In the python matplotlib drawing function, the function of the pie chart is a pie
Interpretation pie function parameters
plt.pie(x, explode=None, labels=None, colors=None, autopct=None, pctdistance=0.6, shadow=False, labeldistance=1.1, startangle=None, radius=None, counterclock=True, wedgeprops=None, textprops=None, center=(0, 0), frame=False)
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x: specified drawing data;
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explode: to highlight certain parts of the designated pie, that is explosively;
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labels: add tags is illustrated as a pie chart, similar to the legend;
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colors: specified color pie filling;
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autopct: automatically added percentage display, a method may be employed formatted display;
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pctdistance: set the percentage tag and the center distance;
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shadow: whether to add the shadow effect of the pie;
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labeldistance: Set each sector tab (legend) and the center of the distance;
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startangle: Set initial placement angle of the pie;
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radius: Set the radius of the pie;
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counterclock: whether to make a pie chart showing counterclockwise order;
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wedgeprops: pie set properties inside and outside the boundary, such boundary line thickness, color and the like;
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textprops: Set pie Chinese text attributes such as font size, color and the like;
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center: the center point of the pie specified, the default is the origin
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frame: whether to display the frame behind the pie, if set to True, then you need to control frame x-axis, the center position of the range of the y-axis and pie;
Examples
1. The basic drawing functions
Import matplotlib.pyplot AS PLT # solve the Chinese garbled # normal display Chinese label plt.rcParams [ ' font.sans serif- ' ] = [ ' SimHei ' ] # for normal display negative plt.rcParams [ ' axes.unicode_minus ' ] = False # scale size plt.rcParams [ ' axes.labelsize ' ] = 16 # line thickness plt.rcParams [ ' lines.linewidth ' ] = 2 # X-axis size plt.rcParams [ ' xtick.labelsize ' ] = 14 # y-axis size plt.rcParams [ ' ytick.labelsize ' ] = 14 # Legend size plt.rcParams [ ' legend.fontsize ' ] = 14 # FIG size plt.rcParams [ ' figure.figsize ' ] = [12,8 ] # ======================================= # basic example # define cake label, labels = [ ' a ' , ' B ' , ' C ' , ' E ' ] # proportion occupied by each label X = [15,30,45,10 ] #
Drawing pie plt.pie (X, = Labels Labels) plt.show ()
Note: other parameters without using the function, not necessarily circular; and a great operating results obtained according to the parameter settings, doing so is not recommended.
2. Draw circular pie chart
Import matplotlib.pyplot AS PLT Labels = [ ' A ' , ' B ' , ' C ' , ' D ' ] X = [15,30,45,10 ] # shows the percentage plt.pie (x, labels = labels, autopct = ' % 3.2F %% ' ) # set x, y of the same scale, it is a perfect circle pie plt.axis ( ' equal ' ) plt.show ()
3. Draw pie - tag text attribute value
Import matplotlib.pyplot AS PLT Labels = [ ' A ' , ' B ' , ' C ' , ' D ' ] X = [15,30,45,10 ] # shows the percentage # textprops = { 'fontSize': 18 is, ' color ':' k '} is set to a font size of 18, color black plt.pie (X, = Labels Labels, autopct = ' % 3.2F %% ' , textprops = { ' fontSize ' : 18, ' color ' : ' K ' }) # set x,y the same scale, so the pie is a perfect circle plt.axis ('equal') plt.show()
4. Isolation and shaded pie chart provided
Import matplotlib.pyplot AS PLT Labels = [ ' A ' , ' B ' , ' C ' , ' D ' ] X = [15,30,45,10 ] # shows the percentage # pie isolated the explode = (0,0.1 , 0,0) # set shadows plt.pie (x, = Labels Labels, autopct = ' % 3.2F %% ' , the explode = the explode, shadow = True) # set x, y of the same scale, to make pie perfect circular plt.axis ( ' equal ' ) plt.show ()
The starting angle
Import matplotlib.pyplot AS PLT Labels = [ ' A ' , ' B ' , ' C ' , ' D ' ] X = [15,30,45,10 ] # shows the percentage # pie isolated the explode = (0,0.1 , 0,0) # set shadow effect # startAngle, as a starting angle, 0 represents from 0 counterclockwise rotation, as the first one. plt.pie (x, = Labels Labels, autopct = ' % 3.2F %% ' , the explode = the explode, Shadow = True, startAngle = 60 ) # Set x, y of the same scale, making it a perfect circle pie plt. Axis ( ' equal ') plt.show()
6 center distance and tips tag and saves it to
Import matplotlib.pyplot AS PLT Labels = [ ' A ' , ' B ' , ' C ' , ' D ' ] X = [15,30,45,10 ] # shows the percentage # pie isolated the explode = (0,0.1 , 0,0) # set shadow effect # startAngle, as a starting angle, 0 represents from 0 counterclockwise rotation, as the first one. # Pctdistance, the percentage of text from the center distance of 0.5 plt.pie (X, = Labels Labels, autopct = ' % 3.2F %% ' , the explode = the explode, Shadow = True, startAngle = 60, pctdistance = 0.8 ) #Setting x, y of the same scale, it is a perfect circle pie plt.axis ( ' equal ' ) plt.legend () # saved to a local folder plt.savefig ( ' ./ pie .png ' ) plt.show ()
