RE: [math] Scaling arrays
> Patches just applied. Many thanks. One small thing that will make it easier > in the future is to create patches from the top-level /trunk directory. > Thanks! >Phil OK, will do. Email Disclaimer: www.stjude.org/emaildisclaimer Consultation Disclaimer: www.stjude.org/consultationdisclaimer - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
Re: [math] Scaling arrays
On 3/15/13 1:21 PM, Becksfort, Jared wrote: > > -Original Message- > From: Becksfort, Jared > Sent: Monday, March 11, 2013 12:28 PM > To: Commons Developers List > Subject: RE: [math] Scaling arrays. . > > On 3/11/13 8:21 AM, Becksfort, Jared wrote: >> Hi Phil, >> >>> What exactly *is* it and what are the use cases? >> Just a method to multiply each element in an array by a number and return >> either a copy of the array or do it in place. Maybe there can be one method >> for either way: >> >> public static double[] scale(double val, final double[] arr) { >> double[] newArr = new double[arr.length]; >> for (int i = 0; i < arr.length; i++) { >> newArr[i] = arr[i] * val; >> } >> return newArr; >> } >> >> public static void scaleInPlace(double val, final double[] arr) { >> for (int i = 0; i < arr.length; i++) { >> arr[i] *= val; >> } >> } >> >>> ...use cases >> I imagine they are pretty varied. These methods could be used any time you >> want to multiply all elements in an array by a number without writing a loop >> each time. I am using this in some optimization code that I am submitting >> but figured it would be broadly applicable enough to just be put in the >> MathArrays class. >> >> Jared >> >> -Original Message- >> From: Phil Steitz [mailto:phil.ste...@gmail.com] >> Sent: Sunday, March 10, 2013 2:19 PM >> To: Commons Developers List >> Subject: Re: [math] Scaling arrays. . >> >> On 3/8/13 12:14 PM, Becksfort, Jared wrote: >>> Hello, >>> >>> I may be missing it somewhere, but I am surprised there is no function for >>> scaling arrays in MathArrays.java or somewhere else. >>> >>> - Am I stupidly missing it? >> Probably not. Closest thing is probably normalize in MathArrays. >>> - Is there a reason it is not in there? >> Probably no; though you will find that most vector / array algebraic >> operations are implemented on the objects in the linear package, rather than >> directly on double[]s. >>> - Shall I add it? >> +1 to add this >> Created an issue and submitted patches for MathArrays.java and >> MathArraysTest.java >> https://issues.apache.org/jira/browse/MATH-946 >> Jared >> Phil >> What exactly *is* it and what are the use cases? >> >> Phil >>> Thanks, >>> Jared > Hello, > > Does anyone know if these changes might be committed to the repository? Some > upcoming changes I am submitting for another issue rely on it. It is not too > much trouble for me to remove the dependencies, but if this is going in then > I may as well use it. > > https://issues.apache.org/jira/browse/MATH-946 Patches just applied. Many thanks. One small thing that will make it easier in the future is to create patches from the top-level /trunk directory. Thanks! Phil > > Thanks, > Jared > > > > Email Disclaimer: www.stjude.org/emaildisclaimer > Consultation Disclaimer: www.stjude.org/consultationdisclaimer > > > - > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
Re: [math] Scaling arrays
Le 15/03/2013 22:36, Luc Maisonobe a écrit : > Le 15/03/2013 21:21, Becksfort, Jared a écrit : >> >> >> -Original Message- From: Becksfort, Jared Sent: Monday, March >> 11, 2013 12:28 PM To: Commons Developers List Subject: RE: [math] >> Scaling arrays. . >> >> On 3/11/13 8:21 AM, Becksfort, Jared wrote: >>> Hi Phil, >>> >>>> What exactly *is* it and what are the use cases? >>> Just a method to multiply each element in an array by a number and >>> return either a copy of the array or do it in place. Maybe there >>> can be one method for either way: >>> >>> public static double[] scale(double val, final double[] arr) { >>> double[] newArr = new double[arr.length]; for (int i = 0; i < >>> arr.length; i++) { newArr[i] = arr[i] * val; } return newArr; } >>> >>> public static void scaleInPlace(double val, final double[] arr) { >>> for (int i = 0; i < arr.length; i++) { arr[i] *= val; } } >>> >>>> ...use cases >>> I imagine they are pretty varied. These methods could be used any >>> time you want to multiply all elements in an array by a number >>> without writing a loop each time. I am using this in some >>> optimization code that I am submitting but figured it would be >>> broadly applicable enough to just be put in the MathArrays class. >>> >>> Jared >>> >>> -Original Message- From: Phil Steitz >>> [mailto:phil.ste...@gmail.com] Sent: Sunday, March 10, 2013 2:19 >>> PM To: Commons Developers List Subject: Re: [math] Scaling arrays. >>> . >>> >>> On 3/8/13 12:14 PM, Becksfort, Jared wrote: >>>> Hello, >>>> >>>> I may be missing it somewhere, but I am surprised there is no >>>> function for scaling arrays in MathArrays.java or somewhere >>>> else. >>>> >>>> - Am I stupidly missing it? >>> Probably not. Closest thing is probably normalize in MathArrays. >>>> - Is there a reason it is not in there? >>> Probably no; though you will find that most vector / array >>> algebraic operations are implemented on the objects in the linear >>> package, rather than directly on double[]s. >>>> - Shall I add it? >> >>> +1 to add this >> >>> Created an issue and submitted patches for MathArrays.java and >>> MathArraysTest.java >> >>> https://issues.apache.org/jira/browse/MATH-946 >> >>> Jared >> >>> Phil What exactly *is* it and what are the use cases? >>> >>> Phil >>>> Thanks, Jared >> >> Hello, >> > > Hi Jared, > >> Does anyone know if these changes might be committed to the >> repository? Some upcoming changes I am submitting for another issue >> rely on it. It is not too much trouble for me to remove the >> dependencies, but if this is going in then I may as well use it. > > I will look at this tomorrow morning (European time) and will probably > commit it if nobody does it before. Well, it seems Phil did it just a few minutes ago ;-) Luc > > best regards, > Luc > >> >> https://issues.apache.org/jira/browse/MATH-946 >> >> Thanks, Jared >> >> >> >> Email Disclaimer: www.stjude.org/emaildisclaimer Consultation >> Disclaimer: www.stjude.org/consultationdisclaimer >> >> >> - >> >> > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >> For additional commands, e-mail: dev-h...@commons.apache.org >> >> > > > - > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
Re: [math] Scaling arrays
Le 15/03/2013 21:21, Becksfort, Jared a écrit : > > > -Original Message- From: Becksfort, Jared Sent: Monday, March > 11, 2013 12:28 PM To: Commons Developers List Subject: RE: [math] > Scaling arrays. . > > On 3/11/13 8:21 AM, Becksfort, Jared wrote: >> Hi Phil, >> >>> What exactly *is* it and what are the use cases? >> Just a method to multiply each element in an array by a number and >> return either a copy of the array or do it in place. Maybe there >> can be one method for either way: >> >> public static double[] scale(double val, final double[] arr) { >> double[] newArr = new double[arr.length]; for (int i = 0; i < >> arr.length; i++) { newArr[i] = arr[i] * val; } return newArr; } >> >> public static void scaleInPlace(double val, final double[] arr) { >> for (int i = 0; i < arr.length; i++) { arr[i] *= val; } } >> >>> ...use cases >> I imagine they are pretty varied. These methods could be used any >> time you want to multiply all elements in an array by a number >> without writing a loop each time. I am using this in some >> optimization code that I am submitting but figured it would be >> broadly applicable enough to just be put in the MathArrays class. >> >> Jared >> >> -Original Message- From: Phil Steitz >> [mailto:phil.ste...@gmail.com] Sent: Sunday, March 10, 2013 2:19 >> PM To: Commons Developers List Subject: Re: [math] Scaling arrays. >> . >> >> On 3/8/13 12:14 PM, Becksfort, Jared wrote: >>> Hello, >>> >>> I may be missing it somewhere, but I am surprised there is no >>> function for scaling arrays in MathArrays.java or somewhere >>> else. >>> >>> - Am I stupidly missing it? >> Probably not. Closest thing is probably normalize in MathArrays. >>> - Is there a reason it is not in there? >> Probably no; though you will find that most vector / array >> algebraic operations are implemented on the objects in the linear >> package, rather than directly on double[]s. >>> - Shall I add it? > >> +1 to add this > >> Created an issue and submitted patches for MathArrays.java and >> MathArraysTest.java > >> https://issues.apache.org/jira/browse/MATH-946 > >> Jared > >> Phil What exactly *is* it and what are the use cases? >> >> Phil >>> Thanks, Jared > > Hello, > Hi Jared, > Does anyone know if these changes might be committed to the > repository? Some upcoming changes I am submitting for another issue > rely on it. It is not too much trouble for me to remove the > dependencies, but if this is going in then I may as well use it. I will look at this tomorrow morning (European time) and will probably commit it if nobody does it before. best regards, Luc > > https://issues.apache.org/jira/browse/MATH-946 > > Thanks, Jared > > > > Email Disclaimer: www.stjude.org/emaildisclaimer Consultation > Disclaimer: www.stjude.org/consultationdisclaimer > > > - > > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
RE: [math] Scaling arrays
-Original Message- From: Becksfort, Jared Sent: Monday, March 11, 2013 12:28 PM To: Commons Developers List Subject: RE: [math] Scaling arrays. . On 3/11/13 8:21 AM, Becksfort, Jared wrote: > Hi Phil, > >> What exactly *is* it and what are the use cases? > Just a method to multiply each element in an array by a number and return > either a copy of the array or do it in place. Maybe there can be one method > for either way: > > public static double[] scale(double val, final double[] arr) { > double[] newArr = new double[arr.length]; > for (int i = 0; i < arr.length; i++) { > newArr[i] = arr[i] * val; > } > return newArr; > } > > public static void scaleInPlace(double val, final double[] arr) { > for (int i = 0; i < arr.length; i++) { > arr[i] *= val; > } > } > >> ...use cases > I imagine they are pretty varied. These methods could be used any time you > want to multiply all elements in an array by a number without writing a loop > each time. I am using this in some optimization code that I am submitting > but figured it would be broadly applicable enough to just be put in the > MathArrays class. > > Jared > > -Original Message- > From: Phil Steitz [mailto:phil.ste...@gmail.com] > Sent: Sunday, March 10, 2013 2:19 PM > To: Commons Developers List > Subject: Re: [math] Scaling arrays. . > > On 3/8/13 12:14 PM, Becksfort, Jared wrote: >> Hello, >> >> I may be missing it somewhere, but I am surprised there is no function for >> scaling arrays in MathArrays.java or somewhere else. >> >> - Am I stupidly missing it? > Probably not. Closest thing is probably normalize in MathArrays. >> - Is there a reason it is not in there? > Probably no; though you will find that most vector / array algebraic > operations are implemented on the objects in the linear package, rather than > directly on double[]s. >> - Shall I add it? >+1 to add this >Created an issue and submitted patches for MathArrays.java and >MathArraysTest.java >https://issues.apache.org/jira/browse/MATH-946 >Jared >Phil > What exactly *is* it and what are the use cases? > > Phil >> Thanks, >> Jared Hello, Does anyone know if these changes might be committed to the repository? Some upcoming changes I am submitting for another issue rely on it. It is not too much trouble for me to remove the dependencies, but if this is going in then I may as well use it. https://issues.apache.org/jira/browse/MATH-946 Thanks, Jared Email Disclaimer: www.stjude.org/emaildisclaimer Consultation Disclaimer: www.stjude.org/consultationdisclaimer - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
RE: [math] Scaling arrays
On 3/11/13 8:21 AM, Becksfort, Jared wrote: > Hi Phil, > >> What exactly *is* it and what are the use cases? > Just a method to multiply each element in an array by a number and return > either a copy of the array or do it in place. Maybe there can be one method > for either way: > > public static double[] scale(double val, final double[] arr) { > double[] newArr = new double[arr.length]; > for (int i = 0; i < arr.length; i++) { > newArr[i] = arr[i] * val; > } > return newArr; > } > > public static void scaleInPlace(double val, final double[] arr) { > for (int i = 0; i < arr.length; i++) { > arr[i] *= val; > } > } > >> ...use cases > I imagine they are pretty varied. These methods could be used any time you > want to multiply all elements in an array by a number without writing a loop > each time. I am using this in some optimization code that I am submitting > but figured it would be broadly applicable enough to just be put in the > MathArrays class. > > Jared > > -Original Message- > From: Phil Steitz [mailto:phil.ste...@gmail.com] > Sent: Sunday, March 10, 2013 2:19 PM > To: Commons Developers List > Subject: Re: [math] Scaling arrays. . > > On 3/8/13 12:14 PM, Becksfort, Jared wrote: >> Hello, >> >> I may be missing it somewhere, but I am surprised there is no function for >> scaling arrays in MathArrays.java or somewhere else. >> >> - Am I stupidly missing it? > Probably not. Closest thing is probably normalize in MathArrays. >> - Is there a reason it is not in there? > Probably no; though you will find that most vector / array algebraic > operations are implemented on the objects in the linear package, rather than > directly on double[]s. >> - Shall I add it? >+1 to add this Created an issue and submitted patches for MathArrays.java and MathArraysTest.java https://issues.apache.org/jira/browse/MATH-946 Jared >Phil > What exactly *is* it and what are the use cases? > > Phil >> Thanks, >> Jared Email Disclaimer: www.stjude.org/emaildisclaimer Consultation Disclaimer: www.stjude.org/consultationdisclaimer - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
Re: [math] Scaling arrays
On 3/11/13 8:21 AM, Becksfort, Jared wrote: > Hi Phil, > >> What exactly *is* it and what are the use cases? > Just a method to multiply each element in an array by a number and return > either a copy of the array or do it in place. Maybe there can be one method > for either way: > > public static double[] scale(double val, final double[] arr) { > double[] newArr = new double[arr.length]; > for (int i = 0; i < arr.length; i++) { > newArr[i] = arr[i] * val; > } > return newArr; > } > > public static void scaleInPlace(double val, final double[] arr) { > for (int i = 0; i < arr.length; i++) { > arr[i] *= val; > } > } > >> ...use cases > I imagine they are pretty varied. These methods could be used any time you > want to multiply all elements in an array by a number without writing a loop > each time. I am using this in some optimization code that I am submitting > but figured it would be broadly applicable enough to just be put in the > MathArrays class. > > Jared > > -Original Message- > From: Phil Steitz [mailto:phil.ste...@gmail.com] > Sent: Sunday, March 10, 2013 2:19 PM > To: Commons Developers List > Subject: Re: [math] Scaling arrays. . > > On 3/8/13 12:14 PM, Becksfort, Jared wrote: >> Hello, >> >> I may be missing it somewhere, but I am surprised there is no function for >> scaling arrays in MathArrays.java or somewhere else. >> >> - Am I stupidly missing it? > Probably not. Closest thing is probably normalize in MathArrays. >> - Is there a reason it is not in there? > Probably no; though you will find that most vector / array algebraic > operations are implemented on the objects in the linear package, rather than > directly on double[]s. >> - Shall I add it? +1 to add this Phil > What exactly *is* it and what are the use cases? > > Phil >> Thanks, >> Jared >> >> >> Email Disclaimer: www.stjude.org/emaildisclaimer Consultation >> Disclaimer: www.stjude.org/consultationdisclaimer >> > > - > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > > > > - > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
RE: [math] Scaling arrays
Hi Phil, > What exactly *is* it and what are the use cases? Just a method to multiply each element in an array by a number and return either a copy of the array or do it in place. Maybe there can be one method for either way: public static double[] scale(double val, final double[] arr) { double[] newArr = new double[arr.length]; for (int i = 0; i < arr.length; i++) { newArr[i] = arr[i] * val; } return newArr; } public static void scaleInPlace(double val, final double[] arr) { for (int i = 0; i < arr.length; i++) { arr[i] *= val; } } >...use cases I imagine they are pretty varied. These methods could be used any time you want to multiply all elements in an array by a number without writing a loop each time. I am using this in some optimization code that I am submitting but figured it would be broadly applicable enough to just be put in the MathArrays class. Jared -Original Message- From: Phil Steitz [mailto:phil.ste...@gmail.com] Sent: Sunday, March 10, 2013 2:19 PM To: Commons Developers List Subject: Re: [math] Scaling arrays. . On 3/8/13 12:14 PM, Becksfort, Jared wrote: > Hello, > > I may be missing it somewhere, but I am surprised there is no function for > scaling arrays in MathArrays.java or somewhere else. > > - Am I stupidly missing it? Probably not. Closest thing is probably normalize in MathArrays. > > - Is there a reason it is not in there? Probably no; though you will find that most vector / array algebraic operations are implemented on the objects in the linear package, rather than directly on double[]s. > > - Shall I add it? What exactly *is* it and what are the use cases? Phil > > Thanks, > Jared > > > Email Disclaimer: www.stjude.org/emaildisclaimer Consultation > Disclaimer: www.stjude.org/consultationdisclaimer > - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
Re: [math] Scaling arrays
On 3/8/13 12:14 PM, Becksfort, Jared wrote: > Hello, > > I may be missing it somewhere, but I am surprised there is no function for > scaling arrays in MathArrays.java or somewhere else. > > - Am I stupidly missing it? Probably not. Closest thing is probably normalize in MathArrays. > > - Is there a reason it is not in there? Probably no; though you will find that most vector / array algebraic operations are implemented on the objects in the linear package, rather than directly on double[]s. > > - Shall I add it? What exactly *is* it and what are the use cases? Phil > > Thanks, > Jared > > > Email Disclaimer: www.stjude.org/emaildisclaimer > Consultation Disclaimer: www.stjude.org/consultationdisclaimer > - To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org