I currently have an RDD with an array that stores a key-value pair where the key is the 2D indices of the array and the value is the number at that spot. For example [((0,0),1),((0,1),2),((1,0),3),((1,1),4)] I want to add up the values of each key with the surrounding values. In relation to my earlier example, I want to add up 1,2,3 and place it in the (0,0) key value spot. How would I do this?
Related Questions in MULTIDIMENSIONAL-ARRAY
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Is the transactionReceipt data present in dataWithContentsOfURL?
- UIWebView Screen Fitting Issue
- ZXingObjC encoding issues
- iOS: None of the valid provisioning profiles allowed the specific entitlements
- How to hide "Now playing url" in control center
- CloudKit: Preventing Duplicate Records
- Slow performance on ipad erasing image
- Swift code with multiple NSDateFormatter - optimization
Related Questions in KEY-VALUE
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Is the transactionReceipt data present in dataWithContentsOfURL?
- UIWebView Screen Fitting Issue
- ZXingObjC encoding issues
- iOS: None of the valid provisioning profiles allowed the specific entitlements
- How to hide "Now playing url" in control center
- CloudKit: Preventing Duplicate Records
- Slow performance on ipad erasing image
- Swift code with multiple NSDateFormatter - optimization
Related Questions in PYSPARK
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Is the transactionReceipt data present in dataWithContentsOfURL?
- UIWebView Screen Fitting Issue
- ZXingObjC encoding issues
- iOS: None of the valid provisioning profiles allowed the specific entitlements
- How to hide "Now playing url" in control center
- CloudKit: Preventing Duplicate Records
- Slow performance on ipad erasing image
- Swift code with multiple NSDateFormatter - optimization
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Popular Tags
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
I would suggest you do the following:
Define a function that, given a pair (i,j), returns a list with the pairs corresponding to the positions surrounding (i,j), plus the input pair (i,j). For instance, lets say the function is called
surrounding_pairs(pair)
. Then:Of course, you need to be careful and return only valid positions.
Use a
flatMap
on your RDD as follows:This will map your RDD from
[((0,0),1),((0,1),2),((1,0),3),((1,1),4)]
toThis way, the value at each position will be "copied" to the neighbour positions.
Finally, just use a
reduceByKey
to add the corresponding values at each position:I hope this makes sense.