Question

我想要检测斑点的平均速度，一旦它被检测到它离开屏幕，我就无法设置如何设置要使用的值的边界。

以下是一些示例数据：

#35 x_cen=NaN  y_cen=NaN  curSpeed=0
Elapsed time is 0.263965 seconds.
#36 x_cen=NaN  y_cen=NaN  curSpeed=0
Elapsed time is 0.263827 seconds.
#37 x_cen=NaN  y_cen=NaN  curSpeed=0
Elapsed time is 0.420120 seconds.
#38 x_cen=3.052941e+01  y_cen=1.147059e+01  curSpeed=0
Elapsed time is 0.302205 seconds.
#39 x_cen=30  y_cen=1.104167e+01  curSpeed=6.813593e-01
Elapsed time is 0.294330 seconds.
#40 x_cen=30  y_cen=1.104167e+01  curSpeed=6.813593e-01
Elapsed time is 0.281333 seconds.
#41 x_cen=30  y_cen=1.104167e+01  curSpeed=6.813593e-01
Elapsed time is 0.293527 seconds.
#42 x_cen=NaN  y_cen=NaN  curSpeed=0
Elapsed time is 0.272795 seconds.
#43 x_cen=NaN  y_cen=NaN  curSpeed=0
Elapsed time is 0.271102 seconds.
#44 x_cen=NaN  y_cen=NaN  curSpeed=0

在此示例数据中，我希望对象的平均速度从第39帧开始到第41帧。

目前，我可以使用以下代码计算指定帧数的平均速度：

   avgSpeed = (curSpeed + sum(speedData(end-2:end))) / 4;

我打算在if语句中包含上述行，如果我能找到使用可变行号的方法。

Answer 1

我使用以下代码来确定帧数和平均速度：

moving = false;
startFrame = 0;
endFrame = 0;
counter = 0;
        speedTotal = 0;
        if curSpeed > 0 && moving == false
            counter = counter + 1;
            speedTotal = speedTotal + curSpeed;
        elseif curSpeed == 0
            moving = false;
            avgSpeed = speedTotal / counter
            counter = 0;
            avgSpeed = 0;
            speedTotal = 0;
        end

Matlab - 计算非NaN帧的平均值

1 个答案: