How to make a function that calculates percentage change in a vector

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Bryan Zhang
Bryan Zhang 2020-4-3
回答： KSSV 2020-4-3
i have a document called gdp.csv which contains a vertical vector of values. How would I make a script that returns the percentage change between every subsequent value?
x=csvread('gdp.csv')
for i=0; i++; i == length(x)-1
p = (x(i+1)-x(i))/(x(i))
endfor

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回答（1 个）

KSSV
KSSV 2020-4-3
Loop:
x=csvread('gdp.csv')
for i=1:length(x)-1
p = (x(i+1)-x(i))/(x(i))
end
Vector:
p = diff(x)./x(1:end-1) ;

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