Thanks a lot Matthias! This was really helpful.
Regards,
Arijit
________________________________
From: Matthias Boehm <mboe...@googlemail.com>
Sent: Monday, April 17, 2017 11:08:52 PM
To: dev@systemml.incubator.apache.org
Subject: Re: SystemML query
if your data X is already ordered you can do the following:
I = rbind(matrix(1,1,1), (X[1:nrow(X)-1,]!=X[2:nrow(X),]));
dX = removeEmpty(target=X, margin="rows", select=I);
Regards,
Matthias
On 4/17/2017 8:40 AM, arijit chakraborty wrote:
>
> Hi,
>
> I've an issue regarding finding and removing the duplicate in a column/ row
> of a matrix. I'm tried this method:
>
> duplicate_matrix = matrix("1 2 3 3 3 4 5 6", rows = 8, cols = 1)
>
> dup_ind = matrix(1,rows = nrow(duplicate_matrix),cols = 1)
> a = nrow(dup_ind)
> b = nrow(duplicate_matrix)
> #Clumsy Unique. Can we check
> with the systemml guy?
> for(i in 2:nrow(duplicate_matrix)){
> if(as.scalar(duplicate_matrix[i,]) == as.scalar(duplicate_matrix[i-1,]) ){
> dup_ind[i,] = 0
> }
> }
>
>
> My question is, is there any better way of doing it? In systemML, we don't
> have method to find/remove/ count duplicate values.
>
> Thank you!
> Arijit
>
>
> ________________________________
> From: Niketan Pansare <npan...@us.ibm.com>
> Sent: Friday, April 14, 2017 9:14 PM
> To: arijit chakraborty
> Cc: Matthias Boehm1; Berthold Reinwald
> Subject: Re: SystemML query
>
> Thanks Arijit. I appreciate your feedback. I will convey your concerns to
> other committers and urge them to be active on stackoverflow too. If you have
> already posted questions on stackoverflow, please send me the links and I
> will do my best to answer them :)
>
> On Apr 14, 2017, at 6:50 AM, arijit chakraborty
> <ak...@hotmail.com<mailto:ak...@hotmail.com>> wrote:
>
> Thanks a lot Niketan! I didn’t expect you to reply my question. Actually I
> was not sure if I can post question in that forum. And hardly people reply on
> systemML in stackoverflow.
>
> But from now on I’ll surely post my questions there. I’ve few more questions.
>
> Thanks a lot again!
>
> Regards,
> Arijit
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
>
> From: Niketan Pansare<mailto:npan...@us.ibm.com>
> Sent: Thursday, April 13, 2017 11:01 PM
> To: arijit chakraborty<mailto:ak...@hotmail.com>
> Subject: Re: SystemML query
>
>
> Hi Arijit,
>
> I am happy to help, however I would recommend to post question (along with
> answer) on our mailing list
> dev@systemml.incubator.apache.org<mailto:dev@systemml.incubator.apache.org>
> as your question may help others as well :)
>
> X = matrix(1, rows = 1, cols = 100)
> J = matrix("10 20 25 26 28 31 50 67 79", rows=1, cols=9)
> J = t(J) # Make J a column vector
> I = matrix(1, rows=nrow(J), cols=1)
> V = matrix(10, rows=nrow(J), cols=1)
> output = table(I, J, V)
>
> Thanks,
>
> Niketan Pansare
> IBM Almaden Research Center
> E-mail: npansar At us.ibm.com<http://us.ibm.com>
> http://researcher.watson.ibm.com/researcher/view.php?person=us-npansar
>
> <graycol.gif>arijit chakraborty ---04/13/2017 09:20:38 AM---Hi Niketan, Hope
> you are keeping well!
>
> From: arijit chakraborty <ak...@hotmail.com<mailto:ak...@hotmail.com>>
> To: Niketan Pansare/Almaden/IBM@IBMUS
> Date: 04/13/2017 09:20 AM
> Subject: SystemML query
> <EC07C6C8E03748A1B86D1B5DBC6B46FD.png>
>
>
>
> Hi Niketan,
>
> Hope you are keeping well!
>
> I got stuck in a systemML coding problem and don't know where to approach. So
> mailing you. I know this is not fair, and will not repeat in future.
>
> My question is the following:
>
> I've a matrix of 1 row and 100 columns, matrix(1, rows = 1, cols = 100). I've
> another column matrix of form matrix("10 20 25 26 28 31 50 67 79", rows = 1,
> cols = 9). I want to add some value say 10, to 100 column matrix using the
> values of second matrix position indicator. Rest of the columns' values
> remain the same
>
> How to do it here?
>
> Thanks a lot! Regards,
> Arijit
>
>
>
>
>
