matlab中这句trainData = [nor(1:30000,:);fal(1:30000,:)]；看不懂数据的组成 求大神给解释下。

Question

%训练数据，测试数据
trainData = [nor(1:30000,:);fal(1:30000,:)];
trainLabels = [norLabels(1:30000,:);falLabels(1:30000,:)];
testData = [nor(30001:35000,:);fal(30001:35000,:)];
testLabels = [norLabels(30001:35000,:);falLabels(30001:35000,:)];

Answer 1

matlab中这句trainData = [nor(1:30000,:);fal(1:30000,:)]的意思，读取变量nor和fal中的1至30000行里的所有数据。
nor(1:30000,:)——是指变量nor，1至30000行里的所有数据
fal(1:30000,:)——是指变量fal，1至30000行里的所有数据