A Bar Chart displays the percentage of a specific option among the subset of responses that include that question

[JaneSjs]

User Issue: T15958 - SurveyJS Dashboard - Checkbox question displays percentages with wrong base
https://surveyjs.answerdesk.io/internal/ticket/details/T15958

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A Bar Chart displays the percentage of a specific option among the subset of responses that include that question. It is expected that the chart calculates percentages based on the total number of survey submissions, considering all the responses as part of the dataset.

Consider this example: View CodeSandbox.

const surveyResults = [
  {
    question1: 1,
    question2: ["Item 2"],
  },
  {
    question1: 2,
    question2: ["Item 2"],
  },
  {
    question1: 3,
    question2: ["Item 1"],
  },
  {
    question1: 4,
  },
  {
    question1: 5,
  },
];

You can see that a survey was submitted five times, however, the chart calculates the percentage only over those three question2 submissions:

It is expected that the chart calculates the percentage based on all survey submittions. So it should appear as follows:

[JaneSjs]

SurveyJS Dashboard displays percentage of a specific option among the subset of responses that include the related question. We do this because when there are many submissions, the total number might make percentages less meaningful.

Therefore, a Bar Chart displays percentages based on the subset of responses with that specific question. We don't plan to change this for now but may reconsider in the future.