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tensorflowtensorboard
Kathryn
Kathryn

Reputation: 31

Tensorflow summary scalars not showing up in tensorboard

I have used tensorboard in several projects previously and it has worked great. When I run those projects now it still works. However, in a new project the summary scalars I have saved will not show up. The graph is there and appears correct but the "No scalar data was found" dialogue is under the scalars tab. I tried to write the simplest code I could think of as a test and it's still not working:

import tensorflow as tf

tf.reset_default_graph()

g = tf.Graph()

with g.as_default():

    y = tf.Variable(1)
    initialize = tf.global_variables_initializer()
    tf.summary.scalar('thing',y)

sess = tf.InteractiveSession(graph=g)
sess.run(initialize)

merged = tf.summary.merge_all()

writer = tf.summary.FileWriter("path",g)

for i in range(10):
    summary = sess.run(merged)
    writer.add_summary(summary,i)

sess.close()

I'm thinking this should just give me a constant y value over 10 steps, but no scalars in tensorboard. Have I made some mistake?

Upvotes: 3

Views: 4497

Answers (1)

Maxim
Maxim

Reputation: 53758

Try to change the graph definition to:

with g.as_default():
  y = tf.Variable(1)
  tf.summary.scalar('thing', y)
  initialize = tf.global_variables_initializer()

I.e., first define a summary op, then the initialization op. This way it appears on tensorboard:

tensorboard

It's also possible that the summary wasn't flushed, in this case writer.flush() will help.

Upvotes: 0

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