What does ix=ismembe​r(vars,["s​tate","sou​rce"])| contains(vars,["lat", "lon", "timestamp", "damage", "event"]); do?

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Marcel345614
Marcel345614 2022-1-13
评论： Stephen23 2022-1-13
What does the code line
ix=ismember(vars,["state","source"])| contains(vars,["lat", "lon", "timestamp", "damage", "event"]);
in the Matlab Example https://ch.mathworks.com/de/videos/importing-your-data-into-matlab-1567682718882.html actually do?
As far as I understand, the ix of each row is 1 when "state" and "source" or ["lat", "lon", "timestamp", "damage", "event"] are in the vars-string. Is this correct?
  1 个评论
Stephen23
Stephen23 2022-1-13
Where any element of vars is either:
  • equal to "state"
  • equal to "source"
  • contains "lat"
  • contains "lon"
  • contains "timestamp"
  • etc.
the corresponding element of the output IX will be TRUE, otherwise the element will be FALSE.

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KSSV
KSSV 2022-1-13
idx1=ismember(vars,["state","source"]) ; % gives logical indexing where state, source are presnt in vars
idx2 = contains(vars,["lat", "lon", "timestamp", "damage", "event"]); % gives logical indices where loat, lon etc are present in vats
ix = idx1 | idx2 ; % gives logical indexing of or of the above indices
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