clearml-docs/docs/webapp/webapp_exp_comparing.md

title
Comparing Tasks

The ClearML Web UI provides features for comparing tasks, allowing to locate, visualize, and analyze the differences in task results and their causes. You can view the differences in:

• Details - Compare task source code, package versions, models, configuration objects, and other details.
• Hyperparameters
  • Values - Compare parameters and their values
  • Parallel coordinates - View the impact of hyperparameters on selected metrics
  • Scatter plot - View the correlation between a selected hyperparameter and metric
• Scalars - Compare task metrics:
  • Values - Compare minimal, maximal or last reported values in a concise comparison table
  • Graphs - Overlay compared tasks in a single graph per metric
• Plots - Compare task plots
• Debug samples - Compare debug samples by iteration

With these comparisons, you can investigate the impact of different setups on your task results, and gain insight for crafting future tasks.

Selecting Tasks to Compare

To select tasks to compare:

1. Go to a task table that includes the tasks to be compared.
2. Select the tasks to compare. Once multiple tasks are selected, the batch action bar appears.
3. In the batch action bar, click COMPARE.

The comparison page opens in the DETAILS tab with the tasks compared side by side.

Modifying Task Selection

Click the TASKS button to view your currently compared tasks. Click X on a listed task to remove it from the comparison.

You can add/remove tasks to your comparison:

1. Click the + button in any of the comparison tabs. This opens up a window with a task table with the currently compared tasks at the top.

   

2. Find the tasks to add by sorting and filtering the tasks with the appropriate column header controls. Alternatively, use the search bar to find tasks by name.

3. Select tasks to include in the comparison (and/or clear the selection of any tasks you wish to remove).

4. Click APPLY.

Sharing Comparison Page

To share a comparison page, copy the full URL from the address bar and send it to a teammate to collaborate. They will get the exact same page (including selected tabs etc.).

Embedding Comparison Visualization

To embed plots and debug samples from the comparison pages in your Reports, hover over the resource and click , which will copy to clipboard the embed code to put in your Reports. These visualizations are updated live as the tasks update. The Enterprise Plan and Hosted Service support embedding resources in external tools (e.g. Notion).

Comparison Modes

The comparison pages provide the following views:

• Side-by-side textual comparison
• Tabular scalar comparison
• Parallel coordinates for parameter impact on metric
• Scatter plot
• Overlaid plot comparison
• Side-by-side debug sample and plot comparison

Side-by-side Textual Comparison

In the Details and Hyperparameters (Values view) tabs, you can view differences in the tasks' parameters' nominal values. The Details tab displays the tasks' execution details (source code, uncommitted changes, python packages), models, artifacts, configuration objects, and additional general information. Hyperparameters (Values view) displays the tasks' hyperparameter and their values.

The tasks are laid out in vertical cards, so each field is lined up side-by-side. The task on the left is used as the base task, to which the other tasks are compared. You can set a new base task in one of the following ways:

• Hover and click on the task that will be the new base.
• Hover and click on the new base task and drag it all the way to the left

The differences between the tasks are highlighted. Easily locate value differences by clicking click (previous diff) or (next diff) in the tab header. Obscure identical fields by switching on the Hide Identical Fields toggle.

Use the search bar to find any field names or values. Lines that match the search query are highlighted, and you can navigate between search results.

Tabular Scalar Comparison

The Scalars tab Values view lays out the tasks' metric values in a table: a row per metric/variant and a column for each task. Select from the dropdown menu which metric values to display:

• Last Values: The last reported values for each task
• Min Values: The minimal value reported throughout the task execution
• Max Values: The maximal value reported throughout the task execution

You can download the scalar comparison table as a CSV file by clicking .

Switch on the Show row extremes toggle to highlight each variant's maximum and minimum values.

Parallel Coordinates Mode

The Hyperparameters tab's Parallel Coordinates comparison shows tasks' hyperparameter impact on specified metrics:

1. Under Performance Metrics, select metrics to compare for
2. Select the values to use for each metric in the plot (can select multiple):
   • LAST - The final value, or the most recent value, for currently running tasks
   • MIN - Minimal value
   • MAX - Maximal value
3. In Parameters, select the hyperparameters to compare.

For example, plot the metric/variant accuracy/total against the hyperparameters base_lr, dropout, and number_of_epochs.

To focus on a specific task, hover over its name in the graph legend.

To hide a task, click its name in the graph legend (click again to bring back).

Scatter Plot

The Hyperparameters tab's Scatter Plot comparison shows tasks' correlation between a selected hyperparameter and metric.

To show the value distribution:

• Select the Plot Axes:
  1. Under Y-axis select the metric and the metric values to use in the plot:
     • LAST - The final value, or the most recent value, for currently running tasks
     • MIN - Minimal value
     • MAX - Maximal value
  2. Under X-axis select the hyperparameter.

Hovering over each datapoint in the resulting plot will show the task name and the metric and parameter value for that point. You can add additional metrics and hyperparameters values to the datapoint tooltip through ADDITIONAL DATA POINT INFORMATION.

Plot Comparison

The Scalars (Graph view) and Plots tabs compare tasks' plots.

The Scalars tab displays scalar values as time series line charts. The Plots tab compares the last reported iteration sample of each metric/variant combination per compared task.

Line, scatter, box, and bar graphs are compared by overlaying each metric/variant from all compared tasks' into a single comparative plot.

For overlaid plots, use Group by to select how to group plots:

• Metric - All variants for a metric appear on the same plot.

  

• Metric+Variant (default) - Every variant appears on its own plot.

  

Other plot types that are not overlaid are displayed separately for each task:

All single value scalars are plotted into a single clustered bar chart under the "Summary" title, where each cluster represents a reported metric, and each bar in the cluster represents a task.

Hover over plots to access plot controls (see Scalar Plot Tools).

Side-by-side Debug Sample Comparison

Compare debug samples at different iterations to examine how your tasks perform throughout their execution.

You can view debug samples by metric in the reported iterations. Filter the samples by metric by selecting a metric from the dropdown menu above the samples. The most recent iteration appears first. To navigate between iterations, click (older images), (newer images), or (newest images).

Click in order to synchronize iteration and metric selection across tasks. For example, if you select a metric for one task's debug samples, the same metric will be automatically selected for the rest of the tasks in the comparison.

Open a debug sample (image, audio, or video) in the viewer or player, by clicking the thumbnail.

To move to the same sample in another iteration, click (previous), (next), or move the slider.