Finding structure array entries with certain values

433 Ansichten (letzte 30 Tage)
Tom
Tom am 7 Mär. 2014
Bearbeitet: Thomas am 7 Mär. 2014
Hello,
What is the way to find all structure array entries with specific values?
E.g. I tried:
find(cell_data.CN == 4)
But that returns:
Error using ==
Too many input arguments.
Kind regards,
Tom

Akzeptierte Antwort

Jos (10584)
Jos (10584) am 7 Mär. 2014
I assume that celldata is a structure array
% create some example data
for k=1:10, celldata(k).CN = ceil(4*rand) ; end
% method 1: easy
allCN = [celldata.CN] % comma separated list expansion
tf1 = allCN == 4
index1 = find(tf1)
% method 2: very flexible
fun = @(x) celldata(x).CN == 4 % useful for complicated fields
tf2 = arrayfun(fun, 1:numel(celldata))
index2 = find(tf2)
Both methods can be written as one-liners.

Weitere Antworten (1)

Thomas
Thomas am 7 Mär. 2014
You could use something like this
strs={'1' '2' '3' '4'}
ind=find(ismember(strs,'4'))
>> ind =
4
  2 Kommentare
Tom
Tom am 7 Mär. 2014
What is strs? I tried replacing strs with cell_data.CN there and got
Error using ismember (line 68) Too many input arguments.
So I don't think I understand properly your suggestion...
Thomas
Thomas am 7 Mär. 2014
Bearbeitet: Thomas am 7 Mär. 2014
strs in the array of cells.. that I am defining above the find command to give the example..
try
strs ={cel_data.CN};
ind=find(ismember(strs,'4'))

Melden Sie sich an, um zu kommentieren.

Kategorien

Mehr zu Resizing and Reshaping Matrices finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by