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, 3 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, 3 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, 3 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, 3 months
