General :: Getting Numbers From A Line Of Text?
May 10, 2010
I'm working with a rather large file of data taking from a tracking program on my phone, and trying to pull only the longitude and latitude from it. Any given line in the data looks more or less like this:
{"lon":-122.3083848,"time":1.273515839496E9,"source":"skyhook","nap":28,"altitude":0,"name":"location","hpe" :29,"bearing":0,"ncell":0,"lat":47.6544453}
I've run it through this command:
grep skyhook log-2010-05-10_18-17-28.json | cut -d"," -f1,10
to get this:
{"lon":-122.30872015,"lat":47.65812201}
{"lon":-122.3076686,"lat":47.6569975}
{"lon":-122.3079161,"lat":47.656395}
{"lon":-122.3096168,"lat":47.656218}
{"lon":-122.3096285,"lat":47.656206}
Which is a lot nicer, but I would prefer not to have to hand remove the non-number characters by hand since there are thousands of data points. what I could do to get it to just be longitude and latitude in 'number number' format?
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Aug 22, 2011
How can I print Linux command line history without including the line numbers? I want to send it all to a text file like this:history >> history.txt
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Dec 31, 2010
I am looking for a way to search for large numbers in text files and print the nearby lines.
For example if I had a text file like:
Event: 11
blah: 3
blah: 41 bleh: 19
Event: 2
blah: 31
[Code].....
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May 26, 2010
I'm writing a bash script where I read a text file (containing a column of numbers) and store each line in an array. There seem to be some problems with the whole thing however, but only for some files and not others. Here's what I do:
Code:
#!/bin/bash
file=time_notOk.txt ### The file with a column of numbers
i=0 ### Array counter
### Read the file
[Code]....
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Aug 21, 2010
I have huge files, wherein some lines begin with a number. I want to convert that number to a bookmark link
Sample file:
Code:
C.S. Lewis (I think) wrote:
1 If war is ever
2 legal, then peace
3 is sometimes
4 sinful.
Text without numbers toom I need the numbers to be <a name tags where the id is the letter x and the number that is at the beginning of the line:
Code:
C.S. Lewis (I think) wrote:
<a name="x1">1</a> If war is ever
<a name="x2">2</a> legal, then peace
<a name="x3">3</a> is sometimes
<a name="x4">4</a> sinful.
Text without numbers too I'm not sure why I can't get this, but after hours of 3 line long seds and endless while read lines, grepping ^[[:digits:]]s I can't figure it out.
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Mar 21, 2011
This solution works but is slow with large files. I am looking for a faster solution.
The 2 files contain filenames, one of them has associated data I want to append to the other file's matching filenames
file1:
file2:
I append file2 by matching the unique_filenames and appending them with the tag data and some formatting
appended file2:
Here is the SLOW code
while read inputline.
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May 13, 2010
I ran into it while google Segmentation Fault. I'm writing a simple C program that reads a file that counts each line and numbers it then writes to a file called sdout. I copyed my program mostly from the text book but im still having problems. Heres my code:
#include <stdio.h>
#include <stdlib.h>
void new_line(FILE *, FILE *);
int main(char *argv)
[Code]....
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Feb 12, 2011
I wish to move a specified line from a text file:
Quote:
ltoremove=5 #remove 5th line
i=1
while read line ; do
[Code]....
how should this actually be done? is there a shorter faster way to do this?
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Aug 23, 2009
Code:
sed -n '123p' file
that will print line 123 but how might I insert text to a specified line?
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Jan 13, 2010
I have to delete a certain line of text from the a textfile via ubuntu's shell scripting.I have done research, and it seems that most people advocate the usage of sed /d option. sed makes does not edit the text file. Hence, most options I discovered involved the use of a temporary variable/textfile and then overwriting the old file with the temporary new file. Is there anyway whereby I can bypass the use of temporary storage containers? I hope there is any magical combination of commands to edit the file directly.
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Jun 21, 2010
I would like to append text to a file. so i wrote in bashecho text >> file.confHowever it doesnt leave a new line. So i can only do this once. How do i add a new line?
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Nov 30, 2010
I am looking at how to add particular text to a file in bash.Here is what I am trying to do:In the /etc/grub.conf file, I am trying to add "audit=1" (without the quotes) to the end of the kernel line...such as:kernel /vmlinuz-2.6.18-194.el5 ro root=LABEL=/1 rhgb quiet audit=1
As there are a few different lines in this file, I am only looking to add the "audit=1" to the above line via a bash script.
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Feb 28, 2011
I have a lot a folders, each named by a number, and in each of these folders I have a specific file (stddev.dat) containing a single line (of numbers) I need to have a single file with each line being one of the stddev.dat (no matter if it is sorted or not), and also I need to add at the begining of each line the number of the folder it comes from.
I 'm no bash expert, and the "add at the begining of the line" is a bit of problem to me". Here is what I've come up with so far, just to put everything in one file, (and also if you know a better/more elegant way to do the same thing I've done, I'm listening)
[Code]...
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Jan 20, 2011
How can I list the following with grep. I want to extract 2 lines fron a text file The fixed known part if it exists will static text and the text line after it will change.
A sample file
.
.
textline1
[code]....
If the fixed part does Not exist how can I return error code 1
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May 3, 2010
a sed command to add a text before line number in text file? I have text file with 500 lines, and i want to add 3 more lines with text after line 300, OR before line 302, isn't no problem.
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Sep 12, 2010
I currently have 3 files with floating point data that I wish to have in a single file with the format:
Code:
F1 F1 F3 Output
a1 b1 c1 a1 b1 c1
a2 b2 c2 a2 b2 c2
a3 b3 c3 a3 b3 c3
a4 b4 c4 a4 b4 c4
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Oct 18, 2010
I have two txt files containing x and y coordinates: xcoord.txt & ycoord.txt. I need to open them; read them line by line to get each coordinate; then each time I need to update Xs and Ys parameters inside another file called "dc.in" with the grabbed values.
Finally each time I need to run two exe files ( dc_2002 and st_vac) and produce corresponding output for each Xs and Ys ( dc.in is an input file for this exe files)
I have written the following code but it does not work:
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Apr 1, 2009
Was wondering if any perl guru's could help me with a quick log file adjustment. I have a text file that looks like so (tabs and newlines are revealed so you can see what separates the data):
There are maybe 100 lines of text in this file at any given time. I need to delete all duplicate lines only looking at the first bit of text prior to the first tab. It doesn't matter which one gets deleted as long as there are no two lines that begin with that same text at the beginning before the first tab. So in this example, either the fist line "1234" or the last line "1234" would need to be deleted. I already have code in my script that opens the files - I just need the code to read the text into an array and the part that would find matches based on the above criteria, and make the deletions.
If it would be easier, I can even do a system call and use SED (v4.1.5) and/or AWK (3.1.5) instead.
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Jul 7, 2011
bash 3.1.17(2) I'm trying do write a shell script which must operate on each line of an ASCII text file. So, all the code must be inside a loop, and inside the loop, the first thing should be to read the next line from the file. I have the bash read command. But it reads from stdin. Any way to make read from a file?
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Jul 6, 2010
I'm a bit new to Python programming and hoped that someone might be able to help with a problem I'm having. What I essentially want to do is to combine two text files line for line. I know how to do this in a bash script so to give you a better idea here's the code for that:
Code:
This is basically for adding on values to the end of a CSV file that uses ';' as the delimiter. So say file1 said:
And file2 said:
Then running this command would create merged_file1_and_file2 which would be:
The code I'm using at the moment is:
Code:
As I'm sure any experienced python programmer will see, this prints out the first line of the file "csvraw" and then all of the lines of "stamps" and then the remainder of "csvraw".
What I'd like to do is something like: (pseudo code, I know it's not python ;-))
Code:
Is this possible? I've tried googling and my Python Pocket Reference hasn't been much help. I've looked at pickling but that doesn't seem appropriate.
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May 2, 2010
I have huge text files with two fields, the first is a string the second is an integer. The files are sorted by the first field. What I'd like to get in the output is one line per unique string and the sum of the numbers for the identical strings. Some strings appear only once while other appear multiple times. Given the sample data below, for the string glehnia I'd like to get 10+22=32 in the result. how to do this either with gnuwin32 command line tools or in linux shell?
[Code]...
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Nov 25, 2010
How can I replace one instance of a word in a text file with a piece of text that spreads several lines ? I know sed or awk is the way to go but don't know that how I can introduce new paragraphs using these tools
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Oct 24, 2010
I want a command line tool that echoes a string in ASCII art way, like here.
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Oct 4, 2010
I want to insert the text "DB dept" in the last line of passwd file which looks like this right now
Quote:
newuser:x:717:717::/home/sacharje:/bin/bash
And I want it to be like this:
Quote:
newuser:x:717:717: DB dept:/home/sacharje:/bin/bash
I tried to do that with sed but failed, I'd like to know the proper syntex with sed to achieve this.
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Apr 1, 2011
my webpage PHP below. I would like to enter "Hello, in the main inputbox field" below (You are editing: textfile.txt) and click "SAVE" directly from command line.
Sort of : wput_php "hello, in the main inputbox field" click save, and here is it. the text would be uploaded.
PHP Code:
[Code]....
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Jan 28, 2010
I need to be able to edit a file from the commend line as I intend to script this operation, the file is called menu.lst The original is as below
Code:
titleUbuntu 8.04.3 LTS, kernel 2.6.24-24-generic
root(hd0,0)
kernel/boot/vmlinuz-2.6.24-24-generic root=UUID=b09feb23-5524-4ec4-862f-94700b968f64 ro quiet splash
[code]....
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May 20, 2010
I have large text files with space delimited strings (2-5). The strings can contain "'" or "-". I'd like to replace say the second space with a pipe. What's the best way to go?
Using sed I was thinking of this:
sed -r 's/(^[a-z'-]+ [a-z'-]+) /1|/' filename.txt
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Sep 21, 2009
I have a utility that works with files. The utility is crashing at after about 120 files. The input to the utility is a file containing a filelist. I want to cut the file with the file names in it to seperate files containing about one hundred or so. My thought was to determine the number of lines/100 and then use head and delete to create temporary files to run the utility multiple times to prevent the crash. When I tried to create a variable using the wc -l command the output gives me the number of total lines but it also includes the filename of the input file. (873 Filename.txt) I can not figure out how to remove the Filename.txt from the variable.
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Sep 22, 2011
I'd like to print only few groups from text matching a regex. How can I do that in the Linux command line?
What other tools for text processing are there in Linux?
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Jul 29, 2011
I don't understand why this is so difficult.In the old days, there was lpforms which allowed some formatting. CUPS did not see fit to implement this into it's lp package.cgi-...-cgi?lpforms+1In the old days, lpr allowed you to select a font in the command line with -1=fontname. CUPS did not see fit to implement this into it's lpr package.htmIn the old days, printers had fonts installed on them that you could access. Modern printers don't seem to have this. So now I still need to be able to select a font when I print certain text files from the command line but it seems this is impossible. I've been working with instances and lpoptions, which allows me to do a lot of other things I need like orientation and margins and even set the font size, but I still cannot choose a font other than the default.
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