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From: Jaime E. Villate <villate@us...>  20130730 23:54:08

This is an automated email from the git hooks/postreceive script. It was generated because a ref change was pushed to the repository containing the project "Maxima CAS". The branch, master has been updated via c874ddaffd08d0d5a64e3082e3db3d9da6bc3edf (commit) from 9c8785863c0075e9a1cc91cc44cadc53ec3b7e2a (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below.  Log  commit c874ddaffd08d0d5a64e3082e3db3d9da6bc3edf Author: Jaime Villate <villate@...> Date: Wed Jul 31 00:53:33 2013 +0100 Documentation for plotdf updated. diff git a/doc/info/Numerical.texi b/doc/info/Numerical.texi index 8df67ef..774f61a 100644  a/doc/info/Numerical.texi +++ b/doc/info/Numerical.texi @@ 198,7 +198,7 @@ When the data @var{x} are real, real coefficients @code{a} and @code{b} can be computed such that @example x[j] = sum(a[k]*cos(2*%pi*j*k/n)+b[k]*sin(2*%pi*j*k/n), k, 0, n/2) +x[j] = sum(a[k]*cos(2*%pi*j*k/n)+b[k]*sin(2*%pi*j*k/n), k, 0, n/2) @end example with @@ 301,7 +301,7 @@ Computation of sine and cosine coefficients. @c b[n/2] : 0 $ @c listarray (a); @c listarray (b); @... f(j) := sum (a[k] * cos ( 2*%pi*j*k / n) + b[k] * sin ( 2*%pi*j*k / n), k, 0, n/2) $ +@c f(j) := sum (a[k] * cos (2*%pi*j*k / n) + b[k] * sin (2*%pi*j*k / n), k, 0, n/2) $ @c makelist (float (f (j)), j, 0, n  1); @c ===end=== @example @@ 326,7 +326,7 @@ Computation of sine and cosine coefficients. (%o15) [4.5,  1.0,  1.0,  1.0,  0.5] (%i16) listarray (b); (%o16) [0,  2.414,  1.0,  .4142, 0] (%i17) f(j) := sum (a[k]*cos(2*%pi*j*k/n) + b[k]*sin(2*%pi*j*k/n), +(%i17) f(j) := sum (a[k]*cos(2*%pi*j*k/n) + b[k]*sin(2*%pi*j*k/n), k, 0, n/2) $ (%i18) makelist (float (f (j)), j, 0, n  1); (%o18) [1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0] @@ 636,41 +636,43 @@ the menu. Integral curves can be obtained by clicking on the plot, or with the option @code{trajectory_at}. The direction of the integration can be controlled with the @code{direction} option, which can have values of @emph{forward}, @emph{backward} or @emph{both}. The number of integration steps is given by @code{nsteps} and the time interval between them is set up with the @code{tstep} option. The Adams Moulton method is used for the integration; it is also possible to switch to an adaptive RungeKutta 4th order method. +integration steps is given by @code{nsteps}; at each integration +step the time increment will be adjusted automatically to produce +displacements much smaller than the size of the plot window. The +numerical method used is 4th order RungeKutta with variable time steps. @b{Plot window menu:} The menu in the plot window has the following options: @emph{Zoom}, will change the behavior of the mouse so that it will allow you to zoom in on a region of the plot by clicking with the left button. Each click near a point magnifies the plot, keeping the center at the point where you clicked. Holding the @key{Shift} key while clicking, zooms out to the previous magnification. To resume computing trajectories when you click on a point, select @emph{Integrate} from the menu.  The option @emph{Config} in the menu can be used to change the ODE(s) in use and various other settings. After configuration changes are made, the menu option @emph{Replot} should be selected, to activate the new settings. If a pair of coordinates are entered in the field @...{Trajectory at} in the @emph{Config} dialog menu, and the +The menu bar of the plot window has the following seven icons: + +An X. Can be used to close the plot window. + +A wrench and a screwdriver. Opens the configuration menu with several +fields that show the ODE(s) in use and various other settings. If a pair +of coordinates are entered in the field @emph{Trajectory at} and the @key{enter} key is pressed, a new integral curve will be shown, in addition to the ones already shown. When @emph{Replot} is selected, only the last integral curve entered will be shown. +addition to the ones already shown. + +Two arrows following a circle. Replots the direction field with the +new settings defined in the configuration menu and replots only the last +integral curve that was previously plotted. + +Hard disk drive with an arrow. Used to save a copy of the +plot, in Postscript format, in the file specified in a field of the +box that appears when that icon is clicked. Holding the right mouse button down while the cursor is moved, can be used to drag the plot sideways or up and down. Additional parameters such as the number of steps, the initial value of @var{t} and the x and y centers and radii, may be set in the Config menu. +Magnifying glass with a plus sign. Zooms in the plot. A copy of the plot can be saved as a postscript file, using the menu option @emph{Save}. +Magnifying glass with a minus sign. Zooms out the plot. The plot can be +displaced by holding down the right mouse button while the mouse is +moved. + +Icon of a plot. Opens another window with a plot of the two variables +in terms of time, for the last integral curve that was plotted. @b{Plot options:} The @code{plotdf} command may include several options, each one being +Options can also be given within the @code{plotdf} itself, each one being a list of two or more elements. The first element in each option is the name of the option, and the remainder is the value or values assigned to the option. @@ 679,17 +681,9 @@ The options which are recognized by @code{plotdf} are the following: @itemize @bullet @item @...{tstep} defines the length of the increments on the independent variable @var{t}, used to compute an integral curve. If only one expression @var{dydx} is given to @code{plotdf}, the @var{x} variable will be directly proportional to @var{t}. The default value is 0.1.  @... @...{nsteps} defines the number of steps of length @code{tstep} that will be used for the independent variable, to compute an integral curve. The default value is 100. +@dfn{nsteps} defines the number of steps that will be used for the +independent variable, to compute an integral curve. The default value is +100. @item @dfn{direction} defines the direction of the independent  Summary of changes: doc/info/Numerical.texi  74 +++++++++++++++++++++ 1 files changed, 34 insertions(+), 40 deletions() hooks/postreceive  Maxima CAS 
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