Info

此问题已关闭。 请重新打开它进行编辑或回答。

How to set unlabeled values in matrix to zero

1 次查看（过去 30 天）
Mel
Mel 2020-8-26
关闭： MATLAB Answer Bot 2021-8-20
Hello everyone!
I have a 1536 x 2048 matrix. For visualization purposes I preprocessed 1Mio random data points and labeled them. Now I want to plot the previous matrix, but set the values of the other 2 Mio data points to zero in order to make the processed ones visible. Is this even possible? I'd be super grateful if you guys could help.
Thank you in advance
  2 个评论
Rik
Rik 2020-8-26
Is this possible? Probably. If you want help you will either have to provide instructions on how to hack your computer or explain what you did.
Have a read here and here. It will greatly improve your chances of getting an answer.
Rafael Hernandez-Walls
Rafael Hernandez-Walls 2020-8-26
spy(S)
plots the sparsity pattern of matrix S. Nonzero values are colored while zero values are white

此问题已关闭。

回答（1 个）

Rishabh Mishra
Rishabh Mishra 2020-9-3
Assuming the name of the matrix variable as 'mat'
To set unlabeled matrix values to 0, consider the pseudocode below:
for i = 1:1536
for j = 1:2048
If mat(i)(j) is unlabeled
Set mat(i)(j) to 0
end
end
To visualize sparsity pattern of the matrix, use the code below.
>> spy(mat)
For more information on ‘spy()’ function, refer this link.

此问题已关闭。

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by