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 年 1 月 13 日
コメント済み: Stephen23 2022 年 1 月 13 日
What does the code line
ix=ismember(vars,["state","source"])| contains(vars,["lat", "lon", "timestamp", "damage", "event"]);
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 件のコメント
Stephen23
Stephen23 2022 年 1 月 13 日
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 年 1 月 13 日
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
  6 件のコメント
Stephen23
Stephen23 2022 年 1 月 13 日
"Why are there two functions, which do the same thing?"
They don't do the same thing.
Marcel345614
Marcel345614 2022 年 1 月 13 日
Thanks!
What about my second question? (Sorry, it seems that I have edited to late)

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