The docs seem to indicate that add_custom_scalars_multilinechart does it but it is not working.
Have something like this:
from tensorboardX import SummaryWriter
writer = SummaryWriter(comment='test')
writer.add_custom_scalars_multilinechart(['loss/train', 'loss/test'], title='losses')
for blahblah:
...
writer.add_scalar('loss/train', loss.item(), epoch)
writer.add_scalar('loss/test', loss_test.item(), epoch)
Plot two scalars on same chart with tensorboardX:
Create two summaryWriter for two scalars
Add scalars instances to the summaryWriter respective; they must have same tag, e.g.: "LOSS"
For working code, please visit github: Examples with tensorboardX (See more_plots_one_chat.py)
Tutorial: TensorboardX