python 中的matplotlib.pylot 模块中的plot 用法

>>>import matplotlib

>>>from pylab import *

>>>help(plot)

运行后见下图所示

Help on function plot in module matplotlib.pyplot:


plot(*args, **kwargs)
    Plot lines and/or markers to the
    :class:`~matplotlib.axes.Axes`.  *args* is a variable length
    argument, allowing for multiple *x*, *y* pairs with an
    optional format string.  For example, each of the following is
    legal::
    
        plot(x, y)         # plot x and y using default line style and color
        plot(x, y, 'bo')   # plot x and y using blue circle markers
        plot(y)            # plot y using x as index array 0..N-1
        plot(y, 'r+')      # ditto, but with red plusses
    
    If *x* and/or *y* is 2-dimensional, then the corresponding columns
    will be plotted.
    
    An arbitrary number of *x*, *y*, *fmt* groups can be
    specified, as in::
    
        a.plot(x1, y1, 'g^', x2, y2, 'g-')
    
    Return value is a list of lines that were added.
    
    The following format string characters are accepted to control
    the line style or marker:
    
    ================    ===============================
    character           description
    ================    ===============================
    ``'-'``             solid line style
    ``'--'``            dashed line style
    ``'-.'``            dash-dot line style
    ``':'``             dotted line style
    ``'.'``             point marker
    ``','``             pixel marker
    ``'o'``             circle marker
    ``'v'``             triangle_down marker
    ``'^'``             triangle_up marker
    ``'<'``             triangle_left marker
    ``'>'``             triangle_right marker
    ``'1'``             tri_down marker
    ``'2'``             tri_up marker
    ``'3'``             tri_left marker
    ``'4'``             tri_right marker
    ``'s'``             square marker
    ``'p'``             pentagon marker
    ``'*'``             star marker
    ``'h'``             hexagon1 marker
    ``'H'``             hexagon2 marker
    ``'+'``             plus marker
    ``'x'``             x marker
    ``'D'``             diamond marker
    ``'d'``             thin_diamond marker
    ``'|'``             vline marker
    ``'_'``             hline marker
    ================    ===============================
    
    
    The following color abbreviations are supported:
    
    ==========  ========
    character   color
    ==========  ========
    'b'         blue
    'g'         green
    'r'         red
    'c'         cyan
    'm'         magenta
    'y'         yellow
    'k'         black
    'w'         white
    ==========  ========
    
    In addition, you can specify colors in many weird and
    wonderful ways, including full names (``'green'``), hex
    strings (``'#008000'``), RGB or RGBA tuples (``(0,1,0,1)``) or
    grayscale intensities as a string (``'0.8'``).  Of these, the
    string specifications can be used in place of a ``fmt`` group,
    but the tuple forms can be used only as ``kwargs``.
    
    Line styles and colors are combined in a single format string, as in
    ``'bo'`` for blue circles.
    
    The *kwargs* can be used to set line properties (any property that has
    a ``set_*`` method).  You can use this to set a line label (for auto
    legends), linewidth, anitialising, marker face color, etc.  Here is an
    example::
    
        plot([1,2,3], [1,2,3], 'go-', label='line 1', linewidth=2)
        plot([1,2,3], [1,4,9], 'rs',  label='line 2')
        axis([0, 4, 0, 10])
        legend()
    
    If you make multiple lines with one plot command, the kwargs
    apply to all those lines, e.g.::
    
        plot(x1, y1, x2, y2, antialised=False)
    
    Neither line will be antialiased.
    
    You do not need to use format strings, which are just
    abbreviations.  All of the line properties can be controlled
    by keyword arguments.  For example, you can set the color,
    marker, linestyle, and markercolor with::
    
        plot(x, y, color='green', linestyle='dashed', marker='o',
             markerfacecolor='blue', markersize=12).  See
             :class:`~matplotlib.lines.Line2D` for details.
    
    The kwargs are :class:`~matplotlib.lines.Line2D` properties:
    
      agg_filter: unknown
      alpha: float (0.0 transparent through 1.0 opaque)         
      animated: [True | False]         
      antialiased or aa: [True | False]         
      axes: an :class:`~matplotlib.axes.Axes` instance         
      clip_box: a :class:`matplotlib.transforms.Bbox` instance         
      clip_on: [True | False]         
      clip_path: [ (:class:`~matplotlib.path.Path`,         :class:`~matplotlib.transforms.Transform`) |         :class:`~matplotlib.patches.Patch` | None ]         
      color or c: any matplotlib color         
      contains: a callable function         
      dash_capstyle: ['butt' | 'round' | 'projecting']         
      dash_joinstyle: ['miter' | 'round' | 'bevel']         
      dashes: sequence of on/off ink in points         
      data: 2D array (rows are x, y) or two 1D arrays         
      drawstyle: [ 'default' | 'steps' | 'steps-pre' | 'steps-mid' | 'steps-post' ]         
      figure: a :class:`matplotlib.figure.Figure` instance         
      fillstyle: ['full' | 'left' | 'right' | 'bottom' | 'top']         
      gid: an id string         
      label: any string         
      linestyle or ls: [ ``'-'`` | ``'--'`` | ``'-.'`` | ``':'`` | ``'None'`` | ``' '`` | ``''`` ]         and any drawstyle in combination with a linestyle, e.g. ``'steps--'``.         
      linewidth or lw: float value in points         
      lod: [True | False]         
      marker: [ ``7`` | ``4`` | ``5`` | ``6`` | ``'o'`` | ``'D'`` | ``'h'`` | ``'H'`` | ``'_'`` | ``''`` | ``None`` | ``'None'`` | ``' '`` | ``'8'`` | ``'p'`` | ``','`` | ``'+'`` | ``'.'`` | ``'s'`` | ``'*'`` | ``'d'`` | ``3`` | ``0`` | ``1`` | ``2`` | ``'1'`` | ``'3'`` | ``'4'`` | ``'2'`` | ``'v'`` | ``'<'`` | ``'>'`` | ``'^'`` | ``'|'`` | ``'x'`` | ``'$...$'`` | *tuple* | *Nx2 array* ]
      markeredgecolor or mec: any matplotlib color         
      markeredgewidth or mew: float value in points         
      markerfacecolor or mfc: any matplotlib color         
      markerfacecoloralt or mfcalt: any matplotlib color         
      markersize or ms: float         
      markevery: None | integer | (startind, stride)
      picker: float distance in points or callable pick function         ``fn(artist, event)``         
      pickradius: float distance in points         
      rasterized: [True | False | None]         
      snap: unknown
      solid_capstyle: ['butt' | 'round' |  'projecting']         
      solid_joinstyle: ['miter' | 'round' | 'bevel']         
      transform: a :class:`matplotlib.transforms.Transform` instance         
      url: a url string         
      visible: [True | False]         
      xdata: 1D array         
      ydata: 1D array         
      zorder: any number         
    
    kwargs *scalex* and *scaley*, if defined, are passed on to
    :meth:`~matplotlib.axes.Axes.autoscale_view` to determine
    whether the *x* and *y* axes are autoscaled; the default is
    *True*.
    
    Additional kwargs: hold = [True|False] overrides default hold state


>>>