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From: arijit chakraborty <akc14@hotmail.com>
To: "dev@systemml.incubator.apache.org" <dev@systemml.incubator.apache.org>
Subject: Re: SystemML query
Thread-Topic: SystemML query
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Date: Mon, 17 Apr 2017 15:40:51 +0000
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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 =3D matrix("1 2 3 3 3 4 5 6", rows =3D 8, cols =3D 1)

dup_ind =3D matrix(1,rows =3D nrow(duplicate_matrix),cols =3D 1)
a =3D nrow(dup_ind)
b =3D nrow(duplicate_matrix)
                                                #Clumsy Unique. Can we chec=
k with the systemml guy?
for(i in 2:nrow(duplicate_matrix)){
    if(as.scalar(duplicate_matrix[i,]) =3D=3D as.scalar(duplicate_matrix[i-=
1,]) ){
    dup_ind[i,] =3D 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 <npansar@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 o=
ther committers and urge them to be active on stackoverflow too. If you hav=
e 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 <akc14@hotmail.com<mailto:a=
kc14@hotmail.com>> wrote:

Thanks a lot Niketan! I didn=92t expect you to reply my question. Actually =
I was not sure if I can post question in that forum. And hardly people repl=
y on systemML in stackoverflow.

But from now on I=92ll surely post my questions there. I=92ve few more ques=
tions.

Thanks a lot again!

Regards,
Arijit

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=3D550986> for Window=
s 10

From: Niketan Pansare<mailto:npansar@us.ibm.com>
Sent: Thursday, April 13, 2017 11:01 PM
To: arijit chakraborty<mailto:akc14@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@sy=
stemml.incubator.apache.org> as your question may help others as well :)

X =3D matrix(1, rows =3D 1, cols =3D 100)
J =3D matrix("10 20 25 26 28 31 50 67 79", rows=3D1, cols=3D9)
J =3D t(J) # Make J a column vector
I =3D matrix(1, rows=3Dnrow(J), cols=3D1)
V =3D matrix(10, rows=3Dnrow(J), cols=3D1)
output =3D 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=3Dus-npansar

<graycol.gif>arijit chakraborty ---04/13/2017 09:20:38 AM---Hi Niketan, Hop=
e you are keeping well!

From: arijit chakraborty <akc14@hotmail.com<mailto:akc14@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 =3D 1, cols =3D 100)=
. I've another column matrix of form matrix("10 20 25 26 28 31 50 67 79", r=
ows =3D 1, cols =3D 9). I want to add some value say 10, to 100 column matr=
ix using the values of second matrix position indicator. Rest of the column=
s' values remain the same

How to do it here?

Thanks a lot! Regards,
Arijit


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