Recent questions tagged machine-learning

$\text{Assuming 4-fold cross-validation and data D of size 100, what is the size of D.train ?}$ 

$\text { How many times we need to train the model for } \lambda=0.1 \text { ? }$

Given a dataset $\mathrm{D}=\left\{\left(x_i, y_i\right)\right\}, x_i \in R^k, y_i \in=\{-1,+1\}, 1 \leq i \leq N$.Which of the following is the Hinge Loss of the example...

Suppose we have a soft-margin SVM for which $\mathbf{w}=(-6,3)$ and $b=5$. Consider the example $(\mathbf{x}=(2,1), y=-1)$.$\text { $(I)$ How does the SVM classify } \mat...

What is the value of $\alpha_n$ for the circled data point ? $\alpha_n=0$$\alpha_n=C$$0<\alpha_n<C$Can be anything i.e. $0 \leq \alpha_n \leq C$

What is the value of $\alpha_n$ for the circled data point?$\alpha_n=0$$\alpha_n=C$$0<\alpha_n<C$$\alpha_n>C$

What is the value of $\alpha_n$ for the circled data point which is misclassified ? $\alpha_n=0$$\alpha_n=C$$0<\alpha_n<C$$\alpha_n>C$

With a non-linearly-separable dataset that contains some extra "noise" data points, using an SVM with slack variables to create a soft margin classifier, and a small valu...

$\text { Consider applying a soft margin SVM to the 1-dimensional data shown below. }$ $(I)\quad C=0: \text { All points will be support vectors. }$$(II)\quad C=\infty: X...

Recall that when the data are not linearly separable, SVM minimizes $||w||^2 + C \sum_i \xi_i$ subject to the constraint that $\forall_i, y_i w \cdot x_i \geq 1 - \xi_i$ ...

Suppose a soft SVM objective (with a bias parameter) is optimized on a dataset twice: once using a slack hyperparameter (the constant multiplier on the sum of slack varia...

Consider the soft SVM objective below:$$Minimise: \\\ frac{1}{2} ||w||_2^2 + C \sum_{i = 1}^N \xi_i$$ $$Subject \\\ to: \\\ y_i (w \cdot x_i + w_0) \geq 1 - \xi_i ; \\\ \...

if we run Hard margin SVM multipte times then it can give different $w$ and $b$ although boundary will be same .(Please enter 1 for True and. 0 for False).

In the context of Slack Soft Margin SVM (Support Vector Machine), which of the following expressions can describe the slack variable $\xi^{(i)}$? $ \xi^{(i)} = \begin{ca...

Suppose we have a soft-margin SVM for which $\mathbf{w}=(-6,3)$ and $b=5$. Consider the example $(\mathbf{x}=(2,1), y=-1)$.$(I)$ $\text { How does the SVM classify } \mat...

At the optimal solution of$$\begin{array}{cl}\min _{b, \mathbf{w}, \boldsymbol{\xi}} & \frac{1}{2}{\mathbf{w}^T} \mathbf{w}+C \cdot \sum_{n=1}^N \xi_n \\\text { s.t. } & ...