How do I find the percentage of a number of values within a certain range?

I have a number of values which represent the differences between two surfaces. I would like to know the percentage of values which lie within a certain range e.g 0.05 and -0.05? How would I go about finding these values and then working out what percentage of the total?

Answer 1

[Stephen23]

>> M = rand(6,7)-0.5; % matrix of fake data
>> X = -0.05<M & M<0.05; % check conditions
>> nnz(X)/numel(M)
ans =  0.095238

9.5% of the values of M are within the given conditions.

Answer 2

[Guillaume]

sum(x > -0.05 & x < 0.05) / numel(x)  %number of values between -0.05 and 0.05 divided by total number

Or if you want to do that with several interval, use histcounts with the 'Normalization', 'probability' option.

histcounts(x, -3.5:3.5, 'Normalization', 'probability'); %for example for 6 bins