# How to draw histogram with known values and their ratio?

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Wenyi Xiao on 7 Jul 2019
Commented: Wenyi Xiao on 7 Jul 2019
Row 2 is the ratio and Row 3 are X values.
My question is how to draw a distribution plot with known X values and their specific values of ratio.

Image Analyst on 7 Jul 2019
Do you mean row? Or column?
Have you tried
histogram(data(:, 2));
And I really have no idea what "a distribution plot with known X values and their specific values of ratio." is. Maybe you can re-word that to explain it better.
But in general histogram() creates and plots distributions as bar charts. Or you can use histcounts() followed by bar().
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Image Analyst on 7 Jul 2019
Still not clear, but this seems to be what you said:
edges = [-inf, 10, 20, 30, inf];
histogram(X(:, 3), edges); % Histogram of col3 with specified bin edges.
column2Sum = sum(X(:, 2)) % Sum up column 2.
Wenyi Xiao on 7 Jul 2019
But I want to present the specific values of each probability.
Column 2 represents the probability.
I can round the Column 3 and I want to group these values. For example, 10,12,14,16 and 18 should be 10, and the probability of this unit is summing up the 0.0167,0.0173,0.0185,0.0204 and 0.0235.