using mean function to return a singular value of a row vector

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Jack 2023-10-26

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https://ww2.mathworks.cn/matlabcentral/answers/2038621-using-mean-function-to-return-a-singular-value-of-a-row-vector

编辑： Walter Roberson 2023-10-26

I have made a function that reads the mositure of soil using a soil sensor and I call this function in a main scripit to use the soil mositure how ever when I call the function in my main scripit I get 3 numbers returned to me from my function and am not sure why . My goal is to only get a single value returned to me from the function I call .was hoping someone could help me get the avg of the row vector x to be a singular value. I have posted my function I use to get the soil moisture reading :

function code :

function Current_soil_moisture =get_SoilMoisture(Object); 
%this function reads the volatge of the capactive mositure sensor , it reads the sensor volatge 8 times and stores the reading in a row vector 
% the avg of the volatge readings in the row vector is taken using mean function, the mean of the row vector gives us a more accuate reading of the sensor volatage 
i =1;  
while i==1 
    V1= readVoltage(Object,'A1'); 
    V2=readVoltage(Object,'A1');  
    V3=readVoltage(Object,'A1');
    V4=readVoltage(Object,'A1'); 
    V5=readVoltage(Object,'A1');
    V6=readVoltage(Object,'A1');
    V7=readVoltage(Object,'A1'); 
    V8=readVoltage(Object,'A1'); 
    x=[V1 V2 V3 V4 V5 V6 V7 V8];
    X=mean(x,"all"); 
    i=i+1; 
end 
Current_soil_moisture = X; 
fprintf('\n The current_soil_moisture is: \n %.2f',Current_soil_moisture ) 

and here is what I get in the command window when i call it

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Answer 1

Sam Chak 2023-10-26

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Hi Jack,

It could be the get_SoilMoisture(Object) function is nested in a for-loop that performs 3 iterations in the Main Script. Please check.

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Jack 2023-10-26

Mechatronics_Project_Live_Graph_Code.m

Hey thats what i was wondering to ive attcahed my main scrpit , i think my error is on line 141 as maybe the function isnt under the if get_SoilMoisture(Object) statement how ever im not sure , let me know what you think !

Jack 2023-10-26