# How to draw a histogram of my data?

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I have two vectors a and b, where they are as follows:

b=1:100;

a=1e-18:1e-15;

I want to draw a histogram of them such that a is on x-axis and b is on y-axis as shown in the given attachement.

### Accepted Answer

Jon
on 6 Oct 2020

I'm not really sure what you are trying to make a histogram of. It looks like you just want to know how many equally spaced values there are between logarithmically spaced intervals. In this case you don't need the b vector, other than to look at its maximum value which would just set the maximum horizontal scale value. To make sure you don't exceed this value you have to choose your increment properly. Maybe you are looking for something like this?

numBins = 20;

maxCount = 100;

% calculate increment so that maxCount will not be exceeded

delta = (1e-15 - 1e-18)/(numBins*maxCount);

% generate your equally space data

a=1e-18:delta:1e-15;

% make your histogram

histogram(a,numBins)

set(gca,'xscale','log') %scale the x-axis logarithmically

##### 7 Comments

Jon
on 15 Oct 2020

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