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How to make normal distribution curve from the bar chart?

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  • I need to make the distribution curve as shown in the below image from the data of the bar chart.
  • I have the bar chart data file. Is there any possiblity to make the ditribution curve directly.

Answers (3)

Rik on 9 May 2023
Your data resolution is too low now that you have this bar chart. Unless you have the actual underlying data it is not possible to make a smooth curve.
What you can do to smooth the curve is to insert zeros between the bars and use a convolution to spread out the data.

Walter Roberson
Walter Roberson on 9 May 2023
Your only hope of creating a distribution curve would be if you had a model for the distribution and you used the data to fit the model parameters.
For what you have, I would suggest spline to create a smooth curve joining what you have.

Image Analyst
Image Analyst on 9 May 2023
That's not a single Gaussian you have there. There are at least two of them. See attached code that can fit the data (your histogram counts) to any specified number of Gaussian curves.




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