MaplePrimes - answers and comments on Question, read-save mysteries

export as Maple Input

Joe Riel — Fri, 16 Nov 2007 22:06:25 Z

One solution is to export the content of the worksheet as maple input, and then read that into a worksheet. In the worksheet that you want to save do

  File -> Export As

then type "myfile" in the "File Name" box and select "Maple Input (.mpl)" for the file type. If desired you can then inspect (and modify) the saved .mpl file in a text editor. In another Maple worksheet you can issue the command

  read "myfile.mpl";

You may have to specify the full path to myfile.mpl in the read statement.

After you do save nx; is

edgar — Mon, 26 Nov 2007 03:48:13 Z

After you do save nx; is there a file nx.* ? If not, there is no use trying to load it again. Maybe your permissions don't allow Maple to write in the default location. On my Mac, I always to something like currentdir("/Users/edgar/tmp/"): before trying to save a file. That is the full pathname of the directory where I want to put such temporary files. You can use some other location suitable for you. --- G A Edgar

read save again.

awass — Mon, 26 Nov 2007 08:05:48 Z

Hi, I can save a few names in a file to a new file that appears on my desktop and have been successful in reading in those names to a new worksheet. However, I have not been able to save my current worksheet and then read it back. I have tried the Export suggestion of Joe Riel to no avail. I have tried to save anames to a file but that does not work either for some very strange reason.(I have been able to do > xn:=aname('user'): >save nm, savtry10; and that works. Here is a toy example: a:=b^2+1; 2 b + 1 x:=sin(a); / 2 \ sin\b + 1/ y:=z->a*z-x*z^2; 2 z -> a z - x z save anames('user'), savtry9; Error, save can only save names # I do not see any error here. anames('user'); y, x, a save a,x,y, savtry10; #Note that this has worked! whattype(anames('user')); exprseq nm:=anames('user'); y, x, a save nm, savtry11; # Again, this has worked. Thanks for help and suggestions. rick

save

Robert Israel — Mon, 26 Nov 2007 14:13:09 Z

Actually, that doesn't work. The help page for ?save says

Each argument except the last one is "evaluated to a name", while the last argument (the file name) is fully evaluated.

In your example

> nm := anames('user');
> save nm, savtry11;

the only variable whose value will be saved is nm: the contents of the file savtry11 will be

nm := y, x, a;

and the values of y, x and a are not saved. That remark about evaluation to a name is also the reason why

> save(anames('user'), savtry9);

doesn't work: save doesn't evaluate its argument anames('user'). A work-around is this:

> parse(sprintf("save %q", anames('user'), savtry12), 
     statement);

OK

awass — Tue, 20 Nov 2007 02:41:26 Z

Thank you for the suggestion. I am going to try that right now.