Choose randomly rows in a matrix
1 visualización (últimos 30 días)
Mostrar comentarios más antiguos
Hi I have a matrix with 2 columns, the first is for 'ID', the second is for 'age'. I want to randomly pick 'n'(e.g. 2) IDs of the matrix and return the IDs and the age of the same row.
Thanks
0 comentarios
Respuestas (1)
Sean de Wolski
el 12 de Jun. de 2013
doc randperm
Then use the output of this as an index into your matrix.
x = magic(10);
idx = randperm(10,2)
x(idx,:)
3 comentarios
Walter Roberson
el 13 de Jun. de 2013
You are using an old version of MATLAB that does not support that syntax for randperm. Instead use
idx = randperm(size(x,1));
x(idx(1:2),:)
Ver también
Categorías
Más información sobre Creating and Concatenating Matrices 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!