how to get a linearity of a 3D field? - 未名空间MITBBS历史存档

国际科技财经博客移民网络热点娱乐民生时事公众号

Redian新闻

>未名空间

>Computation - 科学计算

how to get a linearity of a 3D field?

how to get a linearity of a 3D field?# Computation - 科学计算

s*i2004-12-01 08:12

1 楼

Hi there,
I have a question.
Say I have computed a scalar field in a 3D space. I want to know how linear
this field is,i.e, how close it is too
f=a*x+b*y+c*z+d
I basically have a list of points with
x y z f
Is there any way statistics to show this?
Thanks a lot.

h*o2004-12-01 08:12

2 楼

最小二乘法，线性拟合出a, b, c, d
然后求真实f和拟合f的方差不就可以吗？
方差越大，linearity is poorer

【在 s**i 的大作中提到】

: Hi there,
: I have a question.
: Say I have computed a scalar field in a 3D space. I want to know how linear
: this field is,i.e, how close it is too
: f=a*x+b*y+c*z+d
: I basically have a list of points with
: x y z f
: Is there any way statistics to show this?
: Thanks a lot.