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  8.217e-02   0.000   1.0000    
r1      9.596e-03  4.080e-03   2.352   0.0188 *  
kmercov 1.267e+02  1.328e+00  95.396  < 2e-16 ***
bias    0.000e+00  2.977e-01   0.000   1.0000    
length  1.645e+05  2.691e+04   6.113 1.17e-09 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 543800 on 1995 degrees of freedom

Number of iterations to convergence: 22 
Achieved convergence tolerance: 1.49e-08