Re: Mathematica frustrations...
- To: mathgroup@smc.vnet.net
- Subject: [mg11141] Re: Mathematica frustrations...
- From: jgore@andrew.cmu.edu
- Date: Mon, 23 Feb 1998 21:41:00 -0500
- Organization: Carnegie Mellon, Pittsburgh, PA
--On Thursday, February 19, 1998, 12:17 AM -0500
brett@spam-sucks.boxmail.com wrote:
> One "feature" I find extremely frustrating is the numbering and
> evaluation order of equations in notebooks. When I edit
> something early in a notebook, I would like Mathematica to re-
> evaluate the rest of the notebook, and always perform the
> notebook evaluation in a straight top-to-bottom order. Is there any
> way to set an option to get it to behave that way? For things
> like "%" references to previous results, having the definition of
> "previous" depend on what you edited last seems crazy. I guess I
> prefer the Mathcad way, in which evaluation is always in a well-defined
> order determined by page layout.
There is a menu item to evaluate an entire notebook (on the Windows
version at least) Kernel->Evaluate->Evaluate Notebook. In better
style, however, you should look at building functions and variables to
help with this. Therefore, you limit the dependencies across cells. You
can also put a number of sequential expressions in a single cell (end
the expressions with a semicolon) and then they will be evaluated in
order with the last expression's output appearing in the output cell
(if you want more that the last expression's output, you can use
Module:
Module[ {result1, result2, result3},
result1 = expr ;
result2 = expr ;
result3 = expr ;
{result1,result2,result3}
]
This will evaluate the three expressions and then return their results in a
list. Notice there is no semicolon after the last expression since you want
that result displayed.
>
> Another problem is that Mathematica seems to reset plot
> parameters at random, particularly after erroneous edits. I am using
> the MultipleListPlot and ListPlot functions to create graphs.
> After I get the graph sized how I like it (with the mouse), I will
> sometimes try changing a few parameters in the graph. If I make
> a typo and Mathematica can't understand the command, my graph will jump
> to some random different size once I get the error fixed.
Under Windows, when you are resizing a graph, the size is displayed in
the lower left corner. You can use this to input the size parameters in
your graph :
Plot[Sin[x],{x,1,2},ImageSize -> {300,600}, AspectRatio -> 2]
> Finally, I'm about to give up on getting reasonable Legends on my plots.
> Does the PlotLegend option work for MultipleListPlot? Sometimes it
> will show a Legend for me, and sometimes it won't.
Have not done legends.
> FYI, I'm using Mathematica 3.0 on Linux.
> -Brett
>
>