Formula: y_transform ~ x^transform_exp * length * predict2_0(r1, k, d, 
    kmercov, bias, x)

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       1.846e-02  7.627e-02   0.242   0.8088    
r1      7.013e-03  4.089e-03   1.715   0.0865 .  
kmercov 1.267e+02  1.327e+00  95.450  < 2e-16 ***
bias    0.000e+00  3.253e-01   0.000   1.0000    
length  8.279e+04  1.379e+04   6.002  2.3e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 280500 on 1995 degrees of freedom

Number of iterations to convergence: 23 
Achieved convergence tolerance: 1.49e-08