I need to parse a log file that consist in many screenshot of real-time OS stdout.
In particular, every section of my log_file.txt is a text version of what appear on screen. In this machine there's not monitor, so the stdout is written on a downloadable log_file.txt.
The aim would be to create a .csv of this file for data mining purpose but I'm still wondering what could be the best method to compute this file.
I would the first csv file line with the description (string) of the value and from the second line I would the respective values (int).
I was thinking about a parser generator (JavaCC, ANTLR, etc..) but before starting with them I would get some opinions.
Thank you.
P.S.
I put a short version of my log at the following link: pastebin.com/r9t3PEgb
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I have got a trace file that is binary in nature. I want to convert it to a text file and convert the data inside it to decimal form. I mean I am not sure, how to do this. This .trc file contains data in the form of telegrams and I want to extract particular kind of telegram and save them in text file which is readable in nature. I have to do all of this using C++.
Do you suggest any other language for it or does anyone has any idea about doing this in C++?
Binary trace files are usually encoded in proprietary formats. And there are applications or profilers specifically built to parse them.
Unless you know the file format, the only way to decode it is through reverse engineering. And in most cases it's not worth the effort.
Try to find documentation about it. Or maybe an application or utility that loads the file and exports data that is easier to read.
In case you are speaking about .trc binary files from Teledyne Lecroy Oscilloscopes, I would suggest to any of the following libraries out there for that:
https://pypi.org/project/lecroyparser/
https://github.com/jneer/lecroy-reader
https://github.com/yetifrisstlama/readTrc
https://igit.ific.uv.es/ferhue/lecroyparser
I am working with open source package written in python.
Its output is a file with .sww format.
I am unable to find a software which can read this.
Please kindly reply if you know.
Thank you
this is picture of the file icon
It's time to answer my own question.
SWW file format is a NetCDF format for storing model output with mesh information f(t,x,y).
One such use of SWW file extension is
In ANUGA, a hydrodynamic modelling. It's used for storing the model output and therefore pertains to a set of points and a set of times at which a model is evaluated.
The contents of an SWW file may be viewed using the anuga viewer anuga_viewer, which creates an on-screen visualisation.
I was wondering if this can be accomplished using the ifstream library and using only a text file. Basically if I have multiple lines of information, regardless of whether or not they're the same length, would I be able to make my program read a specific line?
For example in the following file:
Bob Professor
Greg Singer Microphone Plane
Ed Runner Sun
If I wanted to read specifically line 2, aka the line starting with "Greg", is there a way to use markers to navigate to that line?
For example, is it possible to get to that line using the fact that it's the only one that starts with "Greg"? Or is there some kind of marker that I can place at some point in the lines to identify it? The desired result would be that so if I wanted to pull up a specific user's information from the text file (in this case, Greg), I'd be able to have the program read the information from that line.
Same thing if for example I wanted to pull up Ed, I'd just want it to read the line with Ed's info.
Any help would be greatly appreciated! Keep in mind, I can only use text files, so using another format is out of the question.
I am a beginner in visual studio and has only code C and C++ in command line settings.
Currently, I am taking a module(software development) which requires me to come up with an expense tracker - a program which helps user tracks his/her daily expenses. Therefore, at the end of each individual day, or after a user uses finishes the program, we would have to perform data storage to store all the info in one place which we would export it during the next usage.
My constraint include not using any relational database(although i have no idea what it is :( ). Data storage must be done using XML or text files. Following this, I have several questions regarding data storage:
1) If data is stored successfully, do we export it everytime we start the program? And everytime after the user closes the program, we overwrite the existing data file and then store it accordingly?
2) I have heard from some people that using text file may be easier. Searching on the internet and library only provides me with information regarding XML and not text. Would anyone be able to help me with it? Like tutorials link and stuff?
Thank you very much!
File writing/handling works similar to every other buffer in c++.
you can enable file handling using the fstream header. You can create a file, write to it and over-write every time the program is run, or can even create a file the first time the program is run and then append to it every subsequent time the program runs.
Ive only ever done text files, never tried XML, but Im guessing they're similar.
http://www.cplusplus.com/doc/tutorial/files/ should give you everything you need to know.
Your choice of XML vs plain text depends on the kind of data that you'll be storing.
The reason why you'll only find XML libraries on the internet is because XML is a lot more complicated than plain text. If you don't know what XML is or if the data that you're storing isn't very complex, then I would suggest going with plain text.
For example, to track expenses, you might store a file like this:
sandwich 5.00
coffee 2.30
soft drink 1.50
...
It's very easy to read/write lines like this to/from a file in C++.
I'm trying to create a reference program which I think will use an excel spreadsheet to hold information for reading only. I want the user to be able to select a topic from an option list and have the information in the appropriate cell be fed back to them. The program is being written in C++. My question is, how do I access specific cells from a spreadsheet from my program? I've researched it a little and I've seen that I want to save my file as a csv and use fscanf to read the contents, but I'm at a loss as to how I would do this part. I googled it and found this thread:
http://www.daniweb.com/software-development/cpp/threads/204808/parsing-a-csv-file-separated-by-semicolons
but I think it reads in all of the data from the CSV? From what I can tell anyways. And I only want to pull specific elements. Is that possible?
If you only want specific elements, you would still have to parse all contents of the file until you reach those elements. You don't have to store values you don't need, but you do need to parse them to advance in the file.
Are you invoking the program from Excel? If you are, a little VBA goes a long way. You could always only export the cells of interest ready for your C++ program to read in.
Otherwise, other answers are correct. However, you don't need to load the entire file into memory at once. You can use std::fstream to open the file and read in each line of the file, parsing in the required information for each line.