MATLAB: How to calculate mean to an equal area in Matlab

equal areamean

I have 900000 time data and 900000 speed data. I need to calculate the mean speed for each 30secs and plot them. How can I get that? Thank you!

Best Answer

n = 3; % or whatever number of samples you need, must be divisible into size of data
time_average = mean(reshape(time_data,n,[]));
speed_average = mean(reshape(speed_data,n,[]));
plot(time_average,speed_average)

Related Solutions

MATLAB: How to calculate the coefficient of variation in Matlab

N=30;
mn=mean(reshape([time(:),speed(:)],N,[]));  
sd=std(reshape([time(:),speed(:)],N,[]));
cv=reshape(mn./sd,[],N);

returns CV of time, speed as columns in cv.

MATLAB: Time-series data

The 'simplest' way to do a series of mean values is to use a for loop with the mean function.

nmean = 50; % Number of values you would like to average at a time
for i = 1:2*length(data)/nmean
    average(i) = mean(data((i-1)*nmean/2:(i-1)*nmean/2+nmean));
end

You may run into an issue with index exceeding matrix dimensions near the end of your data set. If this happens, just reduce the maximum i value by changing the bounds of the loop. If you are not sure how to do that look up the basics of a for loop here.

Best Answer

Related Solutions

MATLAB: How to calculate the coefficient of variation in Matlab

MATLAB: Time-series data

Related Question