How do I plot several data sets in a single file ?
In order to plot several data those are stored in one file, use using and index.Here, 'data' means a set of XY pairs. Gnuplot draws one line orprints the same symbol at each for a set of data points in ageneral meaning, and this is different from the gnuplot's definitionof 'datablock'. The datablock in gnuplot is a set of data pointsseparated by a single blank line.)
As you can see above, all the data in the different data blocksare drawn by the same line/symbol type. Adobe illustrator 2020 v24 0 2 for mac free download. To make them different,specify a data block by index .The first data block has an index of zero, the second is one, and soon.
You can specify the range of index. Jump desktop 8 2 16. For example, to use the samesymbol for the first and second blocks, and change the symbol for thethird block:
I want to modify values in my data file when plotting.
You can make some simple calculations and change the data of thecolumn which is specified by the using option.With the following data we show fourcases simultaneously --- Y-values themselves, Y-values are doubled,squared, and logarithm is taken.
Specify the n-th column by $n , and make someoperation. The expression should be put into parenthesis. Anexpression like using 1:sqrt($2) does not work. You canalso make some calculations which need several columns. Forexample, using 1:2:($2*$3) makes a product of the second andthird columns.
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Sometimes this technique is useful when you have a data filewhich contains Y-value uncertainties, and the uncertainties arerepresented by a relative error (%). To draw error bars yourdata uncertainties should be absolute. To convert from relativeuncertainties into absolute ones, using 1:2:($2*$3/100.0),where the second column is the Y-data, and the third column is thepercent errors.
I want to put some plotting commands in a data file.
Gnuplot uses two files, one is the data and another is the controlcommand. If your data are not so complicated, you can put the plotcommand into one file together with the data themselves. Basically itis the same as a usual command file, but the data file to be plottedis not an external one but it is just '-', and the numerical datafollow. Gnuplot stops reading the data when a line begins with theletter 'e'.
Prepare a control file which includes the data just like above,and give the name as a command line option when gnuplot isinvoked.
By the way, you cannot use the replot command in thismethod. Gnuplot tries to read the data from the standard inputagain, because Gnuplot does not remember the data.
I want to eliminate some data points.
There are two ways to skip some data in a data file -- the firstone is to edit the data file, alternatively you can use the every option. To skip some points in your data by editing the data file, put someletter like '?' just before the number. This letter is defined by the set missing command, but anykinds of letters which cannot be converted into numbers work too.
The next example is to draw graphs of (X,Y1) and (X,Y2).
test1.dat | test2.dat |
In the left drawing, the second X value has '?' mark, so thatthe second data points (2.0,1.8) and (2.0,0.8) are skipped. In theright drawing, the point (2.0,1.8) still is alive, but(2.0,0.8) is erased.
This function is useful if you want to alter the rangeof plot in a table formatted data. Let's plot the following datain log-scale, the second (Y1) and the third (Y2) columns areplotted simultaneously.
The Y1-values are zero in the X range of [1:3], so you cannottake log here. Gnuplot produces a vertical line at the lowestpoint which has a positive value (here, that is X=4).
To remove this vertical line, put '?' at Y1=0.0, like '?0.0'.Then the Y1 data (the red line) are treated as that they begin at X=4.The same thing you can do with the plot command option every ::3 . See the next topic.
How do I plot a part of data in a file ?
To specify a range of the data to be plotted, use the every option in the plot command. To skip every two lines, say plot 'test.dat' every 2
. When the data file contains several data blocks those are separatedby a single blank line, you can skip the data block by the every option. To skip every two block, try plot'test.dat' every :2
.every I:J:K:L:M:N |
| ||||||||||||
every 2 | plot every 2 line | ||||||||||||
every ::3 | plot from the 3-rd lines | ||||||||||||
every ::3::5 | plot from the 3-rd to 5-th lines | ||||||||||||
every ::0::0 | plot the first line only | ||||||||||||
every 2::::6 | plot the 1,3,5,7-th lines | ||||||||||||
every :2 | plot every 2 data block | ||||||||||||
every :::5::8 | plot from 5-th to 8-th data blocks |
Alternatively (if you are on the UNIX-like system),a part of your data file can be plotted by using the unix commands, 'head' and 'tail'. Squidoo v1 0 9 download free.
The first 'plot' command says to plot the first 10 lines in thedata file 'test.dat', and the second 'plot' means to show the last 3lines in the data file. The next lines are an example to draw a graphof the data file 'test.dat' --- the first 5 points are shown by lines,and the last 5 points are by symbols.
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Nov 10, 2005 - Easy File Sharing Web Server 3.1 released. Incorporate with Easy Chat Server, it will let users log into chat rooms directly. Send notification email to specified email address when users register a new account. Send notification email to specified email address when users reply topics and upload files. Support for limiting max size of uploaded file. Support PKCS7 format certificate for SSL Server. Locked topics support. |
Jul 27, 2005 - Easy File Sharing Web Server 3.0 released. Avatar support. Sticky Topics support. Download/upload speed limitation support for guest. Support for changing thumbnail size. Support for displaying the files/folders in thumbnail view by default. |
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Nov 25, 2004 - Easy File Sharing Web Server 2.5 released. Provide a Free Dynamic DNS Service for Dynamic IP address users. Add an option to disable the new user account until admin active it. Add a right-click menu to the users list to export/import all the user accounts. |
Oct 23, 2004 - Easy File Sharing Web Server 2.1 released. Add a search engine for virtual folders. Add more templates. Fixed a bug when send email, support more SMTP Authentication method. |
Sep 16, 2004 - Easy File Sharing Web Server 2.0 released. Add a Secure web server, support both http and https. Integrated 128-bits SSL Support. Generating Server certificate and Certificate Signing Request for CA. |
May 9, 2004 - Easy File Sharing Web Server 1.25 released. support user to upload multiple files at a time. the most recently modified topic will jump to the top of the list. fixed a bug when the files can't be deleted if it remained in use. fixed a bug when browse with Mozilla Firefox. |
March 3, 2004 - Easy File Sharing Web Server 1.24 released. Remote Administrator can delete the files that were uploaded by other users. Switch the sort order of the file list between ascending and descending. Posting images by using the tag [IMG]imageURL[/IMG] in forums. Fixed a bug when open a Word/Excel file with IE6. |
February 24, 2004 disk quota for virtual folders. create new virtual folder automatically for new account. view online users on web page. remote admin (only user admin is available). flash the tray icon when new user login. |
December 8, 2003 - Easy File Sharing Web Server 1.23 released. new: enable the program to create sub-folders in virtual folders. new: hide forums from other users if they do not have permission to the forum. new: change how you view files in a folder, thumbnail or list/detail. new: sort files/folders by categories such as date, name, size and type. new: thumbnail generation for JPEG files when you browse the virtual folder. new: login to virtual folder by default. new: delete/edit message. |
November 17, 2003 new: hide other user's virtual folder. new: detect links posted in messages and make them to be clickable. new: supports users to delete files they uploaded. new: disable guest login new: disable guest registration. |
October 12, 2003 fixed all the vulnerabilities, more security. fixed: fixed a vulnerability allows remote user to view the log files. fixed: fixed a vulnerability allows remote user to view the option.ini file. |
October 9, 2003 - Easy File Sharing Web Server 1.21 released. support double byte filename. support uploading files to a forum thread. |
September 22, 2003 new: can be run as a Windows NT service. |
September 16, 2003 fixed several bugs, more security. fixed: Fixed security vulnerability (Directory Traversal Bugs). fixed: HTML Injection. new: add/edit any file extensions icon. new: show gif/bmp files directly in forums. |
August 28, 2003 new: multi-thread downloading with resuming capability. new: hide system files and hidden files. |
August 18, 2003 - Easy File Sharing Web Server 1.2 released. IP Filter support. Templating system support. |
August 2, 2003 - Easy File Sharing Web Server 1.0 released. |
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