Hello,
I have a question about the signal smoothing example given in the documentation of Matlab.
load bostemp
days = (1:31*24)/24; plot(days, tempC) axis tight ylabel('Temp (\circC)') xlabel('Time elapsed from Jan 1, 2011 (days)') title('Logan Airport Dry Bulb Temperature (source: NOAA)')
I understand that this example wants to emphasize that the measurements are taken 24 hours a day, 31 days for January. So the variable 'days' ranges from 1 to 31*24. But why divide it by 24?
Also,
hoursPerDay = 24; coeff24hMA = ones(1, hoursPerDay)/hoursPerDay; avg24hTempC = filter(coeff24hMA, 1, tempC); plot(days,[tempC avg24hTempC])
I understand that this example refers to the moving average of length N (in this case N = 24). I don't understand why there is a need to set N = 24. Why can't it be just N = 1?
ANSWER
Matlabsolutions.com provide latest MatLab Homework Help,MatLab Assignment Help for students, engineers and researchers in Multiple Branches like ECE, EEE, CSE, Mechanical, Civil with 100% output.Matlab Code for B.E, B.Tech,M.E,M.Tech, Ph.D. Scholars with 100% privacy guaranteed. Get MATLAB projects with source code for your learning and research.
For the first question, the data is recorded hourly, so the samples are done in 1:31*24. However, in the display, the x axis is labeled as days, that's why it needs to be divided by 24. For the second question, the N is basically the window length you use to smooth the data.....
SEE COMPLETE ANSWER CLICK THE LINK
Matlabsolutions.com provide latest MatLab Homework Help,MatLab Assignment Help for students, engineers and researchers in Multiple Branches like ECE, EEE, CSE, Mechanical, Civil with 100% output.Matlab Code for B.E, B.Tech,M.E,M.Tech, Ph.D. Scholars with 100% privacy guaranteed. Get MATLAB projects with source code for your learning and research.
For the first question, the data is recorded hourly, so the samples are done in 1:31*24. However, in the display, the x axis is labeled as days, that's why it needs to be divided by 24.
For the second question, the N is basically the window length you use to smooth the data.....
SEE COMPLETE ANSWER CLICK THE LINK
Comments
Post a Comment