示例:
using PyPlot
fig = gcf(); ax0=subplot(2,2,2)
ax1 = subplot(2,2,4)
ax0tr = ax0[:transAxes]; ax1tr = ax1[:transAxes]
figtr = fig[:transFigure]
# 2. Transform arroww start point from axis 0 to figure coordinates
ptB = figtr[:transform](ax0tr[:transform]((20., -0.5)))
# 3. Transform arroww end point from axis 1 to figure coordinates
ptE = figtr[:transform](ax1tr[:transform]((20., 1.)))
# 4. Create the patch
arroww = matplotlib[:patches][:FancyArrowPatch](
ptB, ptE, transform=figtr, # Place arroww in figure coord system
fc = "C0", alpha = 0.25, connectionstyle="arc3,rad=0.2",
arrowstyle="simple",
mutation_scale = 40.0)
# 5. Add patch to list of objects to draw onto the figure
push!(fig[:patches], arroww)
fig[:show]()
如何将补丁对象添加到图形中并在图形上实际看到它?这是行不通的。它不会抛出任何错误,但我看不到任何箭头。
(我也无法使用函数 arrow
因为我想创建一个从子图到子图的箭头)。
最佳答案
因为这仍然是热门搜索结果,所以这里有一个解决方案(使用 Julia 1.5.3)
import PyPlot; const plt = PyPlot
fig = plt.figure(figsize=(6,8), dpi=150)
ax0 = fig.add_subplot(2,2,2)
ax1 = fig.add_subplot(2,2,4)
arrow = patches.ConnectionPatch(
[0.2,1],
[0.6,0.5],
coordsA=ax0.transData,
coordsB=ax1.transData,
color="black",
arrowstyle="-|>",
mutation_scale=30,
linewidth=3,
)
fig.patches = [arrow]
它产生以下图。
关于matplotlib - 如何使用 Julia 的 PyPlot.jl 向图形添加补丁,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45213290/