Re: [R] Question on Variabeles
David1234 wrote: Hi everyone, Im quite new to R an I have the following Question: I would like to define Variables which I can add and multiply etc. and that R can simplyfy the terms. The variables should stand for integers. For example I would like to have an entry in an array with variable z and if I addb+zthe field should now contain 2z+b. Or if the field contains 1and I addzthe field should contain 1+z. How can I solve this problem? I tried to set z=integer and then for example matrix[1,1]=i But this does only work if I assign a value for z first. I am very grateful for any help. Thank you very much! David R is not an algebra system but a system for numerical computations. You can write a function that represents (i.e. generates and returns) your matrix and uses its arguments to fill different elements of that matrix. Best wishes, Uwe __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Question on Variabeles
Hi everyone, Im quite new to R an I have the following Question: I would like to define Variables which I can add and multiply etc. and that R can simplyfy the terms. The variables should stand for integers. For example I would like to have an entry in an array with variable z and if I addb+zthe field should now contain 2z+b. Or if the field contains 1and I addzthe field should contain 1+z. How can I solve this problem? I tried to set z=integer and then for example matrix[1,1]=i But this does only work if I assign a value for z first. I am very grateful for any help. Thank you very much! David -- View this message in context: http://www.nabble.com/Question-on-Variabeles-tp22388117p22388117.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Question on Variabeles
I fear that you are looking for a symbolic algebra system, and R is not that sort of platform. If I am correct and you still want to access a symbolic algebra system from R, then you should look at YACAS and the interface to it, Ryacas. -- David Winsemius On Mar 7, 2009, at 9:52 AM, David1234 wrote: Hi everyone, Im quite new to R an I have the following Question: I would like to define Variables which I can add and multiply etc. and that R can simplyfy the terms. The variables should stand for integers. For example I would like to have an entry in an array with variable z and if I addb+zthe field should now contain 2z+b. Or if the field contains 1and I addzthe field should contain 1+z. How can I solve this problem? I tried to set z=integer and then for example matrix[1,1]=i But this does only work if I assign a value for z first. I am very grateful for any help. Thank you very much! David -- View this message in context: http://www.nabble.com/Question-on-Variabeles-tp22388117p22388117.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD Heritage Laboratories West Hartford, CT __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
