Adding only present variables
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Hi Matlab friends, you guys are the best! What I am trying to do is some up a bunch of variable values, however, if the variable isn't present, the program crashes. How do I make it so it only sums the present variable values.
Here is my code:
evalin('base','save LSCvars.mat');
load LSCvars.mat
T1 = Q30 + Q29 + Q28 + Q27 + Q26 + Q25 + Q24
assignin('base','T1',T1)
T2 = D1 + D2 + D3 + D4 + D5 + D6 + D7 + D8
assignin('base','T2',T2)
T3 = (B1 + B2 + B3 + B4 + B5 + B6 + B7 + B8)/T1
assignin('base','T3',T3)
Thanks!!!
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Respuesta aceptada
Walter Roberson
el 5 de Sept. de 2012
Assign 0's to the variables before you do the load(), so that they will be sure to exist.
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Más respuestas (1)
Image Analyst
el 6 de Sept. de 2012
Editada: Image Analyst
el 6 de Sept. de 2012
Don't use evalin and assignin. Read in the mat file, then go through all the variables you expect to be there. If it's there, add it to your "T" variables. If it's not there for some reason, then nothing will get added.
T1 = 0;
T2 = 0;
T3 = 0;
storedStructure= load('LSCvars.mat')
hasField = isfield(storedStructure, 'Q24');
if hasField
T1 = T1 + Q24;
end
hasField = isfield(storedStructure, 'Q25');
if hasField
T1 = T1 + Q25;
end
and so on for the other T's and Q's.
1 comentario
Walter Roberson
el 6 de Sept. de 2012
T1 = 0;
for field_name = {'Q24', 'Q25', 'Q30'} %etc
if isfield(storedStructure, field_name)
T1 = T1 + storedStructre.(field_name);
end
end
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