strcat(strings) to call a variable or matrix
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I have a While loop that looks like this:
Zone1 = ...;
Zone2 = ...;
Zone3 = ...;
...
Zone9 = ...;
a = 1;
while a <= 9
TrueOrFalse = Subfunction(strcat('Zone',num2str(a)));
%Subfunction outputs 0 or 1
if TrueOrFalse == 0
break % end while loop
end % end if statement
a = a+1;
end % end while loop
Now, the problem I'm running into in Debug mode is that the strcat(strings) function is outputting a string that is correct, but it's not calling on the previously established variable or matrix.
What can I do to make that work?
采纳的回答
You want to store your zone data in a numeric array or a cell array, and then index it for passing the relevant data item to the sub function.
For numeric data:
zonesData = [100, 800, 1750] ;
for k = 1 : length( zonesData )
isOk = SubFunction( zonesData(k) ) ;
if ~isOk
break ;
end
end
For other types of data, e.g. strings:
zonesData = {'USA', 'CH', 'FR'} ;
for k = 1 : length( zonesData )
isOk = SubFunction( zonesData{k} ) ;
if ~isOk
break ;
end
end
4 个评论
David
2014-4-30
My point is that we almost never build a series of variable names which contain an index, precisely because we cannot index them (hence your attempt to build the name by concatenation). Instead, we build arrays or cell arrays, which can be indexed. If your zone-specific arrays aren't vectors or are vectors with varying sizes, you can build a cell array of these arrays:
zonesData = cell( 9, 1 ) ; % Prealloc if you know in advance the size.
zonesData{1} = [1,4,3,2] ;
zonesData{2} = [8,7,3,2,4,9,1] ;
zonesData{3} = [4,9] ;
...
Then the loop
for k = 1 : length( zonesData )
isOk = SubFunction( zonesData{k} ) ;
if ~isOk
break ;
end
end
will pass each array to SubFunction. When k equals 3, for example, zonesData{k} is the content of cell #3 of zonesData, which is the array [4,9].
David
2014-4-30
Cedric
2014-4-30
My pleasure!
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