Changes in 5.4.1
================
* NEW "with rgbimage" and "with rgbalpha" accept single column ARGB input
* NEW add toggle in toolbar widget for qt terminal option "ctrl-q"
* NEW keyword "smooth kdensity period <val>"
* NEW time format %tD encodes days relative to time 0
* NEW pm3d quadrangles in 2D projection are clipped smoothly to x and y
* CHANGE gif animation 'optimize' option is deprecated Bugs #1992#2070#2348
* CHANGE svg increase coordinate precision to two decimal points Bug #2369
* FIX y autoscaling of default "with filledcurves" #Bug 2294
* FIX placement of mirrored x and y tics in mode 'set view projection ...'
* FIX pm3d lighting calculation for degenerate quadrangles
* FIX botched deprecation of old syntax for "call" arguments Bug #2298#2368
* FIX pm3d "depthorder" affects 'set obj polygon' with >4 vertices Bug #2297
* FIX loss of precision for asin(x), asinh(x) with real x << 0 Bug #2302
* FIX error handling of bad font name in enhanced text Bugs #2303#2308
* FIX incomplete domain for complex acosh(x), real x < -1 was treated as NaN
* FIX error handling of fuzzed input Bugs #2306#2307#2309#2312#2344
* FIX add range check for plot of binned data (allows clipping on y)
* FIX "unzoom" applied to autoscaled volatile data
* FIX no default for binary columns needed if there is a 'using' spec Bug #2315
* FIX buffer overflow of enhanced text fragment Bugs #2310#2311
* FIX qnorm and Hann functions applied in dgrid3d Bugs #2277#2318
* FIX handling of dashtype given as a string with leading whitespace Bug #2336
* FIX preserve key position across isolated instance of "title at x,y" Bug #2342
* FIX contour labels had spurious point symbols
* FIX allow "pointtype variable" in combination with jitter Bug #2354
* FIX cgm: sanity for non-zero font size Bug #2358
* FIX more checks for valid UTF-8 Bugs #2362#2364
The lua option is there to enable the TikZ terminal, so install its
LaTeX style files to make use of it.
Replace and deprecate old "set loadpath" command means the list of font
paths is gone.
Highlights:
* Support for 64-bit integer arithmetic
o All evaluation of expressions and functions uses 64-bit arithmetic
if supported by the hardware platform.
o Integer overflow is detected and handled according to user preference.
* Voxel grids
o Gnuplot now supports operations based on 3D grids of voxel data.
o The current content of one or more voxel grids can be referenced by
splot commands to assign colors or other properties to plot elements.
o Data in a voxel grids can be plotted by splot styles dots, points,
or isosurface.
* Pixmaps as objects
o "set pixmap" allows import of a png/jpeg/gif image as a pixmap that
can be positioned anywhere in a plot or on the page. Unlike plotting
"with image", pixmap objects retain their original aspect ratio and
size independent of axis scaling or rotation.
Example: http://gnuplot.info/demo_5.4/pixmap.html
* New plot styles and plot options
o 3D plot style "with polygons" reads polygon faces from a data file.
These can be used to create a surface or to describe a solid object.
Example: http://gnuplot.info/demo_5.4/polygons.html
o "splot $voxelgrid with isosurface" creates a tessellated 3D surface
enclosing voxels above a requested threshold level.
Example: http://gnuplot.info/demo_5.4/isosurface.html
o "set spiderplot" selects a new plotting mode for creating spider
plots, also known as radar charts. These are essentially parallel
axis plots in which the axes are arranged radially rather than
vertically.
Example: http://gnuplot.info/demo_5.4/spiderplot.html
o Plot styles "with circles" and "with boxes" can be used in 3D plots.
Example: http://gnuplot.info/demo_5.4/3Dboxes.html
o 2D plot style "with arrows" is a variant of "with vectors" in which
each arrow is specified by x:y:length:angle rather than x:y:dx:dy.
o pm3d surfaces can have individual fill styles and separate top/bottom
fill colors.
Example: http://gnuplot.info/demo_5.4/hidden_compare.html
o pm3d option "noclipcb" causes quadrangles with palette color outside
cbrange to be omitted from the plot rather than being assigned a
color clipped to cbmin or cbmax.
o Contour line types can be customized.
Example: http://gnuplot.info/demo_5.4/custom_contours.html
...
pkglint --only "https instead of http" -r -F
With manual adjustments afterwards since pkglint 19.4.4 fixed a few
indentations in unrelated lines.
This mainly affects projects hosted at SourceForce, as well as
freedesktop.org, CTAN and GNU.
Changes in 5.2.8
* CHANGE user-visible GPVAL_TERM_HCHAR GPVAL_TERM_VCHAR (help debug font issues)
* CHANGE placement of ylabel (compromise 5.2.7 and earlier versions)
* CHANGE make strstrt() aware of UTF8, e.g. strstrt("αβγ5", "5") returns 4
* FIX "set timestamp" from "save" must not include a justification
* FIX set cntrparam levels increment <base>, <factor> for logscale z
* FIX character pointtypes should inherit plot coloring like normal pointtypes
* FIX bad autoscaling of linked y2 axis
* FIX prevent infinite loop from unbounded interation in a non-data plot command
* FIX dimensions reported by "stats matrix every"
* FIX extent of boxplot whiskers could be off by one point
* FIX mix unbounded iteration and functions in a single plot command
* FIX reverse history search with readline=builtin
* FIX qt: suppress off-by-one ysize
* FIX cairo: suppress off-by-one ysize
* FIX gd: apply alpha to brushstroke lines
* FIX tikz: fixes to accommodate lua 5.3 and newer pgf
* FIX wxt: ExportToFile widget disabled in persist mode
* FIX qt: handling of modifier keys (ctrl alt shift) for keyboard events
* FIX wxt: handling of modifier keys (ctrl alt shift) for keyboard events
* FIX fig: dashtype "solid" was not passed through correctly to transfig
* FIX gd: incorrect line spacing of multiline label
----
Release Notes date: 29-May-2019
Changes in 5.2.7
================
* NEW "set pm3d noclipcb" will skip drawing quadrangles with color < cbmin
* NEW pm terminal supports utf8, dashed lines, bold/italic text
* NEW imaginary component of array values is available to "using" in column 3
* NEW gnuplot --slow may help use of qt terminal with slow system font server
* CHANGE splot "with points pt 0" acts like "with dots"
* CHANGE (tikz) improved default interpretation of gnuplot arrowhead style
* CHANGE teach hidden3d to handle double-headed vectors (arrowstyle "heads")
* CHANGE "unset title" or "reset" resets all title properties to default
* CHANGE font names passed to enhanced text processing may be in quotes
* CHANGE cairo terminals accept fractional font sizes
* CHANGE "plot with table" does not output trailing field separator
* CHANGE better centering for clustered histograms
* CHANGE clear STATS_* variables before performing analysis
* CHANGE cairo, libgd, and svg terminals handle LT_NODRAW by not drawing at all
* CHANGE svg terminal clickable icons are in-line data rather than external refs
* CHANGE revise space allocated for ylabel; allow text justification for ylabel
* CHANGE reduce overhead, making it feasible to have 10^6 hypertext labels
* FIX "plot with table" unnecessarily limited string column output to 60 chars
* FIX (windows) make sure graph window is shown even if the program is "hidden"
* FIX hidden3d mode was not correctly dealing with arrowstyle backhead
* FIX sprintf in 'using' spec must not clobber numeric locale
* FIX tikz - request for polygon with 0 vertices could hang terminal
* FIX lua/tikz - do not attempt to ftruncate output being piped through stdout
* FIX tkcanvas - do not attempt to ftruncate output being piped through stdout
* FIX handle NaN values in input stream to "stats FOO matrix"
* FIX prevent extra read past the end of a datablock holding matrix data
* FIX pm - issues in box and polygon fill, (wide) lines, enhanced text, images
* FIX dropped character in piped input stream if plot window is manually closed
* FIX extraneous dots and potential segfault from splot with contour labels
* FIX boxplots - color sequence correctly starts with specified linetype
* FIX incomplete initialization led to segfault from "gnuplot -c foo.gp baz"
* FIX Allow "pm3d depthorder base" to handle 3D quadrangles with logscale z
Changes in 5.2.6
NEW keyword "keyentry" places an entry in the key without actually plotting
NEW "set style boxplot medianlinewidth <lw>"
CHANGE drop non-working support for CIE/XYZ color space
CHANGE strptime ignores content read with format a/A/w/W
FIX various corner-case bugs and overruns found by fuzzing
FIX revise waitforinput in x11 terminal
FIX revise waitforinput and terminal close events in qt terminal
FIX revise waitforinput and new window events in monothreaded wxt terminal
FIX lua.trm compatibility with lua version 5.3
FIX error line reporting inside an if/else bracketed clause
FIX error in date conversion for times within a nanosecond of a year boundary
CHANGES IN 5.2.5
NEW "set pm3d depthorder base" sorts pm3d quadrangles by projecting to z=0
NEW "set jitter vertical" displaces y coordinate rather than x coordinate
NEW array size can be determined automatically from the initializer
CHANGE place titles along x axis in plots with columnstacked histograms
CHANGE equivalent slope constraint for mcs splines at both ends of the range
CHANGE treat imaginary values plotted from a using spec as UNDEFINED (NaN)
CHANGE allow "reset" between plots in a multiplot layout
CHANGE Deprecate linux and vgagl terminals (to be removed in 5.3)
CHANGE placement of axis and tic labels in 3D projections on to xz or yz plane
CHANGE default to ./configure --without-wx-multithreading
FIX parametric function plots did not work with logscale x (regression in 5.2.0-4)
FIX polar mode "set trange" was assumed to use radians, now it tracks "set angle"
FIX clip polar grid lines and ticks to x/y range limits
FIX clipping of plot "with lines" when axes are nonlinear (regression from 5.0)
FIX clipping of all elements in finanacebars/candlesticks/boxplots
FIX clipping of 3D splot "with labels"
FIX strange interaction of "noautoscale" with blank data lines
FIX alignment of boxed text to center for eps/cairolatex
FIX incompatibility of "pm3d depthorder" and rgb color taken from data column
FIX aqua terminal font changes in enhanced text mode
Changes in 5.2.4
* NEW "call" parameters ARG1, ARG2, ... are also present as ARGV[1]...ARGV[ARGC]
* CHANGE generalize the test for missing data flag in input data
* CHANGE "set []range writeback" is now essentially always in effect
* CHANGE consistent placement of timestamp at true bottom of page
* FIX spurious evaluation of logscale coordinates as UNDEFINED
* FIX column header title assignments for histogram with errorbars
* FIX re-implement "refresh" command to use autoscale writeback/restore
* FIX font-handling bug; line-spacing of previous font still in effect
* FIX post, svg, dumb terminals: early fontsize initialization
Changes in 5.2.3
* NEW "set grid {no}vertical" adds grid lines in the xz and xz planes
* NEW "set cntrparam {firstlinetype N} {{un}sorted}"
* CHANGE drop non-working support for YIQ color space
* CHANGE expand \n characters when printing into a datablock
* CHANGE allow contour plots to opt out of hidden3d processing
* CHANGE special-case code to speed up handling of logscale axes
* CHANGE do not write GPFUN_* variables to "save" output file
* CHANGE default to density 100 for "set fs solid", 50 for "set fs transparent"
* FIX potential buffer overflow in gprintf formats containing %%
* FIX immediate response to ctrl-Z when libreadline is used for input
* FIX warning messages inside a bracketed clause could trigger early exit
* FIX tweak logscale tic range limits and minor tic generation intervals
* FIX stats FOO using 'namedcolumn' name columnhead
* FIX clipping of INRANGE->UNDEFINED line segments
* FIX use of logscale y axis in "set view map" or "set pm3d map" modes
* FIX placement of colorbox in "set view map" mode
* FIX autoscaled axis range of logscale axes in "set view map" mode
* FIX polar mode "with yerrorbars" error bars are radial, not vertical
* FIX clipping of circles whose center is offscreen to the left or bottom
* FIX snap to x=zero for function plot sampling does not apply to logscale x
* FIX canvas terminal: apply both color and alpha channel to points and lines
* FIX svg terminal: apply current color to dots
* FIX qt terminal: include "notitle" plots in accounting for toggle operations
* FIX svg terminal: point plot empty title produced spurious mousing directive
* FIX tikz terminal: failed to recognize dashtype 1
Changes in 5.2.2
* NEW set table separator {tab|comma|"char"} allows creation of csv files
* NEW hotkey for changing azimuth in 3D plots with mousing
* NEW splot ... with lines title at {beg|end}
* NEW Rework gstrptime() to handle relative time formats tH tM tS
* NEW command "set rgbmax <value>" controls interpretation of input RGB values
* FIX allow mixed use of in-key plot titles and manually placed titles
* FIX prevent runaway iterations of the form plot for [i=start:*] ...
* FIX handle in-line range limits for linked or nonlinear axes
* FIX restore pre-5.2 interpretation of logscaled tic increment as a multiplier
* FIX logscale tic placement is closer to that of versions before 5.2.0
* FIX recheck inrange/outrange points after spline or bezier smoothing
* FIX autoscaling of plots with linked axes where data is plotted on x2 or y2
* FIX sampling on x2 if linked to x1; e.g. plot sample [t=1:5:1] '+' axes x2y1
* FIX empty range on logscale y axis is handled by auto-extending the range
* FIX autoscaling xrange of stacked histograms
Release 5.2.1
A few bug-fixes present in the distributed package for 5.2.1 are not yet
commited upstream because the repository is in the process of migration
from cvs to git.
* src/graphics.c (plot_betweencurves):
plot 'foo' with filledcurves below y=bar
would fail to identify "below" regions where the y value foo[x] at the
start or end of the region was exactly equal to bar.
* src/axis.c (gen_tics): `set log x; set xtics foo` would always place
the first axis tic at foo rather than at (foo / base^N) for suitable N.
* src/win/winmain.c (ConsolePutS, ConsolePutCh): Use standard file IO
instead of Console API to enable word-wrapping on Windows 10 and to
allow for redirection of stdout/stderr.
* term/post.trm: Raise the limit on number of relative moves before
a "stroke" so that a full circle as drawn by do_arc() does not glitch
due to insertion of a "stroke xx yy M" sequence that resets the
dot/dash pattern.
* src/plot2d.c (eval_plots): If the range for logscaled y axis is empty,
e.g. the plot holds a single point, auto-extend the range rather than
giving up with an error.
NEW set term {pngcairo|pdfcairo} pointscale <factor>
NEW "save fit" back-ported from version 5.2 as a replacement for "update"
CHANGE deprecate "update" command (but do not remove it)
CHANGE allow placement of circles in 3D plots using axis coordinates
CHANGE ignore invalid z coordinate for 3D objects placed in "set view map"
CHANGE distinguish 'bind "shift-Button1"' from 'bind "Button1"'
CHANGE use Mingw-w64 and MSVC popen rather than built-in "fake" popen
FIX rangelimited y2 axis could produce spurious diagonal line across plot
FIX assignment of x/y dimensions in "binary record=(a,b) ... with image"
FIX negative array index caused by hidden3d degenerate polygon
FIX object clipping in "set view map"
FIX cairo terminals: scale textbox border linewidth by terminal linewidth
FIX canvas terminal: initialization of plot dimensions (affects first zoom)
FIX crash in stats if no usable data is found
FIX do not use LaTeX formatting in tabular output
FIX additional sanity checks for input data format
FIX more consistent handling of plot 'with table'
FIX incorrect, possibly empty, command string was saved for previous fit
FIX 2D images with logscale axes could fail (segfault)
FIX nested iteration containing an empty range
Changes in 5.0.6
================
* NEW command 'set micro' enables encoding-specific char for gprintf %c format
* NEW command 'set datafile missing NaN' treats invalid data as if it were missing
* NEW backport updated svg/domterm terminal from development version
* CHANGE - start/end limits in nested iterations are reevaluated dynamically
* CHANGE - revised adjustment of x2label and plot title when x2tics are present
* CHANGE - mark non-free pdf terminal DEPRECATED (to be removed in release 5.2)
* CHANGE - allow fractional font sizes for gdlib terminals
* CHANGE - do not allow inverted R axis (requires support not backported from 5.1)
* CHANGE - allow pointinterval property in 'with lp' for splot as well as for plot
* CHANGE - "linewidth <lw>" is accepted as a terminal option for aquaterm, qt, wxt
* CHANGE - spline segments outside xrange are ignored rather than treated as errors
* FIX assignment of x/y dimensions in "binary record=(a,b) ... with image"
* FIX wxt - multithreaded wxt was faulting during resize (mutex lock failure)
* FIX windows - timed pause only worked for intervals < 1 second
* FIX Front/back layering of border+grid lines was not always correct in hidden3d
* FIX "set pm3d depthorder interpolate N,M" memory allocation failure
* FIX aquaterm failed to honor request to disable enhanced text markup
* FIX save and show commands failed to list linecolor for lines with "lt -1"
* FIX the "missing" data flag is honored by "using ($n)" as it is for "using n"
* FIX error reporting of line number inside a bracketed clause
* FIX gnuplot_x11: possible fix for sporadic use-after-free error
* FIX initialization of hidden3d structures for splot with dots
* FIX track arrowhead properties in hidden3d mode
* FIX tracking of NaN values from function evaluated during binary data input
* FIX 3D rotation does not clobber hidden/visible status of plots
---------------------------------
Changes in 5.0.5
================
* NEW allow filename completion for system commands and pipes (backport from 5.1)
* NEW option to plot "with labels ... {rotate variable}"
* NEW command "set minussign"
* NEW stats command "name" option now accepts "columnheader" or "columnheader(N)"
* NEW command option "set colorbox invert"
* CHANGE qt terminal force selection of outline font rather than bitmap font
* CHANGE post terminal simplex/duplex output depends on PostScript level setting
* CHANGE improved autoscaling of plot "with boxes"
* CHANGE qt terminal sets TERM_POLYGON_PIXELS to avoid aliasing artifacts
* CHANGE all stats and fit commands skip header records if "autotitle columnhead"
* FIX Do not confuse EOF with 8-bit character 0x177 (E.g. in Cyrillic encodings).
* FIX use blank line rather than 'u' flag in "set table" output of smoothed data
* FIX order dependence of "fillcolor" keyword in plot commands
* FIX svg - better vertical justification of rotated text
* FIX wxt - file export widget correctly handles inactive plots
* FIX epslatex - reset linetype between plots (needed if plotted "notitle")
* FIX qt - leading or trailing whitespace in enhanced text was being ignored
* FIX regression in rendering 'plot ... matrix every ... with image'
---------------------------------
Changes in 5.0.4
================
* CHANGE minimum linewidth of all cairo terminals is now 0.2 pt
* CHANGE in-line datablock lines are not limited to 1024 characters
* CHANGE do not truncate or renumber history items in the active session
* CHANGE (Windows only) open piped output using mode "wb" rather than "w"
* CHANGE backport 5.1 use of "lc variable" to color boxplot factors
* CHANGE gnuplot_svg.js now remaps coords for svg image embedded in larger object
* CHANGE disallow "set palette maxcolors 1" (which has never worked)
* CHANGE data-input errors in "stats" now generate a warning rather than an error
* FIX placement of objects and labels using linked secondary axis coordinates
* FIX 'set term qt <N> close' acts immediately rather than after next mouse event
* FIX emf terminal could lose track of bold/italic/etc font properties
* FIX emf terminal text placement of UTF-8 strings
* FIX regression that caused "set log x; plot '-'; replot" to mess up autoscaling
* FIX regression in v5 that mangled 3D arrows defined by "from ... rto ..."
* FIX transposition of row/column count in plotting ascii x/y/z data "with image"
* FIX 7-column input to "splot ... with vectors"
* FIX ignore incomplete "every" spec for image plots
* FIX placement of xyplane does not depend on having tics or grid lines enabled
* FIX early program exit on replot+resize with inline data
* FIX bad plot iteration with negative increment, e.g. plot for [i=9:1:-1] foo(i)
* FIX smoothed curves could not be plotted as filledcurves; now they can be
* FIX win terminal apply color to enhanced text
Changes in 5.0.3
================
* NEW open-ended iteration over data: plot for [i=1:*] datafile index i
* CHANGE aquaterm support for version 5 custom dashtypes
* CHANGE backport new image bookkeeping from 5.1 to fix bugs #1607#1703#1709
* CHANGE qt terminal: toggle plots on/off only on left-click
* CHANGE wholesale upgrade of old tkcanvas terminal (version 3.7 -> version 5.0)
* FIX reevaluate fill color for each polygon in data for "with filledcurves"
* FIX multiple wxt terminal font problems
NEW support "set clip {one|two}" in 3D vector plots (splot ... with vectors)
CHANGE post.trm treats lt -1 as double width only when drawing the plot border
CHANGE distinguish between empty string variable and string constant ""
CHANGE preserve full precision of samples generated by '+' or '++'
CHANGE dumb terminal now handles UTF-8 characters
CHANGE "plot for [i=1:n] foo=i, x*foo" generates n plots (comma is ignored)
CHANGE accept '\r' as a terminator after console prompt (Windows only)
CHANGE use the same arrowhead style in the key sample as in the plot itself
CHANGE the command "set tics {front|back}" no longer affects grid lines also
CHANGE allow "noautoscale" keyword for 2D function plots
FIX dashtype labels in 'test' command were off by one
FIX autocalculation of box widths in the presence of NaN data values
FIX qt terminals dots were invisible
FIX point and impulse colors in 3D binary plots
FIX enable dashtype processing for epslatex terminal
FIX clean handling of unexpected input commands or data found by fuzz-testing
FIX many places where corrupt input commands or data could trigger a crash
FIX aquaterm fill area with transparency
FIX "offset 0" means "no offset" even in the case of log-scaled axes
FIX handle formatted read from a datablock
FIX "pause mouse" for wxt terminal (OSX, other single-threaded platforms)
FIX 2-column data plots "with filledcurve y=<value>"
FIX handling outliers in boxplot with categories (i.e. level in column 4)
FIX inline input format in `splot` command
FIX order-dependence of optional keywords for "set key" and "set obj polygon"
FIX lua/tikz text placement errors on OSX 10.10.2 with lua5.3
FIX B and L formats in gprintf()
FIX bug parsing time input with format "%s" (extra fractional second)
FIX incorrect average value in final bin of "smooth cnorm" calculation
FIX handle log-scale y values when calculating monotonic cubic spline fit
FIX "set clip points" was non-functional in version 5.0
FIX regression in 5.0.1 that left extraneous '@' in title columnhead(N)
FIX vertical placement of text fragments by cairo terminals
FIX "set [*]axis rangelimited" applies to minor as well as major tics
FIX qt terminal could drop chars from stdin depending on external event timing
