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  8.259e-02   0.000  1.00000    
r1      1.086e-02  4.010e-03   2.709  0.00681 ** 
kmercov 1.266e+02  1.317e+00  96.099  < 2e-16 ***
bias    0.000e+00  3.164e-01   0.000  1.00000    
length  1.717e+05  2.750e+04   6.243 5.23e-10 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 550300 on 1995 degrees of freedom

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