Formula: y_transform ~ x^transform_exp * length * predict1_0(k, d, kmercov, 
    bias, x)

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       1.079e-02  7.030e-02   0.154    0.878    
kmercov 2.532e+02  2.724e+00  92.967  < 2e-16 ***
bias    0.000e+00  3.366e-01   0.000    1.000    
length  1.398e+05  2.281e+04   6.130 1.06e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 563400 on 1996 degrees of freedom

Number of iterations to convergence: 24 
Achieved convergence tolerance: 1.49e-08