Creating Scatter Plot

[HalKosik]

I am attempting to run this program with an AWR1443. I found this code in a comment on the SDK V1 page you have.
The issue I am having is the code seems to run with no issues but there is no plot appearing. Is there a separate program/app that I need to download to be able to create the plot?
now I am also receiving the error "UnboundLocalError: cannot access local variable 'chirpEndIdx' where it is not associated with a value"
Thanks!

[fengdehuaiyuan]

            detObj = {"numObj": numDetectedObj, "x": x, "y": y, "z": z, "velocity":velocity}
            # 从detObj中提取数据
            x = detObj["x"]
            y = detObj["y"]
            z = detObj["z"]
            # 绘制数据点
            ax.scatter(x, y, z)