Accesing structure using a function

Dear all,

I have a function that needs to treat data coming from a structure, and I want to have several inputs indicating which branch of the structure is the one to be treated:

function total = totalCampus(campus,building,year,var)

total=getfield(campus,(year),(building),(var))

end

This is just the first line of the function, where I want to call the specific column of the table in the structure, using dynamic fieldnames, but I can't manage. Any clue?

best regards,

Mario

Answer 1

[Adam]

total = campus.( building ).( year ).( var );

should work fine, assuming campus is your struct and that is a branch of the struct.

[Mario Prinetti]

function total = totalCampus(campus,year,type,var)

switch campus

case 1

building={'sabatini','quevedo','betancourt','biblioAud','benet'};

total=zeros(34492,length(building));

for n=1:length(building)

total(:,n)=leganes.(year).building{n}.(type).(var);

end

total=nansum(total(total>0),'all');

This is my actual code, used to add up all values of the selected variable (it ahhas a second case for another campus). The issue is it doesn't seem to read the year correctly (the name of the structure branch is a2017 for example). once I type tot=totalCampus(1,a2017,total,PotenciaActivaTotal_kW); it tells me that the function or variable a2017 is undefined

[Adam]

Is it defined?

[Stephen23]

"once I type tot=totalCampus(1,a2017,total,PotenciaActivaTotal_kW); it tells me that the function or variable a2017 is undefined "

You are typing those inputs without single quotes, which tells MATLAB that they are variable/function/class/etc. names. You need to use single quotes to define character vectors.