How do I check if all numbers in a vector are the same?

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I have a row vector A. I'd like to verify whether all numbers in this vector are the same. How can I do this?

Accepted Answer

Stephen23 on 1 Apr 2021
Edited: Stephen23 on 1 Apr 2021
min(A)==max(A) % does not work for NaN
range(A)==0 % RANGE requires the statistics toolbox
  1 Comment
Robert Brown
Robert Brown on 1 Apr 2021
Stephen actually gave not only 1 but what appears to be 3 solutions to the problem ! very good ! (overachiever !)
I don't seem to have range(A). Is that in a newer version of MATLAB? or is it in a toolbox?

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