用对数模型做了一下回归
Coefficients:
            Estimate Std. Error t value Pr(>|t|)   
(Intercept)  0.07091    0.11687   0.607 0.559027   
log(a$RWC)   0.20231    0.03924   5.155 0.000599 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.1462 on 9 degrees of freedom
Multiple R-squared:  0.747,     Adjusted R-squared:  0.7189
F-statistic: 26.58 on 1 and 9 DF,  p-value: 0.0005988


然后添加回归曲线
lines(log(a$RWC),fitted(lm.log))
结果画出来的确是如下所示？？怎么回事？？