How to concatenate the data in each iteration in the same variable?

1 次查看（过去 30 天）
M
M 2023-11-21
评论： Walter Roberson 2023-11-21
I am saving the output of the 1st iteration in the images_TRO_pressing , images_TRO_slip, images_TRO_noise, the size of each variabe is 120*120*300
In the other iterations how can I keep adding the data in the same varibales so I end up with size for each of them around 120*120*3600? as well same to the varibale labels_TRO with size 1*900 for one iteration
Note that the third dimension which is the number of matrices varies in each iteration not all iterations give 300.
for i = 1:12
pressing_labels = find(labels_all_Train1(i).labels == 0);
slip_labels = find(labels_all_Train1(i).labels == 1);
noise_labels = find(labels_all_Train1(i).labels == 3);
minimum = min([length(pressing_labels), length(slip_labels), length(noise_labels)]);
random_pressing = randsample(pressing_labels, minimum);
random_slip = randsample(slip_labels, minimum);
random_noise = randsample(noise_labels, minimum);
images_TRO_pressing = HM_all_Train1(i).TRO_heatmap(:, :, random_pressing);
images_TRO_slip = HM_all_Train1(i).TRO_heatmap(:, :, random_slip);
images_TRO_noise = HM_all_Train1(i).TRO_heatmap(:, :, random_noise);
labels_TRO = [labels_all_Train1(i).labels(random_pressing), labels_all_Train1(i).labels(random_slip), labels_all_Train1(i).labels(random_noise)];
end
  16 个评论
显示 14更早的评论
M
M 2023-11-21
编辑：M 2023-11-21
@Walter Roberson Thanks a lot, this is worked and thanks for @Dyuman Joshi
but I am wondering why the logical indexing instead of "find" didnt work, any suggestion please?
Walter Roberson
Walter Roberson 2023-11-21
You have not been clear as to what your code is, or what your desired outcomes are.
If you are trying to find N locations each of which correspond to a particular arr value, then you have a few possibilities:
  • do NOT just take arr(LOGICAL MASK) since you already know what the arr values are at those locations because that is how you chose the locations
  • taking a random sub-sampling of a logical mask would get you are random number of elements selected, and would not tell you where they were selected from
  • using find() to locate the elements and taking a random selection from those indices works fine if what you want to know is the locations
  • You could create a vector 1:numel(arr) and index that vector at a logical matrix such as arr==0 ... but you would effectively just have duplicated the work of find() less efficiently

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by