Sum of array items into another array
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np
el 22 de Jun. de 2016
Comentada: Shameer Parmar
el 24 de Jun. de 2016
I need to find the sum of items within each of the 360 arrays and then make another array with just the sums.
8 comentarios
Kirby Fears
el 22 de Jun. de 2016
I understand that the values inside of speed1 and speed2 are numeric, but you wrote your example as "data.speed1". So are speed1 and speed2 contained in a workspace variable called data or not?
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Kirby Fears
el 22 de Jun. de 2016
Assuming data is a struct with fields speed1, speed2, etc.
sumArray = structfun(@sum,data);
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Más respuestas (2)
Guillaume
el 23 de Jun. de 2016
If your structure has fields other than the speed fields, you can loop over a hardcoded number of speed fields:
numspeed = 360;
speedsum = zeros(numspeed, 1);
for speedidx = 1:numspeed
speedsum(speedidx) = sum(data.(sprintf('speed%d', speedidx)));
end
0 comentarios
Shameer Parmar
el 23 de Jun. de 2016
for i=1:length(fields(data))
s(i) = sum(eval(['data.speed',num2str(i)]));
end
6 comentarios
Guillaume
el 23 de Jun. de 2016
1) Use fieldnames instead of fields. That won't solve the immediate problem as they both provide the same result, but fields is not supported whereas fieldnames is.
2) You get this error because your data has fields other than the 360 speed fields.
Shameer Parmar
el 24 de Jun. de 2016
Hello np..
I guess your length of fields(data) is more that 360, that why..
If yes, you can apply one more filter like..
for i=1:length(fields(data))
if i<=360
s(i) = sum(data.(['speed',num2str(i)]));
end
end
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