Dmitri, QSAS ( http://www.sp.ph.ic.ac.uk/csc-web/QSAS ) will do nearly everything you describe, although it may be an overkill for you in some respects. It is also open source so that if you wanted to add some features you could (in principle). While it's targeted at time-series data, it also works perfectly well with other data. Other aspects that might interest you (or might not) include being able to manipulate the data including passing it through your own "plugin" modules to generate new data products. The plotting is fully interactive and you can easily select regions and zoom in, select ranges and save the X and/or Y limits, etc. There is the ability to label things, but not with the value of the data point.
To get data into qsas requires the writing of a suitable header to describe it. This is pretty easy; if you sent us a sample data file and told us what the columns were I could one for you. You might find that qsas is more than you need (likely, at least in some respects), and that it is sufficiently large that modifying it or writing plugins presents you with a steeper learning curve than you wish, but it might at least be worth trying to install it and play with the sample data that comes with it to see what it will do. Regards, Steve On Wed, 2009-06-17 at 20:08 +0100, Dmitri Gribenko wrote: > Hi all, > > I'm thinking about writing an interactive data plotting application > with plplot. Data is ngspice simulation results. I want it to be an > easy-to-use application tailored for ngspice with features useful when > exploring circuit simulation results. > > I'm writing to the list to get some advice about implementation > details of the features. > > Some of the features I want to implement are easy with plplot > (multiple subpages, Bode plots). But I want to ask your advice about > implementing some other features, specifically: > * zoom in/out; > * scrolling when zoomed plot doesn't fit into the window. > > As far as I have found from documentation, there is no built-in > support for zoom. (Well, there is plsdiplt(), but it zooms the whole > plot. I want to zoom into data, leaving axes where they were.) > Nevertheless, zoom should be easy to implement with just re-plotting > the "visible" part of the data array. > > The most important feature that I miss in other data plotting > applications (and the reason to write my own) is the ability to make > measurements on the plot. That is, I want the user to be able to pick > data points on the plot to implement the following features: > * place a label on the plot with the actual data for the point; > * find the distance on X and Y axes between two points. > > Here's a quick mockup of what I want: > http://img29.imageshack.us/img29/5403/plplot.png > > The problem with plGetCursor() is that it receives the event itself. > If I create the window myself with GTK or Qt, then my code will > receive the event. After reading the source, it seems that > plTranslateCursor() should do the task. > > Can you suggest what driver should I use? I think about using GTK and > extcairo. But in future I want to port the application to Windows. > Should a Qt application be easier to port than a GTK one? > > Regards, > Dmitri Gribenko > -- +-------------------------------------------------------------------+ Professor Steven J Schwartz Phone: +44-(0)20-7594-7660 Head, Space & Atmospheric Physics Fax: +44-(0)20-7594-7900 The Blackett Laboratory E-mail: s.schwa...@imperial.ac.uk Imperial College London Office: Huxley 711A London SW7 2AZ, U.K. Web: www.sp.ph.ic.ac.uk/~sjs +-------------------------------------------------------------------+ ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
