How to draw histogram with known values and their ratio?

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.

Answer 1

[Image Analyst]

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().

[Wenyi Xiao]

Sorry, it should be column

I want to plot a histogram. Values from Column 3 can be grouped together, and Column 2 are their probabilities. If X values are grouped, values from Column 2 should be summed up.

For example, values from Column 3 can be grouped as 10,20,30 and so on.

How can I draw this plot ?

Can you explain how to use histcounts()?

[Image Analyst]

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]

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.