Find average of an array for values > 0

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Cameron Bowyer on 12 Sep 2021

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Commented: stozaki on 12 Sep 2021

find average of array only for values > 0 and print using for loop and for where there is data (ie more than 0 values in the data)

i) sum of values

IF DATA > 0****** --> this is my main issue im stuck with

for i = 1:length(data)

sum = sum + data(i)

end

fprintf("%.2f\n", sum)

ii) average

if length(data) > 0

平均= sum/ length(data)

end

fprintf("%.3f\n", average)

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stozaki on 12 Sep 2021

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Hi,

What about the following processing?

                              data = [1 2 10 -38 -7 2 8 10 -5 1 0 -5 37];% example data
                             
                              idx = find(data > 0);% Index of values greater than 0
                             
                              result = mean(data(idx));% average

find

mean

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stozaki on 12 Sep 2021

If you use for and if statements, you can do the following:

                                   data = [1 2 10 -38 -7 2 8 10 -5 1 0 -5 37];% example data
                                  
                                   temp = 0;% initialize temp
                                  
                                   count = 0;% initialize count
                                  
                                   forN = 1:length(data)
                                  
                                   ifdata(N) > 0
                                  
                                   temp = data(N) + temp;
                                  
                                   count = count + 1;
                                  
                                   else
                                  
                                   % nop
                                  
                                   end
                                  
                                   end
                                  
                                   平均= temp/count
                                  
                                     平均= 8.8750

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