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From |
richard boylan <richardtb25@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: list x matrix |

Date |
Sat, 27 Mar 2010 15:56:31 -0500 |

I had thought of doing that, but was wondering if there was a more direct way of doing that. So, I guess that answer the question, one cannot do this without converting the data into matrix and then back into variable. On Sat, Mar 27, 2010 at 3:35 PM, Scott Merryman <scott.merryman@gmail.com> wrote: > You could use -mkmat- to convert the x variables to matrix, perform > the multiplication and then use -svmat- to create the variables from > matrix. > > For example: > > > . sysuse auto,clear > (1978 Automobile Data) > > . matrix b = 10, 2, -3 > . mkmat mpg price, mat(X) > . count > 74 > . mat X = J(r(N),1,1), X > . matrix z = X*b' > . svmat z > > > Scott > > On Sat, Mar 27, 2010 at 2:49 PM, richard boylan <richardtb25@gmail.com> wrote: >> Very simple question, but I couldn't find the answer in the STATA documentation. >> >> I have a list >> local var "x1 x2 x3 ...." >> >> and a 1 x n matrix (vector) >> >> b = (b1 b2 b3 ..) >> >> How do I compute the new variable >> >> z = b1*x1 + b2*x2 + b3*x3 + ... >> >> I mean I know how to do that by writing the sum, there just has to be >> a better way of doing this. >> >> Also, what it is the best place to figure out this stuff? >> >> Thanks. >> >> Richard >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/statalist/faq >> * http://www.ats.ucla.edu/stat/stata/ >> > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: list x matrix***From:*Scott Merryman <scott.merryman@gmail.com>

**References**:**st: list x matrix***From:*richard boylan <richardtb25@gmail.com>

**Re: st: list x matrix***From:*Scott Merryman <scott.merryman@gmail.com>

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