# Multiply structure by a constant

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rockstar49 il 12 Gen 2023
Commentato: Bora Eryilmaz il 12 Gen 2023
Like to multiply a structure with fields by a constant, but it giving an error. Is there another way to do this?
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### Risposte (2)

Matt J il 12 Gen 2023
Modificato: Matt J il 12 Gen 2023
s.a=1; s.b=2,
s = struct with fields:
a: 1 b: 2
S=structfun(@(f)10*f,s,'uni',0) %multiply by 10
S = struct with fields:
a: 10 b: 20
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Bora Eryilmaz il 12 Gen 2023
You have to cycle through the individual fields of the structure:
s = struct('a', [1 2 3 4], 'b', -1)
s = struct with fields:
a: [1 2 3 4] b: -1
for f = fieldnames(s)'
s.(f{1}) = 4 * s.(f{1});
end
s
s = struct with fields:
a: [4 8 12 16] b: -4
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rockstar49 il 12 Gen 2023
It is mainly 1 by 1 value, do you still need to do this as i have variable names
Bora Eryilmaz il 12 Gen 2023
Not sure what you mean by "variable names". Are you referring to the variable name of the struct or the fields of the struct?

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