Question

matlab中regress怎么用不对？？？

>> x1=[66.290 40.964 72.996 45.010 57.204 26.852 38.122 35.840 75.796]

x1 =

66.2900 40.9640 72.9960 45.0100 57.2040 26.8520 38.1220 35.8400 75.7960

>> y=[196 63 252 84 126 14 49 49 266]

y =

196 63 252 84 126 14 49 49 266

>> [b,bint,r,rint,stats]=regress(y,x1)
??? Error using ==> regress
The number of rows in Y must equal the number of rows in X.
请问出现这个问题为什么？？？

Answer 1

看一下regress的帮助文件： B = REGRESS(Y,X) returns the vector B of regression coefficients in thelinear model Y = X*B.
X is an n-by-p design matrix, with rowscorresponding to observations and columns to predictor variables.
Y isan n-by-1 vector of response observations.

它要求X是n*p阶矩阵，而Y为n*1向量，你的应该改成regress(y',x1') 。

Answer 2

regress(y',x1')