http://www.dplot.com DPlot Graph Software for Scientists and Engineers Sun, 11 May 2008 22:50:00 GMT en-us Copyright 2001-2008 HydeSoft Computing, LLC. David Hyde admin@dplot.com http://www.dplot.com/logo_small.png http://www.dplot.com 141 45 Graph Software for Scientists and Engineers http://www.dplot.com/revisions.htm#R2168

12 May, 2008
Version 2.1.6.8

• Box-and-whisker plots and dot graphs may now have a logarithmic scale. Scaling may be set programmatically with the new Stat_Scaling macro/DDE command.
   
• For XY plots, if you copy/paste a curve into the same document then the new curve's legend will be "Copy of <source legend>", or "Copy of Curve x" if the source curve has no legend entry.
   
• Increased the maximum number of reference lines from 50 to 100. (This was needed for a user plugging in many reference lines in place of grid lines at desired locations different than those chosen by DPlot. New options for grid lines will be coming soon.)
   
• Bug fix: The legend in 2D contour plots might have been clipped when saving a bitmap image and/or copying a bitmap to the Clipboard.
   
• Bug fix: An error in processing Campbell Scientific datalogger files might have resulted in overwriting another area in memory, causing later unpredictable behavior. In the last DPlot update this might have resulted in a false positive when testing for a pirated version of DPlot.
   

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2 May, 2008
Version 2.1.6.7

• Probability scales may now range from 0-1 instead of the default 0-100. Among other things, this allows you to use Percent number formatting on a probability scale. Amended ProbabilityFlags macro/DDE command to take account of this option.
   
• For Bubble plots, the mouse hover tooltip gadget now shows the bubble magnitude as "Z=" in addition to the X and Y values.
   
• The maximum number of decimal places on the Number Formats dialog has been increased from 8 to 12.
   
• Slightly modified the way Scan X,Y works: if the Shift key is pressed, then clicking on the scroll bar arrows or using the arrow keys moves 10x whatever the current increment is.
   
• Increased the maximum number of plugin modules (Generate, File Import, or File Export) from 20 to 50. This will primarily be of interest to those developing their own plugins for DPlot.
   
• Added a placeholder for macro/DDE commands to specify a curve or data set by entering one or more substrings from the legend associated with that curve or data set. (See the description of the SelectCurve command.) For example [SelectCurve(LegendHas("ABC","DEF"))] will select the first curve whose legend contains both ABC and DEF. LegendHas may be used in any command in place of a curve index. If the search fails, no replacement is made (which will subsequently result in an error message when attempting to interpret LegendHas("substring") as a number). Thanks to Ian from Tata Motors for the suggestion.
   
• You may now resize a 2D plot by dragging any corner of the plot (in addition to using Specify Plot Size). When sized using this method, Specify Plot Size is turned on if not previously on. The size will be rounded to the nearest tenth inch, millimeter, or centimeter, depending on the default measurement units selected under Options>General. Dimensions might be subject to the constraints of the plot type: triangle plots will always be an equilateral triangle, Mercator projections will retain the correct shape, etc.
   
• Bug fix: Very long line segments on XY plots (made very long by zooming in or setting the plot extents to a small fraction of the data extents) might not have been clipped properly. In this release DPlot relies on its own internal clipping rather than using Windows' built-in clipping algorithm if the plot extents are less than 1/20 of the full extents of the data, in either direction.
   
• Bug fix: If "Axes only" was used for the grid type on an XY plot, in metafiles the arrowheads on the axes might have been clipped.
   
• Bug fix: The function parser (used in Y=f(X) and similar commands) might have erroneously returned a "Too many parameters" error for functions of more than two arguments in which the last argument was another function, e.g. NORMDIST(x,0,SQRT(0.2)).
   

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9 April, 2008
Version 2.1.6.6

• Preference files will now include line styles, symbol styles, line widths, and symbol sizes for all curves. Previous versions only stored this data for the first 20 curves.
   
• Spin buttons throughout DPlot are now forced to the designed width. In previous versions spin button width was set to the width of a standard scrollbar (user-settable with Control Panel). This led, in some cases, to overlapping controls if you increased the scrollbar width above the default value.
   
• Looks only: DPlot now uses the look of XP-specific common controls (buttons, checkboxes, etc.) on XP and Vista. Welcome to 2003 :-)
   
• Bug fix: A saved DPlot file containing XY data might have erroneously saved the data as if the X axis had equally-spaced values if at any time the data did have a constant spacing but you then used Delete Points in Box to delete one or more values before saving the file.
   
• Bug fix: A roundoff error might have resulted in symbols being 1 pixel off on logarithmic scales. This was generally most noticeable with symbols using crossed lines.
   
• Bug fix: List Peaks might have crashed with 3D data.
   
• Bug fix: If Data points was checked on the Contour Options dialog for randomly-spaced 3D data, symbols were drawn at each point regardless of whether that point lie outside extents set with the Extents/Intervals/Size command.
   

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27 March, 2008
Version 2.1.6.5

• DPlot will now correctly handle blank entries in CSV files for "quoted" values (date and time combinations, for example). In previous versions blank quoted entries were only handled correctly if represented by two consecutive quotation marks; for two consecutive delimiters (commas or tabs) in place of a quoted value, DPlot would have stopped processing the file at that point, deciding that the data type for that column didn't match the corresponding column in previous lines.
   

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23 March, 2008
Version 2.1.6.4

• Corrected two problems with DPlot's FFT routine that have been present from the start: a) The first point in the FFT should be equal to any offset from zero in the input record. This value was off by a factor of 2. b) For an input number of points equal to a power of 2, the output FFT was normalized by dividing by N, when it should have been divided by N-1.
   

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21 March, 2008
Version 2.1.6.3

• Bug fix: It was possible to cause an integer overflow (crashing DPlot) with the Y=f(X) and similar commands if the range in values divided by the selected interval was greater than 2^31. This problem has actually been present for years, but was made much more apparent by the recent change of dynamically showing the number of points that would be generated by the given extents and interval.
   

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18 March, 2008
Version 2.1.6.2

• A change in version 2.1.6.0 to remember the Pick Columns to Plot setting caused DPlot to display the Specify Columns to Plot dialog when opening a file on the command line. In this release files opened by a command line operation will not display that dialog, regardless of whether that option was previously selected.
   
• Bug fix: If you clipped the Z extents of a 3D view using Extents/Intervals/Size and elected to draw grid lines on the surface, in rare cases an integer overflow might have caused DPlot to crash, particularly when rendering to a high resolution device like a printer.
   
• Bug fix: The Multiple option on the Print dialog might have crashed DPlot the first time you selected "Select All" due to an uninitialized data problem.
   

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12 March, 2008
Version 2.1.6.1

• Bug fix: A recent change meant to improve on DPlot's default tick mark intervals might have resulted in a crash if Specify extents was checked and the lower limit was a negative value with a larger magnitude than the positive upper limit.
   
• Bug fix: Bar charts were not drawn properly to enhanced or standard metafiles if you zoomed in on the graph or set the extents of the plot to some subset of the entire data. This bug effected both metafiles copied to the Clipboard and saved files.
   
• The Y=f(X) command now presents the from X and to X values using the current number formatting for the X axis. (Previously, these values always used the default number scheme). Previous values used in this command will be displayed using more significant figures than in previous versions (Date and Time, for example, will show times down to microseconds when appropriate). And the dialog now shows the number of points that will be generated using the from X, to X, and with interval dX settings. This functionality will be added to the other curve/surface generating commands in a future release.
   

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6 March, 2008
Version 2.1.6.0

• Amended the BMP, GIF, PNG, and TIF file export modules to optionally use a better color quantization routine when saving 8-bit images from displays with greater than 8-bit color depth (which, these days, is just about everybody). The default color quantization method does not work well in some cases when saving an image with a colored background. The optional method works much better but comes with a performance penalty, taking several seconds for large images. Modified the SetPluginImageDims macro/DDE command to include this new option.
   
• In most all dialog boxes that include lists of curves, the list entries now include a short line segment and/or symbol in the appropriate color. This change makes it a bit easier to quickly pick the desired curve from a list, particularly when the curve has no legend entry.
   
• DPlot does a better job handling calendar date number formats on 3D/4D surface plots. In previous versions these numbers were treated the same internally as all other number formats, so that it usually wasn't possible to get, for example, grid lines or tick marks at exact 1 month or 1 year intervals.
   
• Expanded the list of built-in date formats in the Number Formats dialog from 7 to 24 of the most commonly used formats. As before, you may select a format from the list or enter your own format.
   
• Added an option to not draw an inverted scale on the opposite side of the plot from a probability scale. The default is to draw that inverted scale. Added ProbabilityFlags macro/DDE command to set these options.
   
• Improved on version 2.1.5.5's change in the behavior of the Force circular plots option for polar plots. In version 2.1.5.5 the size was set to roughly 80% of the minimum of the document window width and height. This worked well for most display sizes, but not larger resolutions (unless you used very large fonts). In this version DPlot will use all available display space.
   
• The "Pick columns to plot" option for CSV and other multi-column text files is now turned on by default, and your choice for that option will be preserved. In previous versions this option was always initially turned off.
   
• Bug fix: If Outline solid symbols was checked, then symbols from the Wingdings 2 font were drawn in black.

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18 February, 2008
Version 2.1.5.8

• Bug fix: An obscure problem was introduced in version 2.1.5.6 that resulted in strange problems (toolbar bitmaps disappearing, all lines being drawn with a single-pixel black line, and other assorted weirdness) after saving several thousand bitmap images. Thanks to Sven Henze for the assist in tracking this down.

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17 February, 2008
Version 2.1.5.7

• You can now specify the background color of the entire plot, the legend, text notations and point labels. Past versions always used the Windows' window background color. Added new BkColor macro/DDE command and modified the LegendParams, TextNoteEx, TextNote3D, TextPointLabel and TextPointLabel3D macro/DDE commands to take this new capability into account.
   
• Bug fix: Retrieving a DPLOT_PLOTMETRICS structure with DPlot_GetBitmapEx or DPlot_GetPlotMetrics was broken in version 2.1.5.6.
   
• Bug fix: If you did not install the Excel Add-In, the uninstall program for DPlot might have produced an Excel runtime error and then shut down.
   

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