MAC installation
by Peter Davidoff
GRETL users,
I have three students on MACs who have not been able to install
GRETL. I passed on the thread from last October but it hasn't
helped. The problem seems to be no X11. Any thoughts?
With thanks,
Peter
18 years, 11 months
Enabling "Build gretl documentation"
by Angelo Secchi
Hi,
I'm not able to have "Build gretl documentation" enabled.
What do I need to have it when installing (i'm using the cvs source) Gretl?
Thanks
18 years, 11 months
matrices and user functions
by Allin Cottrell
Sven asked -- maybe a few weeks ago -- about the possibility of
allowing users to define matrices via the gretl GUI, in the
context of supplying matrix arguments to a packaged function.
This is now in CVS. When you call a function via the function
package GUI and a matrix is wanted, there's a "More..." button
beside the argument slot, and clicking that takes you a matrix
definition dialog. There you have 3 choices: select a list of
series (you get a matrix with a series per column); construct the
matrix numerically (in this case you start by choosing dimensions
and an initial fill value, then you get a spreadsheet-type
editor); or construct the matrix using a formula.
You can also define a matrix via the new menu item /Data/Define
matrix.
In addition, when matrices are defined (via the GUI or the command
line or via a script), they appear as icons in the Session View
window. There you can view, edit or delete them.
Allin.
18 years, 11 months
matrix updates
by Allin Cottrell
Jack and I have been busy plugging holes, resolving anomalies, and
documenting things, in relation to the handling of matrices in
gretl scripts.
If you haven't checked lately, can I suggest you take a look at
the latest English-language manuals and try things out?
http://ricardo.ecn.wfu.edu/pub/gretl/manual/en/
(For full compliance with what the manuals say, you'll need CVS
gretl or today's Windows snapshot).
Here are some of the most recent changes/additions:
* nullspace() function to construct the right null space of a
given matrix.
* svd() function to do the Singular Value Decomposition of a
matrix.
* seq() function to make a row vector containing a sequence of
integers
* mexp() function to compute matrix exponential
* matrix B = A^k: raises matrix A to the integer power k
(previously this tried to produce a Kronecker product, rather
oddly).
Allin.
18 years, 11 months
