data-files

问题 So, I am (well... I was) running PostgreSQL within a container (Ubuntu 14.04LTS with all the recent updates, back-end storage is "dir" because of convince). To cut the long story short, the container folder got deleted. Following the use of extundelete and ext4magic, I have managed to extract some of the database physical files (it appears as if most of the files are there... but not 100% sure if and what is missing). I have two copies of the database files. One from 9.5.3 (which appears to

问题 I have a data file with 100 columns and thousands of rows, but I want to be able to select one single row, and in that row, use the even columns as the inputs for the X-axis and the odd columns as inputs for the Y-axis for a plot. Is there any way I can do that in gnuplot? 回答1: So here the script I've done to plot a given line from a given data file with odd column as x-axis and even column as y-axis. #!/usr/bin/gnuplot set term pdf set output "plot.pdf" line_number=1 data_file="data.dat" set

问题 When adding a .MDF ( .NDF ) or .LDF file to a SQL Server, we have the option to set its initial size, auto-growth, and incremental (percent or absolute). After the database is in operation for a while, is it possible find how much of the actual size is used by the data? For example, if the actual size of the file is 5M, but only 2M is used to store the data, the file can still take 3M of data before it needs to grow. I need a way to find out the "2M" (used size) in the total current size (5M)

问题 When adding a .MDF ( .NDF ) or .LDF file to a SQL Server, we have the option to set its initial size, auto-growth, and incremental (percent or absolute). After the database is in operation for a while, is it possible find how much of the actual size is used by the data? For example, if the actual size of the file is 5M, but only 2M is used to store the data, the file can still take 3M of data before it needs to grow. I need a way to find out the "2M" (used size) in the total current size (5M)

问题 When adding a .MDF ( .NDF ) or .LDF file to a SQL Server, we have the option to set its initial size, auto-growth, and incremental (percent or absolute). After the database is in operation for a while, is it possible find how much of the actual size is used by the data? For example, if the actual size of the file is 5M, but only 2M is used to store the data, the file can still take 3M of data before it needs to grow. I need a way to find out the "2M" (used size) in the total current size (5M)

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I would like to run C code in C++, using Xcode 8.33 on MacOS Sierra 10.12. I am new to C/C++, compilers, etc so please bear with me. The C code, when compiled and ran with make via Terminal, works. But when I throw all the same files into a XCode C++ project, there is an error with the data file. Note: I did

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I would like to run C code in C++, using Xcode 8.33 on MacOS Sierra 10.12. I am new to C/C++, compilers, etc so please bear with me. The C code, when compiled and ran with make via Terminal, works. But when I throw all the same files into a XCode C++ project, there is an error with the data file. Note: I did

问题 I am trying to get the next line of data tag file, however because there are multiple lines with the same tag it is going through and taking the last one but I need the first one. Example tag file below. Summary SA2100|7775555 Summary SUM100|9674555 Summary SUM100|8544555 Summary SUM100|8555554 From this it is taking 8555554 and not 7775555. I was trying to put the first line in the if condition and set the string to be the next line is this possible ? if Left(strLine, 14) = "Summary SA2100"

问题 How can I read a datafile as-is (or 1:1) into a datablock? And how could I do this platform independently? My attempt so far: ### load datafile "as is" into datablock for different platforms FILE = 'Test.dat' if (GPVAL_SYSNAME[:7] eq "Windows") { # "Windows_NT-6.1" is shown on a Win7 system load "< echo $Data ^<^<EOD & type ".FILE } if (GPVAL_SYSNAME eq "Linux") { # that's shown on a Raspberry load '< echo "\$Data << EOD" & cat '.FILE } if (GPVAL_SYSNAME eq "Darwin") { # this was shown on a

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . I need to read a data file in which numbers are written in a format like this: 1.0d-05 C++ doesn't seem to recognize this type of scientific notation! Any ideas on how I could read/convert those types of numbers? I need numbers (i.e. double / float ) not strings. Maybe there is already a class /