我有一个包含x,y,vx,vy的数据帧2,我想计算二维框中vx和vy的平均值,比如:
for x in range (0,330,16):
for y in range (0,600,100):
mean=vx.mean()
mean2=vy.mean()
mean3=sqrt(mean**2+mean2**2)
MeanVx.append(mean)
MeanVy.append(mean2)
MeanVm.append(mean3)
我能够使用以下代码在1D over x中完成此操作:
i=0.0
height=np.ceil(max(vels["x"]))
height1=np.ceil(max(vels["y"]))
print(height)
MeanVx=[]
MeanVy=[]
MeanVm=[]
steps=18.18 #The width of the area
steps1=36.36
while (np.round(i)<= height):
filter_vels = vels[(i <= vels.x) & (vels.x<= i+steps)] #calculating the x intervals in px
mean=filter_vels["vx"].mean()*2.75 #in µm/s avraging all values of vx present on a given x
mean3=filter_vels["vy"].mean()*2.75
mean4=sqrt(mean**2+mean3**2)
MeanVx.append(mean)
MeanVy.append(mean3)
MeanVm.append(mean4)
i=i+steps
rangeX= np.linspace(0,np.ceil(height),len(MeanVx)) #in px
我找不到将其应用于2D的方法。谢谢
图像中每个框中的平均速度
目前没有回答
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