Logging histgram does not work

wandb --version && python --version && uname

• Weights and Biases version: 0.9.4
• Python version: 3.6.9
• Operating System: Ubuntu

Description

I am trying to log a histogram into wandb. The run appears on wandb, but the histogram is not there. Other stuff such as scalars or Images is logged properly. What is wrong?

What I Did

` import wandb import numpy as np

wandb.init(entity=“MyEntity”, project=“my project”, name=“testing”) a = np.random.randn(100) hist = np.histogram(a) h = wandb.Histogram(np_histogram=hist) wandb.log({“gradients”: wandb.Histogram(np_histogram=hist)}) `

[LeonOstrez]

@aidanjdonohue i did, but with previously storing to var, so something like this:

hist = np.histogram(data)
wandb_data['my_histogram'] = wandb.Histogram(np_histogram=hist)
wandb.log(wandb_data, step=epoch)

After looking into it more, i realized that if i open only that specific experiment/run in wandb (meaning that url would be: https://wandb.ai/USER/PROJECT/runs/RUNID?workspace=user-USER) i can find histogram, but if i am looking in project/workspace (where on left side is list of all experiments, meaning url is https://wandb.ai/USER/PROJECT?workspace=user-USER) then histogram doesnt exist.

I contacted customer service and after explaining it all in details got this response:

I’ll be taking on this ticket. I was able to recreate your situation.

wandb.Histogram behaves more similarly to a line plot as it does than a rich media type such as wandb.Image. This means that the 1d numpy array that is stored for your histogram will be aligned along the provided step access (creating a 2d array for which we plot on). That is why upon hover of each step you can see a floating tooltip which displays the Histogram.

As a result the histogram plot with multiple steps will not be plotted in the project page as there is no media panel chart which aligns (run x step x 1d histogram). I have made a ticket for the engineers about the addition of the step slider for histogram as an available behavior.

In the meantime, If you would like a histogram to be plotted with a step slider. I believe it would be best to log a graph (using our wandb.Plotly data type as an example) or image of the histogram for use with step slider.

Let me know if there is any confusion!

I hope this helps someone else with same issue 🤞

[LeonOstrez]

I’m getting same issue. The run appears on wandb, but the histogram is not there while all other tables/charts are ok.

I tried generating histogram from sequence:

wandb.Histogram([1,2,3])

and also i tried using np.histogram

hist = np.histogram(data)
wandb.Histogram(np_histogram=hist)

Weights and Biases version: 0.12.7 Python version: 3.8.10 Operating System: Ubuntu