相关矩阵MATLAB

Question

你知道一个matlab脚本获取一组数据的相关矩阵,比如numbe of columns = 7和rows = n >> 7

 x1      x2      x3      x4     x5     x6      x7 

0.780   2.042   2.754   2.894  5.000  5.000  5.000
0.767   0.816   2.758   2.898  5.000  1.644  1.626
0.816   0.836   1.558   2.124  2.952  5.000  5.000
0.848   0.871   1.588   2.147  2.966  5.000  5.000
1.378   1.620   1.433   2.567  3.268  3.203  5.000
....

Answer 1

试试corrcoef.

通常,您可以通过搜索联机帮助立即找到这些类型的东西,例如通过方便的lookfor命令:

>> lookfor correlation
corrcoef                       - Correlation coefficients.
msfuncorr                      - an M-S-function which performs auto- and cross-
...

>> help corrcoef
CORRCOEF Correlation coefficients.
   R=CORRCOEF(X) calculates a matrix R of correlation coefficients for
   an array X, in which each row is an observation and each column is a
   variable.

例如

load file.txt
result= CORRCOEF(file);