Read data from files, containing a single column of data
# Read multiple columns of data, separated by spaces or other delimiters.

|-
| 0:19
| Let us switch to the terminal and start IPython, using ipython hypen pylab

|-
| 0:33
| Now, Let us begin with reading the file primes.txt, which contains a list of prime numbers listed in a column, using the loadtxt command.

|-
| 0:45
|Please make sure that you provide the correct path of the file, 'primes.txt'.

|-
| 0:50
|The file, in our case, is presented in slash home slash fossee slash primes.txt.

|-
| 0:59
| Otherwise we can use the cat command to locate the file and read the contents of it.

|-
|1:05
|So type cat slash home slash fossee slash primes.txt

|-
| 1:15
| Now let us read this list into the variable primes.

|-
|1:20
|So type primes = loadtxt within bracket in single quotes slash home slash fossee slash primes.txt

|-
| 1:41
|primes is now a sequence of prime numbers, that was listed in the file,``primes.txt``.

|-
| 1:49
|We now type primes,print primes to see the sequence printed so type print space primes.

|-
| 2:00
| We observe that all the numbers end with a period.

|-
| 2:04
|This is so, because these numbers are actually read as floats

|-
| 2:10
| Now, let us use the loadtxt command to read a file pendulum.txt that contains two columns of data.

|-
| 2:19
| This file contains the length of the pendulum in the first column and the corresponding time period in the second.

|-
| 2:26
| Note that here loadtxt needs both the columns to have equal number of rows.

|-
| 2:31
|We can use the cat command to view the contents of this file.

|-
| 2:36
| So type cat slash home slash fossee slash pendulum.txt

|-
| 2:50
| Let us, now, read the data into the variable pend.

|-
| 2:55
|Again, it is assumed that the file is in slash home slash fossee

|-
| 3:02
|So type pend = loadtxt within bracket in single quote slash home slash fossee slash pendulum.txt

|-
| 3:21
| Let us now print the variable pend and see what it contains.

|-
|3:26
|So type print pend

|-
| 3:31
| Notice that pend is not a simple sequence like primes .

|-
| 3:35
|It has two sequences, containing both the columns of the data file.

|-
| 3:40
| Let us use an additional argument of the load txt command, to read it into two separate, simple sequences.

|-
|3:50
|So type L, T space = space load txt within bracket single quote slash home slash fossee slash pendulum.txt comma unpack=True

|-
| 4:23
| Let us now, print the variables L and T, to see what they contain.

|-
|4:29
|So type print space L
print space T

|-
| 4:39
| Notice, that L and T now contain the first and second columns of data from the data file, pendulum.txt, and they are both simple sequences.

|-
| 4:50
|unpack=True has given us the two columns into two separate sequences instead of one complex sequence.

|-
| 5:00
| Till now, we have learnt the basic use of the load txt command.

|-
| 5:05
| Let us try an example.

|-
| 5:07
|Pause the video here, try out the following exercise and resume the video.

|-
| 5:12
|Read the file pendulum underscore semicolon.txt which contains the same data as pendulum.txt, but the columns are separated by semi-colons instead of spaces.

|-
| 5:27
| Use the IPython help to see how to do this.

|-
|5:34
|Switch back to the terminal

L comma T = loadtxt within bracket in single quote slash home slash fossee slash pendulum underscore semicolon.txt comma unpack=True comma
delimiter=semi-colon within single quote

|-
|6:54
|Okay then type print L

|-
|6:40
|print T

|-
| 6:45
| This brings us to the end of this tutorial.

|-
| 6:48
| In this tutorial, we have learnt to,

|-
| 6:51
| 1. To Read data from files, containing a single column of data using the loadtxt command.

|-
| 6:58
| 2. To Read multiple columns of data, separated by spaces or other delimiters.

|-
| 7:04
| Here are some self assessment questions for you to solve
1. loadtxt can read data from a file with one column only. True or False?

|-
| 7:18
| 2. Given a file data.txt with three columns of data separated by spaces, read it into 3 separate simple sequences.

|-
| 7:29
| 3. Given a file data.txt with three columns of data separated by ":", read it into 3 separate simple sequences.

|-
| 7:45
| And now the answers,1. False.

|-
| 7:50
|loadtxt command can read data from files having both single columns as well as multiple columns.

|-
| 7:58
| 2. A file with three columns of data separated by spaces to be read into 3 separate sequences, we use the loadtxt command as, x = loadtxt within bracket in double quotes data.txt comma unpack=True

|-
| 8:19
| 3. If a file with three columns of data separated by delimiters,we read it into three separate sequences by using an additional argument of delimiter in the loadtxt command
x = loadtxt within bracket in double quotes data.txt comma unpack=True comma delimiter=in double quotes semicolon)

|-
| 8:51
| Hope you have enjoyed this tutorial and found it useful.

|-
| 8:55
| Thank you!

@@ Line 144: / Line 144: @@
 |-
 | 5:07
-|Pause the video here, try out the following exercise and resume the video.
+|વિડીયોને અહીં અટકાવો, આપેલ અભ્યાસને પ્રયાસ કરો અને ફરીથી વિડીયો ચાલુ કરો.
 |-
 | 5:12
-|Read the file pendulum underscore semicolon.txt which contains the same data as pendulum.txt, but the columns are separated by semi-colons instead of spaces.
+|'''pendulum underscore semicolon.txt''' ફાઈલને વાંચો જે '''pendulum.txt''' ની સમાન ડેટા ધરાવે છે, પરંતુ કોલમોને ખાલી જગ્યાને બદલે અર્ધ-વિરામ દ્વારા જુદી કરવામાં આવી છે
 |-
 | 5:27
-| Use the IPython help to see how to do this.
+| આ એવી રીતે કરવું તે જોવા માટે આઈપાયથનની મદદ લો.
 |-
 |5:34
-|Switch back to the terminal
+|ટર્મિનલ પર પાછા જાવ
 |-
 |6:54
-|Okay then type print L
+|ઠીક છે ત્યારબાદ ટાઈપ કરો '''print L'''
 |-
@@ Line 171: / Line 174: @@
 |-
 | 6:45
-| This brings us to the end of this tutorial.
+|અહીં આ ટ્યુટોરીયલનો અંત થાય છે.
 |-
 | 6:48
-| In this tutorial, we have learnt to,
+|આ ટ્યુટોરીયલમાં, આપણે શીખ્યા,
 |-
 | 6:51
-| 1. To Read data from files, containing a single column of data using the loadtxt command.
+|૧. '''loadtxt''' આદેશનાં મદદથી ડેટાની એકલ કોલમ ધરાવતી, ફાઈલમાંથી ડેટા વાંચવું
 |-
 | 6:58
-| 2. To Read multiple columns of data, separated by spaces or other delimiters.
+|૨. ડેટાની બહુવિધ કોલમને વાંચવું, જે ખાલી જગ્યાથી અથવા બીજા કોઈ વિભાજકોથી જુદી કરાયી હોય.
 |-
 | 7:04
-| Here are some self assessment questions for you to solve
+| અહીં તમારે ઉકેલવા માટે કેટલાક સ્વ:આકારણી પ્રશ્નો છે
-. loadtxt can read data from a file with one column only. True or False?
 |-
 | 7:18
-| 2. Given a file data.txt with three columns of data separated by spaces, read it into 3 separate simple sequences.
+| ૨. '''data.txt''' ફાઈલ ડેટાની ત્રણ કોલમ સાથે આપી છે જે ખાલી જગ્યા દ્વારા જુદી કરાયેલ છે, તેને ૩ જુદા સાદા અનુક્રમમાં વાંચો.
 |-
 | 7:29
-| 3. Given a file data.txt with three columns of data separated by ":", read it into 3 separate simple sequences.
+| ૩. '''data.txt''' ફાઈલ ડેટાની ત્રણ કોલમ સાથે આપી છે જે '''":"''' દ્વારા જુદી કરાયેલ છે, તેને ૩ જુદા સાદા અનુક્રમમાં વાંચો.
 |-
 | 7:45
-| And now the answers,1. False.
+| અને હવે જવાબ, ૧. '''False'''.
 |-
 | 7:50
-|loadtxt command can read data from files having both single columns as well as multiple columns.
+|'''loadtxt''' આદેશ એકલ કોલમો ઉપરાંત બહુવિધ કોલમો બંનેને ધરાવતી ફાઈલોમાંથી ડેટા વાંચી શકે છે.
 |-
 | 7:58
-| 2. A file with three columns of data separated by spaces to be read into 3 separate sequences, we use the loadtxt command as, x = loadtxt within bracket in double quotes data.txt comma unpack=True
+| ૩. ડેટાની ત્રણ કોલમ સાથે આવેલ ફાઈલ, જે ખાલી જગ્યા દ્વારા જુદી કરાયેલ છે, તેને ૩ જુદા સાદા અનુક્રમમાં વંચાય છે, આપણે '''loadtxt''' આદેશ આપેલ રીતે વાપરીએ છીએ, '''x = loadtxt''' કૌંસમાં બે અવતરણમાં '''data.txt''' અલ્પવિરામ '''unpack=True'''
 |-
 | 8:19
-| 3. If a file with three columns of data separated by delimiters,we read it into three separate sequences by using an additional argument of delimiter in the loadtxt command
+| ૩. જો ડેટાની ત્રણ કોલમ સાથે આવેલ ફાઈલ, વિભાજકો દ્વારા જુદી કરાયેલ છે, તો આપણે તેને '''loadtxt''' આદેશમાં વિભાજકોની વધારાની આર્ગ્યુંમેંટ વાપરીને ત્રણ જુદા સાદા અનુક્રમમાં વાંચીએ છીએ
-x = loadtxt within bracket in double quotes data.txt comma unpack=True comma delimiter=in double quotes semicolon)
 |-
 | 8:51
-| Hope you have enjoyed this tutorial and found it useful.
+|આશા રાખીએ છીએ કે તમે આ ટ્યુટોરીયલનો આનંદ માણ્યો અને તે તમને ઉપયોગી નીવડ્યું હશે.
 |-
 | 8:55
-| Thank you!
+| આભાર!