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What is data in regression plot in neural network?

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Amod Amatya
Amod Amatya 2016-10-4
评论： Greg Heath 2018-5-19
I have trained a neural network to recognize three different signs (stop sign, no-left sign and no-entry sign). I have taken 50 images for each class. Every picture has size of 25x25 matrix,so my input is 625x150 matrix and target - 1x150 matrix. After training for 1000 epochs, the network shows the following regression plot. But I do not understand what actually does the circle shaped data mean? And is it supposed to be concentrated as shown in the diagram?

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回答（2 个）

ALBERT ALEXANDER STONIER
The circled shaped in the input data which you have used for the training of neural network.
Greg Heath
Greg Heath 2016-10-5
The circles are your OUTPUT data. HOWEVR, You have 3 classes of target the plots only show outputs of 0 and 1.
Where are the points for the third class?
The standard approach is to have 3 dimensional (0,1) unit vectors for targets. That is, columns of eye(3).
Hope this helps.
Greg
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Greg Heath
Greg Heath 2018-5-19
I'm not offended that you forgot to include the word "please". So don't worry about it anymore.
The R and Rsquare (aka R^2)statistics are basic quantities used in statistical analysis curve-fitting. They are explained in all elementary statistics books as well as Google.
With regard to characterizing a nonlinear curve-fitting model, R is the slope in the linear fit
output = R*target + bias
Hope this helps
Greg

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