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

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       0.000e+00  5.382e-01   0.000   1.0000    
r1      1.042e-01  1.571e-01   0.663   0.5071    
kmercov 2.533e+02  2.727e+00  92.913   <2e-16 ***
bias    0.000e+00  3.345e-01   0.000   1.0000    
length  7.300e+04  3.126e+04   2.335   0.0196 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 540700 on 1995 degrees of freedom

Number of iterations to convergence: 26 
Achieved convergence tolerance: 1.49e-08