Matplotlib 0.98.4 的新功能#
自上次 matplotlib 發佈以來已四個月，並且有很多新功能和錯誤修復。
感謝 Charlie Moad 測試和準備原始碼發佈，包括適用於 Python 2.4 和 2.5 的 OS X 和 Windows 的二進制檔案 (在這些發佈版本上可以使用 numpy 之前，將不會有 2.6 和 3.0 版本)。感謝許多為此發佈做出貢獻的開發人員，其中有 Jae-Joon Lee、Michael Droettboom、Ryan May、Eric Firing、Manuel Metz、Jouni K. Seppänen、Jeff Whitaker、Darren Dale、David Kaplan、Michiel de Hoon 以及許多其他提交補丁的人
圖例增強功能#
Jae-Joon 重新編寫了圖例類別，並增加了對多列和多行的支援，以及精美的框線繪製。請參閱legend() 和 matplotlib.legend.Legend。
精美的註釋和箭頭#
Jae-Joon 為註釋增加了許多支援，可以在註釋中繪製精美的框線和連接線。請參閱 annotate() 和 BoxStyle、ArrowStyle 和 ConnectionStyle。
原生 OS X 後端#
Michiel de Hoon 提供了一個原生 Mac OSX 後端，幾乎完全用 C 語言實現。因此，該後端可以直接使用 Quartz，並且根據應用程式的不同，可以比現有的後端快幾個數量級。此外，除了 Python 和 NumPy 之外，不需要任何第三方程式庫。該後端可以使用常規 Python 從 Mac 上的常用終端應用程式進行互動。它尚未通過 ipython 進行測試，但原則上它應該也可以在那裡工作。在您的 matplotlibrc 檔案中設定 'backend : macosx'，或使用以下命令執行您的腳本
> python myfile.py -dmacosx
psd 振幅縮放#
Ryan May 做了很多工作來合理化 psd() 和相關功能的振幅縮放。請參閱功率譜密度 (PSD)。這些變更應提高 MATLAB 相容性並增加縮放選項。
填滿之間#
新增了 fill_between() 函數，以便在存在遮罩數據時更容易繪製陰影區域圖。您可以傳遞一個 x 陣列以及 ylower 和 yupper 陣列來填充其間的區域，並可選擇性地使用 where 參數，該參數是一個邏輯遮罩，用於指定您想要填充的區域。
更多內容#
以下是來自 CHANGELOG 的 0.98.4 版本說明
Added mdehoon's native macosx backend from sf patch 2179017 - JDH
Removed the prints in the set_*style commands. Return the list of
pretty-printed strings instead - JDH
Some of the changes Michael made to improve the output of the
property tables in the rest docs broke of made difficult to use
some of the interactive doc helpers, e.g., setp and getp. Having all
the rest markup in the ipython shell also confused the docstrings.
I added a new rc param docstring.harcopy, to format the docstrings
differently for hardcopy and other use. The ArtistInspector
could use a little refactoring now since there is duplication of
effort between the rest out put and the non-rest output - JDH
Updated spectral methods (psd, csd, etc.) to scale one-sided
densities by a factor of 2 and, optionally, scale all densities by
the sampling frequency. This gives better MATLAB
compatibility. -RM
Fixed alignment of ticks in colorbars. -MGD
drop the deprecated "new" keyword of np.histogram() for numpy 1.2
or later. -JJL
Fixed a bug in svg backend that new_figure_manager() ignores
keywords arguments such as figsize, etc. -JJL
Fixed a bug that the handlelength of the new legend class set too
short when numpoints=1 -JJL
Added support for data with units (e.g., dates) to
Axes.fill_between. -RM
Added fancybox keyword to legend. Also applied some changes for
better look, including baseline adjustment of the multiline texts
so that it is center aligned. -JJL
The transmuter classes in the patches.py are reorganized as
subclasses of the Style classes. A few more box and arrow styles
are added. -JJL
Fixed a bug in the new legend class that didn't allowed a tuple of
coordinate values as loc. -JJL
Improve checks for external dependencies, using subprocess
(instead of deprecated popen*) and distutils (for version
checking) - DSD
Reimplementation of the legend which supports baseline alignment,
multi-column, and expand mode. - JJL
Fixed histogram autoscaling bug when bins or range are given
explicitly (fixes Debian bug 503148) - MM
Added rcParam axes.unicode_minus which allows plain hyphen for
minus when False - JDH
Added scatterpoints support in Legend. patch by Erik Tollerud -
JJL
Fix crash in log ticking. - MGD
Added static helper method BrokenHBarCollection.span_where and
Axes/pyplot method fill_between. See
examples/pylab/fill_between.py - JDH
Add x_isdata and y_isdata attributes to Artist instances, and use
them to determine whether either or both coordinates are used when
updating dataLim. This is used to fix autoscaling problems that
had been triggered by axhline, axhspan, axvline, axvspan. - EF
Update the psd(), csd(), cohere(), and specgram() methods of Axes
and the csd() cohere(), and specgram() functions in mlab to be in
sync with the changes to psd(). In fact, under the hood, these
all call the same core to do computations. - RM
Add 'pad_to' and 'sides' parameters to mlab.psd() to allow
controlling of zero padding and returning of negative frequency
components, respectively. These are added in a way that does not
change the API. - RM
Fix handling of c kwarg by scatter; generalize is_string_like to
accept numpy and numpy.ma string array scalars. - RM and EF
Fix a possible EINTR problem in dviread, which might help when
saving pdf files from the qt backend. - JKS
Fix bug with zoom to rectangle and twin axes - MGD
Added Jae Joon's fancy arrow, box and annotation enhancements --
see examples/pylab_examples/annotation_demo2.py
Autoscaling is now supported with shared axes - EF
Fixed exception in dviread that happened with Minion - JKS
set_xlim, ylim now return a copy of the viewlim array to avoid
modify inplace surprises
Added image thumbnail generating function
matplotlib.image.thumbnail. See examples/misc/image_thumbnail.py
- JDH
Applied scatleg patch based on ideas and work by Erik Tollerud and
Jae-Joon Lee. - MM
Fixed bug in pdf backend: if you pass a file object for output
instead of a filename, e.g., in a wep app, we now flush the object
at the end. - JKS
Add path simplification support to paths with gaps. - EF
Fix problem with AFM files that don't specify the font's full name
or family name. - JKS
Added 'scilimits' kwarg to Axes.ticklabel_format() method, for
easy access to the set_powerlimits method of the major
ScalarFormatter. - EF
Experimental new kwarg borderpad to replace pad in legend, based
on suggestion by Jae-Joon Lee. - EF
Allow spy to ignore zero values in sparse arrays, based on patch
by Tony Yu. Also fixed plot to handle empty data arrays, and
fixed handling of markers in figlegend. - EF
Introduce drawstyles for lines. Transparently split linestyles
like 'steps--' into drawstyle 'steps' and linestyle '--'. Legends
always use drawstyle 'default'. - MM
Fixed quiver and quiverkey bugs (failure to scale properly when
resizing) and added additional methods for determining the arrow
angles - EF
Fix polar interpolation to handle negative values of theta - MGD
Reorganized cbook and mlab methods related to numerical
calculations that have little to do with the goals of those two
modules into a separate module numerical_methods.py Also, added
ability to select points and stop point selection with keyboard in
ginput and manual contour labeling code. Finally, fixed contour
labeling bug. - DMK
Fix backtick in Postscript output. - MGD
[ 2089958 ] Path simplification for vector output backends
Leverage the simplification code exposed through path_to_polygons
to simplify certain well-behaved paths in the vector backends
(PDF, PS and SVG). "path.simplify" must be set to True in
matplotlibrc for this to work. - MGD
Add "filled" kwarg to Path.intersects_path and
Path.intersects_bbox. - MGD
Changed full arrows slightly to avoid an xpdf rendering problem
reported by Friedrich Hagedorn. - JKS
Fix conversion of quadratic to cubic Bezier curves in PDF and PS
backends. Patch by Jae-Joon Lee. - JKS
Added 5-point star marker to plot command q- EF
Fix hatching in PS backend - MGD
Fix log with base 2 - MGD
Added support for bilinear interpolation in
NonUniformImage; patch by Gregory Lielens. - EF
Added support for multiple histograms with data of
different length - MM
Fix step plots with log scale - MGD
Fix masked arrays with markers in non-Agg backends - MGD
Fix clip_on kwarg so it actually works correctly - MGD
Fix locale problems in SVG backend - MGD
fix quiver so masked values are not plotted - JSW
improve interactive pan/zoom in qt4 backend on windows - DSD
Fix more bugs in NaN/inf handling. In particular, path
simplification (which does not handle NaNs or infs) will be turned
off automatically when infs or NaNs are present. Also masked
arrays are now converted to arrays with NaNs for consistent
handling of masks and NaNs - MGD and EF
Added support for arbitrary rasterization resolutions to the SVG
backend. - MW