MATLAB: How can ı calculate the mean of an interval

mean of a specified interval

There are 300 elements in my vector (vector A). I want to calculate the mean of all the elements from 200th to 300th element. How do I do that?

Best Answer

A = rand(300,1) ;
iwant = mean(A(200:300)) ;

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MATLAB: How to take the average of every 50th term in a 2500×1 vector

s=rand(2500,1);  %2500x1 vector
Out1=mean(reshape(s,[50 50])); %mean of every 50 values
out2=mean(s(50:50:2500)) % mean of every 50th value

MATLAB: Reading Table at fixed interval

Using the indices 1:2:10 is very useful, if you need the indices 1,3,5,7,9. In all other cases it is not useful in any way.

Perhaps you want to set every 2nd value of a vector to 0:

x = rand(1, 100);
x(1:2:end) = 0;

Or maybe it is enough to plot every 10th element:

t = linspace(0, 2*pi, 10000);
x = sin(t);
plot(t(1:10:end), x(1:10:end))

The step width need not be an integer:

x = 0:0.1:1

There is an infinite number of applications of using the colon operator with 2 inputs. If you need a vector with a constant step size, it is perfectly useful. So what exactly is your question?

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Related Solutions

MATLAB: How to take the average of every 50th term in a 2500×1 vector

MATLAB: Reading Table at fixed interval

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