# Mean of Multiple Data

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Tesa on 25 Jan 2013
Hey, I am a newbie in MATLAB, wanna ask a question: I have a data of frequency (column 1) and the impedance (column 2), and I did multiple measurements, let's say 5 measurements.
I want to plot the graph of the average value of the impedance in each frequency. I tried to find the mean of it, but it turns out that the coding I did find the average of the whole impedance (so i only got 1 average value, it's suppose to be 1 average value for each frequency).
Can somebody help me with the code? I use the .txt files as the data source, by the way.
Thank you for the help.

Evgeny Pr on 25 Jan 2013
Edited: Evgeny Pr on 25 Jan 2013
frequency = [1, 2, 3, 4, 5, 6]
impedance = [6 2 7 5 6 7
10 9 5 1 7 9
7 8 4 7 4 3
6 2 4 6 7 2
2 2 10 4 10 11]
meanImpedance = mean(impedance, 1) % Rows - measurements
plot(frequency, meanImpedance)

Tesa on 25 Jan 2013
thanks! :D you help a lot :)
Tesa on 28 Jan 2013
I've got the feedback like this: Undefined function 'load_measurement_data' for input arguments of type 'char'. Is there something wrong? Thanks :)
Tesa on 28 Jan 2013
and also, what does this one mean? meanImpedance = mean(impedances, 2); Thanks!