how to create a matrix named after a string and be able to use it afterwards
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Hello, first thanks to any help you can give me.
I would like to build a m*n matrix of zeros with its var named by a string and be able to call it after to populate the zeros with numbers.
I have managed to do it using eval, like in this example:
>> eval(['my_var_name' '=zeros(4,4)'])
my_var_name =
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
>> eval(['my_var_name(2,:)' '=[1,2,3,4]'])
my_var_name =
0 0 0 0
1 2 3 4
0 0 0 0
0 0 0 0
but is there a better or simpler way to do it? I will have to do this several times in a loop to a certain number of matrices that i will name by strings, the calculations i have to do in order to populated these matrices are computational expensive will eval function make any significant overburden?
thanks for any suggestions.
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 19 Jun. 2011
1 Kommentar
Jan
am 19 Jun. 2011
+1. And to repeat it here directly: It is recommended to avoid this technique. Use dynamic fieldnames instead:
data.('my_var_name') = zeros(4); data.('my_var_name')(2, :) = 1:4;
This will reduce the time needed for programming, debugging and running your program substantially.
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Characters and Strings 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!