python matplotlib use in (ii)

1, set the scale, legend and coordinate label font size

1), provided the size scale

plt.xticks(fontsize=20)
plt.yticks(fontsize=20)

2), the size of the set coordinates

plt.xlabel(..., fontsize=20)
plt.ylabel(..., fontsize=20)

3), set the font size of the legend

plt.legend(..., fontsize=20)

2, add notes (annotate)

plt.annotate('注释', xy=(2, 1), xytext=(3, 4),color='r',size=15,arrowprops=dict(facecolor='g', shrink=0.05))

PS:

• Parameters xyis necessary to add comment location.
• Parameter xytextis the location of the comment content.
• Parameters xycoordsare as follows:

parameter	Introduction
figure points	points from the lower left of the figure in the lower left point
figure pixels	pixel pixels from the lower left of the figure in the lower left corner of FIG.
figure fraction	fraction of figure from lower left portion of the lower left corner of the digital
axes points	points from lower left corner of axes from the bottom left coordinate point
axes pixels	pixels from lower left corner of axes from the bottom left corner pixel coordinates
axes fraction	fraction of axes from lower left portion of the lower left corner
data	use the coordinate system of the object being annotated coordinate system (default) using the annotated objects (default)
polar(theta,r)	if not native ‘data’ coordinates t

• Parameters colorset the font color.
• Parameter extcoordsSet Text Offset Note:

parameter	Coordinate System
‘figure points’	The number of points from the lower left corner of the graphic
‘figure pixels’	The number of pixels from the lower left corner of the graphic
‘figure fraction’	0,0 is a graphical lower left corner, upper right corner is 1,1
‘axes points’	From the lower left corner of the number of domains axis
‘axes pixels’	The number of pixels from the lower left corner of the domain axis
‘axes fraction’	0,0-axis field is the lower left corner, upper right corner 1,1
‘data’	Domain data using coordinate axis

• Parameter sizeSettings Comments font size.
• Parameters verticalalignment: vertical alignment parameters: [ 'center' | 'top ' | 'bottom' | 'baseline']
• Parameters horizontalalignment: horizontal alignment parameters: [ 'center' | 'right ' | 'left']
• Parameters arrowpropsrelated parameter information relevant arrow dict types:
  use:

 arrowprops=dict(facecolor='g', shrink=0.05)

parameter	Introduction
width	the width of the width of the arrow in points arrow points
headwidth	The width of the width of the base of the arrow head in points in the base point of the arrow
headlength	the length of the arrow head in points of the point of the arrow length
shrink	fraction of total length to 'shrink' from both ends of the total length score "shrink" from both ends
facecolor	Arrow Color

• Parameter bboxis related to comments about the borders of the dict class parameters:
  Use:

  bbox=dict(boxstyle='round,pad=0.5', fc='yellow', ec='k',lw=1 ,alpha=0.5) 

parameter	Introduction
boxstyle	Block shape
facecolor (abbreviated fc)	background color
edgecolor (abbreviated ec)	Border Line Color
edgewidth	Border Line size

** PS: ** common block shape are:

1. square
2. sawtooth
3. roundtooth
4. raarow
5. larrow
6. round
7. round4

3, text

plt.text(6, 5, "test", size=50, rotation=30.,ha="center", va="center",bbox=dict(boxstyle="round",ec=(1., 0.5, 0.5),fc=(1., 0.8, 0.8),))

• Parameters x,y: values represent coordinate values.
• Parameters colorset the font color.
• Parameters fontsizeset the font size.
• Parameters verticalalignment: vertical alignment parameters: [ 'center' | 'top ' | 'bottom' | 'baseline']
• Parameters horizontalalignment: horizontal alignment parameters: [ 'center' | 'right ' | 'left']
• Parameter xycoordsselecting specified coordinate axis system, the parameters related to the content above.
• Parameters bboxto increase the title frame, parameters related to the content above.

Reference Code:

https://github.com/ZhangJiangtao-0108/python in the matplotlib_example.pyfile