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

Parameters:
         Estimate Std. Error t value Pr(>|t|)    
d       0.000e+00  7.568e-02   0.000        1    
kmercov 2.531e+02  2.869e+00  88.221  < 2e-16 ***
bias    0.000e+00  3.542e-01   0.000        1    
length  8.119e+05  1.400e+05   5.798 7.76e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 3483000 on 1996 degrees of freedom

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