character to variable that already exists in the workspace
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Ziv Kassner
am 25 Feb. 2015
Bearbeitet: Stephen23
am 12 Sep. 2023
I want to make a "for loop" that uses some variables that looks like this: score1, score2, score3,...score21. My problem is that I cannot connect both string 'score' and the number (represented by 'i') as a whole string. the script is:
for i=1:21
[r c]=size(strcat('score', num2str(i)));
for j=2:r
strcat('cscore', num2str(i))(j-1)=strcat('score', num2str(i))(j)+strcat('score', num2str(i))(j-1);
end
end
after this, the value of this variable is a 'char' rather that a string.
thank you, Ziv.
1 Kommentar
Akzeptierte Antwort
Geoff Hayes
am 25 Feb. 2015
Bearbeitet: Geoff Hayes
am 25 Feb. 2015
Ziv - use sprintf to "concatenate" the number to the string. Try
for k=1:21
str = sprintf('score%d',k);
end
str will be one of score1, score2, etc. This code will create the variable name and then you will have to evaluate it using (most likely) eval.
But ask yourself is this really necessary? Can't you put all of these scores into a matrix or cell array and so avoid these individual variables? While MATLAB allows you to do the above and evaluate strings etc. it is not usually a good habit to get in to.
2 Kommentare
Geoff Hayes
am 25 Feb. 2015
Ziv - since the vectors are of different lengths, you can use a cell array to store each one.
Weitere Antworten (1)
Jos (10584)
am 25 Feb. 2015
You should store your data into structs or in cell arrays:
scoreStruct(1).values = [1 2 3]
scoreStruct(2).values = 10
scoreStruct(3).values = 10:20
scoreCell = {[1 2 3], 10, 10:20}
Learn about structs and cell arrays now an save yourself a lot a of trouble in the future!
Never ever use eval for this !! (Can I make this red?)
1 Kommentar
Stephen23
am 18 Jun. 2018
Sadly this advice was ignored:
Siehe auch
Kategorien
Mehr zu Scope Variables and Generate Names 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!