What should I do if I am unable to plot the learning rate after lr_find
I think you’re skipping the first 100 iterations. Did you try plotting without passing in 100 into the plot function?
You might also have a lot of variance in the loss. There is code that stops training if the loss increases by more than 4x. See LR_Finder https://github.com/fastai/fastai/blob/5d68e7d5f2dcf20b393999ca87b2e4bfce31937d/fastai/sgdr.py