# Shrink a 1-D array (vector) by removing all the columns with a value of zero

9 views (last 30 days)
David on 20 Mar 2012
Commented: Saad Rehman on 7 May 2019
SimpleArray = [1,0,2,0,3,0,4,0,5,0]
Desired result
NewSimpleArray = [1,2,3,4,5]

Jacob Halbrooks on 20 Mar 2012
Here is a good solution:
NewSimpleArray = SimpleArray(SimpleArray ~= 0)
Kaveh Allahdin on 14 Nov 2018
How would you do this in simulink?
Saad Rehman on 7 May 2019
thanks brother

Dr. Seis on 20 Mar 2012
SimpleArray(SimpleArray==0) = [];

David on 20 Mar 2012
Thanks for the answers and for showing me the previous discussion string (I didn't think this was the first time this question was asked)

seif seif on 21 Jan 2018
Edited: seif seif on 21 Jan 2018
Using nonzeros is also very simple (note that the output is a column vector):
NewSimpleArray = nonzeros(SimpleArray)
NewSimpleArray =
1
2
3
4
5
Image Analyst on 31 Aug 2018
That changes the shape from a row vector to a column vector. However it can be fixed with the code below:
SimpleArray = [1,0,2,0,3,0,4,0,5,0] % Row Vector
NewSimpleArray = nonzeros(SimpleArray) % Creates column vector.
% Reshape back into a row vector.
NewSimpleArray = reshape(NewSimpleArray, 1, [])
saber kazemi on 12 Dec 2018
What if the output is still a matrix after removing zero elements?

Salam Ismaeel on 31 Aug 2018
Simply by:
X(X==0)=[]

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