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

SimpleArray = [1,0,2,0,3,0,4,0,5,0]

Desired result

NewSimpleArray = [1,2,3,4,5]

Answer 1

[Jacob Halbrooks]

Here is a good solution:

NewSimpleArray = SimpleArray(SimpleArray ~= 0)

[Jacob Halbrooks]

For a good discussion of different solutions to this type of problem, see the Newsgroup thread here:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/154622

[Abdoulaye SAADOU YAYE]

Thanks.

[Kaveh Allahdin]

How would you do this in simulink?

[Saad Rehman]

thanks brother

Answer 2

[Dr. Seis]

SimpleArray(SimpleArray==0) = [];

Answer 3

[David]

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)

Answer 4

[seif seif]

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]

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]

How about matrix?

What if the output is still a matrix after removing zero elements?

Answer 5

[Salam Ismaeel]

Simply by:

X(X==0)=[]