README.md
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# tensorboard-chainer
Write tensorboard events with simple command.
including scalar, image, histogram, audio, text, graph and embedding.
This is based on [tensorboard-pytorch](https://github.com/lanpa/tensorboard-pytorch).
## Usage
Install tensorflow.
```
pip install tensorflow
```
Execute demo.py and tensorboard.
Access "localhost:6006" in your browser.
```
cd examples
python demo.py
tensorboard --logdir runs
```
## Scalar example
![graph](https://raw.githubusercontent.com/neka-nat/tensorboard-chainer/master/screenshots/scalar.png)
## Histogram example
![graph](https://raw.githubusercontent.com/neka-nat/tensorboard-chainer/master/screenshots/histogram.png)
## Graph example
![graph](https://raw.githubusercontent.com/neka-nat/tensorboard-chainer/master/screenshots/graph.gif)
## Name scope
Like tensorflow, nodes in the graph can be grouped together in the namespace to make it easy to see.
```python
import chainer
import chainer.functions as F
import chainer.links as L
from tb_chainer import name_scope, within_name_scope
class MLP(chainer.Chain):
def __init__(self, n_units, n_out):
super(MLP, self).__init__()
with self.init_scope():
self.l1 = L.Linear(None, n_units) # n_in -> n_units
self.l2 = L.Linear(None, n_units) # n_units -> n_units
self.l3 = L.Linear(None, n_out) # n_units -> n_out
@within_name_scope('MLP')
def __call__(self, x):
with name_scope('linear1', self.l1.params()):
h1 = F.relu(self.l1(x))
with name_scope('linear2', self.l2.params()):
h2 = F.relu(self.l2(h1))
with name_scope('linear3', self.l3.params()):
o = self.l3(h2)
return o
```
How to save the logs using this model is shown below.
`add_all_variable_images` is the function that saves the Variable's data in the model that matches the pattern as an images.
`add_all_parameter_histograms` is the function that save histograms of the Parameter's data in the model that match the pattern.
```python
from datetime import datetime
from tb_chainer import SummaryWriter
model = L.Classifier(MLP(1000, 10))
res = model(chainer.Variable(np.random.rand(1, 784).astype(np.float32)),
chainer.Variable(np.random.rand(1).astype(np.int32)))
writer = SummaryWriter('runs/'+datetime.now().strftime('%B%d %H:%M:%S'))
writer.add_graph([res])
writer.add_all_variable_images([res], pattern='.*MLP.*')
writer.add_all_parameter_histograms([res], pattern='.*MLP.*')
writer.close()
```
## Reference
* [tensorboard-pytorch](https://github.com/lanpa/tensorboard-pytorch)
* [tensorboard_logger](https://github.com/TeamHG-Memex/tensorboard_logger)
* [tfchain](https://github.com/mitmul/tfchain)