[R] Solving Function using Conjugate Gradient

[smart hendsome]

Hi R-user,
I have a problem regarding to estimate lambda[r] by minimizing the convex function using conjugate gradient in R-programming.  The function as below:


Hopefully, anybody in this forum can help me. Thanks so much.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: lag.png
Type: image/png
Size: 6204 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20190320/05b46132/attachment.png>