Ask Ghassem - Recent questions tagged softmax-regression

How to calculate Softmax Regression probabilities in this example?

Thu, 04 Apr 2019 18:20:53 +0000

1) What will be the probability of an iris with petal length = 4.6 and petal width = 1.7 to be classified as Virginica?

2) What will be the probability of Virginica, if we use all features petal length = 4.6 and petal width = 1.7, sepal length = 5.5 and sepal width = 3.0 with the same weight initialization?

How to calculate Softmax Regression probabilities?

Thu, 21 Mar 2019 16:11:09 +0000

The scatter plot of Iris Dataset is shown in the figure below. Assume Softmax Regression is used to classify Iris to Setosa, Versicolor, or Viriginica using just petal length and petal width. If all the weights required for Softmax Regression initialized to 0.5 and the network includes bias nodes:

1) Write the weight vectors and equations for calculating the class probabilities.

2) We have a new iris and we have measured petal length = 4.5 and petal width = 1.6. Using the above initial model, what would be the result of classification?

3) If we change all the weights related to the class blue to 1 and keep all other weights 0.5, what will be the predicted class?