How to remove password from password protected pdf files

There are free tools available in the market to remove password from protected pdfs. One simple and easy way to remove password is using chrome.

• Drag and drop your protected document on to chrome browser. 
• Enter the password and open it. 
• Print the document. 
• Selection option as 'Save PDF'. 

Done..

Extract Column Wise Data From A Text File

In general if you want to copy or cut data from a text file we can just drag it by mouse or we can use CTRL+C or CTRL+X. But this works only for row level. Some times we need to extract column wise. For example in an experiment we got text file in which we don't want some columns or if we copy some source code from internet it may consists unwanted number line.

In such cases let me tell the simplest technique to get data column wise data from a text file. For this we need a small software called notepad++. Now-a-days this is a very popular software and every body is having this. If you don't have this software download here.

Steps to extract data:

Step 1: Open your text file in notepad++ (Or you can just drag and drop on to nodepad++)
Step 2: Keep your cursor at the starting point of the column which ever you want to extract/cut hold ALT button and drag it.
Step 3: Copy/Cut the data and Paste it in a new file.


Method : 2
If you have Microsoft word, then copy your text and paste in MS-Word. Hold ALT + left key, drag and copy text. It is the easiest and simple technique. 





Method : 3
If you have eclipse, open file in eclipse and hold press Alt+Shift+A, then editor turns into block editor, now select empty block that you want to delete and delete it.
Done

How To Extract Data From a Graph(.JPEG, TIF...etc ) Using MATLAB Grabit file

Step 1: First download grabit.m (Click on below link to download grabit.zip file and extract zip file to get grabit.m file)
http://www.mathworks.com/matlabcentral/fileexchange/7173-grabit?controller=file_infos&download=true

 or

 http://www.ziddu.com/download/13760907/grabit.zip.htm

Step 2: Copy the grabit.m file in your current directory. In case of windows users better to copy the file in
C:\Documents and Settings\CURRENT_USERNAME\my Documents\Matlab

(replace red colored text by system username)

 Now I am going to extract data from the following graph. You can use your own graph from which data to be extract.

Step 3: After copying the grabit.m file, type grabit in matlab command window, then you will see a screen like this

Click on Load Image

And load the graph from which you want to extract data

Then below load image button , there is a button called calibrate, click on calibrate button,

Click on x axis near the origin and enter a value for a minimum of x, after that click far away from the origin on x axis and enter for a maximum value of x. 
Do the same job for y axis also...

 

Now start grabbing points from the graph by click on graph carefully. You can also view the preview of the collected points in the upper rightmost side. 

After completion of grabbing points, then click on grabbing points button,

Finally in the right side panel, you can find a file with name ' Data001 '. This is the required file. You can save data as text file(.txt) or matlab file(.m) by clicking save as... button . 

All shortcuts will be shown in the editor only:

a--> zoom in 

z--> zoom out

space-->reset view

backspace or del--> to delete previous point

enter--> to finish 

You can also view a sample video for this...

 

Cheers.....
 Gangadhar

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