Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with self-study
Search options not deleted
user 66796
A routine exercise designed to test one's knowledge; often from a textbook, course, or test used for a class or self-study. This community's policy is to "provide helpful hints" for such questions rather than complete answers.
-1
votes
2
answers
579
views
Which K-mean algorithm I have to use for this problem?
Perform a k-means Clustering (non-iterative algorithm) using k=2 randomly initialised centroids (cluster prototypes), and the Euclidean distance.
At the moment I manage to understand you can use diff …
- 431
3
votes
1
answer
100
views
Stationarity of AR(1) process whose autoregressive parameter could change over time
Imagine an AR(1) has an autoregressive parameter which could change in time.
$y_t-\mu=\phi_t (y_{t-1}-\mu)+\varepsilon_t\,$, where $\phi_t$ is not always constant but still lies inside the usual bou …
- 431
1
vote
1
answer
201
views
No ARIMA, No GARCH, which model?
I am trying to fit a model for a data set.
The acf and pacf, after differentiating the data are:
The acf shows that the returns appeared to be random. According to them seems like the ARIMA model i …
- 431
29
votes
5
answers
46k
views
How to test if my distribution is multimodal?
When I plot a histogram of my data, it has two peaks:
Does that mean a potential multi-modal distribution? I ran the dip.test in R (library(diptest)), and the output is:
D = 0.0275, p-value = …
- 431