Tensorflow Playground - Explanation of the Feature colored with blue and orange Tensorflow playground input feature $X_1$ is colored orange and blue. What is the meaning of these colors?
I think $(X_1, X_2)$ is training data point representing the coordinates of the dot to classify positive/blue or negative/orange in the OUTPUT on the right.
Then how come a scalar value $X_1$ has orange part and blue part? $X_1$ is not a filter in a CNN, then how come it is half separated blue and half orange with vertical edge in the middle?
Please help understand.


if you hover over the features, you can see what they refers to on the image on the right.
Hovering over $X_1$:

Hovering over $\sin(X_2)$:

in other words, are represented as binary variables that corresponds on which section the points are located, for example(orange = 0, blue = 1), but might easily be just a visual representation for "positive" (blue) and negative (orange) values, and so the points you can see them as centered in $(0,0)$
