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

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       7.322e-03  8.080e-02   0.091    0.928    
r1      8.499e-03  4.135e-03   2.055    0.040 *  
kmercov 1.267e+02  1.345e+00  94.202  < 2e-16 ***
bias    0.000e+00  3.245e-01   0.000    1.000    
length  8.509e+04  1.432e+04   5.942 3.31e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 288000 on 1995 degrees of freedom

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