According to the 'checkLayer' document, there is a description about 'validInputSize' and I am confused about the below description.
"For layers with a single input, specify validInputSize as a vector of integers corresponding to the dimensions of the input data."
what does 'single input' means? Does it means a really signle scalor? like x1? or vector like where ?
According to the 'checkLayer' document, 5 types of layer input are introduced for intermediate layer.
what I want is to make a intermediate layer having 2 input nodes. So, my input is .
In this case, I guess I need to use 'Vector sequences' and input size should be 2 by N by 1, where N is the number of observations.
(two features and each feature is just scalar)
(By the way, does 'observation' means batch size? I'm confused about therminology in Matlab)
Let's say N = 50. Then, input size is 2 by 50 by 1. So, when I validate my layer I need to set
validInputsize = [2 50 1];
If I write code like this, is this a 'single input'?
If it is a 'single input', what is 'multiple inputs'?
'multiple inputs' are used when my custom layer accept two different type of input?
The above figure showing 'two inputs' (if I am correct), one input is 2 by 1 vector like my case I explained in the above, the other input is 2 by 2 amplitude image (black & white). Am I correct?
Lastly, 'fullyConnectedLayer' has 'InputSize' and 'OutputSize' properties. Are they having different definition to input size in a custom layer? What value I choose in 'fullyConnectedLayer' it seems to me just 'one input' and 'one input' according to the definition in a custom layer.