# How can I subtract elements in an array from the element before it.

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Aman Kumar el 26 de Mzo. de 2024
Comentada: Aman Kumar el 27 de Mzo. de 2024
Hi guys,
I want to know how to subtract every element in an array from the element before it, for example element 2-element1 and element 3-element2 and so on.
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John D'Errico el 26 de Mzo. de 2024
help diff
DIFF Difference and approximate derivative. DIFF(X), for a vector X, is [X(2)-X(1) X(3)-X(2) ... X(n)-X(n-1)]. DIFF(X), for a matrix X, is the matrix of row differences, [X(2:n,:) - X(1:n-1,:)]. DIFF(X), for an N-D array X, is the difference along the first non-singleton dimension of X. DIFF(X,N) is the N-th order difference along the first non-singleton dimension (denote it by DIM). If N >= size(X,DIM), DIFF takes successive differences along the next non-singleton dimension. DIFF(X,N,DIM) is the Nth difference function along dimension DIM. If N >= size(X,DIM), DIFF returns an empty array. Examples: h = .001; x = 0:h:pi; diff(sin(x.^2))/h is an approximation to 2*cos(x.^2).*x diff((1:10).^2) is 3:2:19 If X = [3 7 5 0 9 2] then diff(X,1,1) is [-3 2 -3], diff(X,1,2) is [4 -2 9 -7], diff(X,2,2) is the 2nd order difference along the dimension 2, and diff(X,3,2) is the empty matrix. See also GRADIENT, SUM, PROD. Documentation for diff doc diff Other uses of diff codistributed/diff iddata/diff tall/diff datetime/diff sym/diff tireModel/diff duration/diff symbolic/diff umat/diff gpuArray/diff tabular/diff
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Dyuman Joshi el 27 de Mzo. de 2024
Accepting the answer indicates that your problem has been solved (which can be helpful to other people in future) and it awards the volunteer with reputation points for helping you.
You can accept only 1 answer for a question, but you can vote for as many answers as you want. Voting an answer also provides reputation points.
Aman Kumar el 27 de Mzo. de 2024
Yes I will definitely accept it sorry about that

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