Find the average for a matrix excluding data in the first column

I have a 20x6 matrix and I want to find the average value of the entire range of values (sensor data) but not including the first column (time values) - how can I do this?

This gives me 5 averages (one for each of the sensor data columns).

Totalave=mean(SENSOR(:,2:6))

Thanks in advance

Answer 1

[Johannes Hougaard]

You could simply add another mean around it:

totalave = mean(mean(sensor(:,2:6)));

Or you could introduce a temporary variable (e.g. sensor_data) and use the (:) operator to create a column vector rather than an n-by-m matrix

sensor_data = SENSOR(:,2:end);
Totalave=mean(sensor_data(:));

Answer 2

[Image Analyst]

If you have the Image Processing Toolbox, simply use mean2() instead of mean():

Totalave = mean2(SENSOR(:, 2 : 6))