How to add variables in workspace with names derived from a char array and corresponding values stored in a double array
5 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
harshpurohit11
el 17 de Ag. de 2018
char array col_names = [time; speed; distance...] and double array data = [0;1;2;3... ,10;20;30;40.. ,5;6;7;8...]. col_names is a mXn matrix and data is a kXm matrix. I need to generate workspace variables time, speed, distance.. with their value content coming from data matrix
3 comentarios
harshpurohit11
el 17 de Ag. de 2018
Editada: harshpurohit11
el 17 de Ag. de 2018
James Tursa
el 17 de Ag. de 2018
Editada: James Tursa
el 17 de Ag. de 2018
The syntax should have been:
for i = 1:size(col_names,1)
eval([col_names(i,1:end) ' = data(:,i)']);
BUT ... you are missing the entire point of Stephen's post. This is a very poor programming practice. Read Stephen's link to see why and to discover better methods of writing your code that are easier to read, maintain, etc.
Respuesta aceptada
Honglei Chen
el 17 de Ag. de 2018
Here is an example
col_names = ['time ';'speed'];
data = [0 1;2 3;4 5];
for m = 1:2
eval(sprintf('%s = data(:,m)',col_names(m,:)));
end
HTH
3 comentarios
Honglei Chen
el 17 de Ag. de 2018
I have no issue running this code. Can you clear your workspace and try again? This is just an example showing how this can be done.
Más respuestas (1)
Steven Lord
el 17 de Ag. de 2018
Instead of dynamically creating variables, I recommend creating a table array. The variables (columns) in a table are named so you can reference the data using those names.
>> R = randi([-10 10], 15, 3);
>> T = array2table(R, 'VariableNames', {'time', 'speed', 'distance'});
>> T.distance ./ T.time
0 comentarios
Ver también
Categorías
Más información sobre Data Type Identification en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!